124 results
Search Results
2. Rainfall Algorithms Using Oceanic Satellite Observations from MWHS-2.
- Author
-
Chen, Ruiyao and Bennartz, Ralf
- Subjects
PRECIPITATION probabilities ,BRIGHTNESS temperature ,ALGORITHMS ,STATISTICAL correlation ,CLIMATOLOGY - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
3. Preface to the Special Issue on Summer 2020: Record Rainfall in Asia — Mechanisms, Predictability and Impacts.
- Author
-
Clark, Robin T., Dong, Xiquan, Ho, Chang-Hoi, Sun, Jianhua, Yuan, Huiling, and Takemi, Tetsuya
- Subjects
ATMOSPHERIC physics ,DIURNAL variations of rainfall ,METEOROLOGICAL research ,ATMOSPHERIC sciences ,CLIMATOLOGY ,SUMMER - Published
- 2021
- Full Text
- View/download PDF
4. Reducing Uncertainties in Climate Projections with Emergent Constraints: Concepts, Examples and Prospects.
- Author
-
Brient, Florent
- Subjects
CLIMATE sensitivity ,CLIMATE feedbacks ,INFERENTIAL statistics ,CLIMATOLOGY ,CLIMATE change - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
5. Pathways of Influence of the Northern Hemisphere Mid-high Latitudes on East Asian Climate: A Review.
- Author
-
Li, Jianping, Zheng, Fei, Sun, Cheng, Feng, Juan, and Wang, Jing
- Subjects
LATITUDE ,CLIMATOLOGY ,DEFINITIONS - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
6. Recent Progress in Studies of the Variabilities and Mechanisms of the East Asian Monsoon in a Changing Climate.
- Author
-
Chen, Wen, Wang, Lin, Feng, Juan, Wen, Zhiping, Ma, Tiaojiao, Yang, Xiuqun, and Wang, Chenghai
- Subjects
CLIMATE change ,MONSOONS ,EL Nino ,CLIMATOLOGY - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
7. The Relationship between Deterministic and Ensemble Mean Forecast Errors Revealed by Global and Local Attractor Radii.
- Author
-
Feng, Jie, Li, Jianping, Zhang, Jing, Liu, Deqiang, and Ding, Ruiqiang
- Subjects
WEATHER forecasting ,DETERMINISTIC processes ,ATTRACTORS (Mathematics) ,DYNAMICAL systems ,CLIMATOLOGY - Abstract
It has been demonstrated that ensemble mean forecasts, in the context of the sample mean, have higher forecasting skill than deterministic (or single) forecasts. However, few studies have focused on quantifying the relationship between their forecast errors, especially in individual prediction cases. Clarification of the characteristics of deterministic and ensemble mean forecasts from the perspective of attractors of dynamical systems has also rarely been involved. In this paper, two attractor statistics—namely, the global and local attractor radii (GAR and LAR, respectively)—are applied to reveal the relationship between deterministic and ensemble mean forecast errors. The practical forecast experiments are implemented in a perfect model scenario with the Lorenz96 model as the numerical results for verification. The sample mean errors of deterministic and ensemble mean forecasts can be expressed by GAR and LAR, respectively, and their ratio is found to approach 2 with lead time. Meanwhile, the LAR can provide the expected ratio of the ensemble mean and deterministic forecast errors in individual cases. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
8. Representation of the ENSO Combination Mode and its Asymmetric SST Response in Different Resolutions of HadGEM3.
- Author
-
Wan, Jianghua, Ren, Hongli, and Wu, Peili
- Subjects
SURFACE temperature ,ATMOSPHERIC pressure ,OCEAN temperature ,ATMOSPHERIC models ,METEOROLOGICAL precipitation ,SOUTHERN oscillation ,CLIMATOLOGY - Abstract
Previous studies have revealed a combination mode (C-mode) occurring in the Indo-Pacific region, arising from nonlinear interactions between ENSO and the western Pacific warm pool annual cycle. This paper evaluates the simulation of this C-mode and its asymmetric SST response in HadGEM3 and its resolution sensitivity using three sets of simulations at horizontal resolutions of N96, N216 and N512. The results show that HadGEM3 can capture well the spatial pattern of the C-mode associated surface wind anomalies, as well as the asymmetric response of SST in the tropical Pacific, but it strongly overestimates the explained variability of the C-mode compared to the ENSO mode. The model with the three resolutions is able to reproduce the distinct spectral peaks of the C-mode at the near annual combination frequencies, but the performance in simulating the longer periods is not satisfactory, presumably due to the unrealistic simulation of the ENSO mode. Increasing the horizontal resolution can improve the consistency between atmospheric and oceanic representations of the C-mode, but not necessarily enhance the accuracy of C-mode simulation compared with observation. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
9. Assessment and Assimilation of FY-3 Humidity Sounders and Imager in the UK Met Office Global Model.
- Author
-
Carminati, Fabien, Candy, Brett, Bell, William, and Atkinson, Nigel
- Subjects
HUMIDITY ,NUMERICAL weather forecasting ,WEATHER forecasting ,ATMOSPHERIC circulation ,CLIMATE change ,ENVIRONMENTAL monitoring ,CLIMATOLOGY - Abstract
China’s FengYun 3 (FY-3) polar orbiting satellites are set to become an important source of observational data for numerical weather prediction (NWP), atmospheric reanalyses, and climate monitoring studies over the next two decades. As part of the Climate Science for Service Partnership China (CSSP China) program, FY-3B Microwave Humidity Sounder 1 (MWHS-1) and FY-3C MWHS-2 observations have been thoroughly assessed and prepared for operational assimilation. This represents the first time observations from China’s polar orbiting satellites have been used in the UK’s global NWP model. Since 2016, continuous data quality monitoring has shown occasional bias changes found to be correlated to changes in the energy supply scheme regulating the platform heating system and other transient anomalies. Nonetheless, MWHS-1 and MWHS-2 significantly contribute to the 24-h forecast error reduction by 0.3% and 0.6%, respectively, and the combination of both instruments is shown to improve the fit to the model background of independent sounders by up to 1%. The observations from the Microwave Radiation Imager (MWRI) also are a potentially significant source of benefits for NWP models, but a solar-dependent bias observed in the instrument half-orbits has prevented their assimilation. This paper presents the bases of a correction scheme developed at the Met Office for the purpose of a future assimilation of MWRI data. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
10. Dynamical feedback between synoptic eddy and low-frequency flow as simulated by BCC_CSM1.1(m).
- Author
-
Zhou, Fang and Ren, Hong-Li
- Subjects
SYNOPTIC climatology ,CLIMATOLOGY ,REYNOLDS stress ,CLIMATE change ,VORTEX motion - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
- Full Text
- View/download PDF
11. Modeling aerosol climate effects over monsoon Asia: A collaborative research program.
- Author
-
Wang, Wei-Chyung, Chen, Guoxing, and Song, Yangyang
- Subjects
MONSOONS ,ATMOSPHERIC aerosols & the environment ,CLIMATOLOGY - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
- Full Text
- View/download PDF
12. Projected shifts in Köppen climate zones over China and their temporal evolution in CMIP5 multi-model simulations.
- Author
-
Chan, Duo, Wu, Qigang, Jiang, Guixiang, and Dai, Xianglin
- Subjects
CLIMATOLOGY ,FORESTS & forestry ,NATURAL resources - Abstract
Previous studies have examined the projected climate types in China by 2100. This study identified the emergence time of climate shifts at a 1◦ scale over China from 1990 to 2100 and investigated the temporal evolution of Köppen-Geiger climate classifications computed from CMIP5 multi-model outputs. Climate shifts were detected in transition regions (7%-8% of China's land area) by 2010, including rapid replacement of mixed forest (Dwb) by deciduous forest (Dwa) over Northeast China, strong shrinkage of alpine climate type (ET) on the Tibetan Plateau, weak northward expansion of subtropical winterdry climate (Cwa) over Southeast China, and contraction of oceanic climate (Cwb) in Southwest China. Under all future RCP (Representative Concentration Pathway) scenarios, the reduction of Dwb in Northeast China and ET on the Tibetan Plateau was projected to accelerate substantially during 2010-30, and half of the total area occupied by ET in 1990 was projected to be redistributed by 2040. Under the most severe scenario (RCP8.5), sub-polar continental winter dry climate over Northeast China would disappear by 2040-50, ET on the Tibetan Plateau would disappear by 2070, and the climate types in 35.9% and 50.8% of China's land area would change by 2050 and 2100, respectively. The results presented in this paper indicate imperative impacts of anthropogenic climate change on China's ecoregions in future decades. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
13. Performance of the seasonal forecasting of the Asian summer monsoon by BCC_CSM1.1(m).
- Author
-
Liu, Xiangwen, Wu, Tongwen, Yang, Song, Jie, Weihua, Nie, Suping, Li, Qiaoping, Cheng, Yanjie, and Liang, Xiaoyun
- Subjects
MONSOONS ,WIND forecasting ,OCEAN temperature ,EL Nino ,CLIMATOLOGY - Abstract
This paper provides a comprehensive assessment of Asian summer monsoon prediction skill as a function of lead time and its relationship to sea surface temperature prediction using the seasonal hindcasts of the Beijing Climate Center Climate System Model, BCC CSM1.1(m). For the South and Southeast Asian summer monsoon, reasonable skill is found in the model's forecasting of certain aspects of monsoon climatology and spatiotemporal variability. Nevertheless, deficiencies such as significant forecast errors over the tropical western North Pacific and the eastern equatorial Indian Ocean are also found. In particular, overestimation of the connections of some dynamical monsoon indices with large-scale circulation and precipitation patterns exists in most ensemble mean forecasts, even for short lead-time forecasts. Variations of SST, measured by the first mode over the tropical Pacific and Indian oceans, as well as the spatiotemporal features over the Ni˜no3.4 region, are overall well predicted. However, this does not necessarily translate into successful forecasts of the Asian summer monsoon by the model. Diagnostics of the relationships between monsoon and SST show that difficulties in predicting the South Asian monsoon can be mainly attributed to the limited regional response of monsoon in observations but the extensive and exaggerated response in predictions due partially to the application of ensemble average forecasting methods. In contrast, in spite of a similar deficiency, the Southeast Asian monsoon can still be forecasted reasonably, probably because of its closer relationship with large-scale circulation patterns and El Ni˜no-Southern Oscillation. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
14. Preface to Special Issue on Climate Science for Service Partnership China.
- Author
-
Belcher, Stephen, Stott, Peter, Song, Lianchun, Chao, Qingchen, Lu, Riyu, and Zhou, Tianjun
- Subjects
CLIMATE change ,CLIMATOLOGY ,ATMOSPHERIC models ,ATMOSPHERIC sciences ,ATMOSPHERIC circulation - Published
- 2018
- Full Text
- View/download PDF
15. The Warm Arctic—Cold Eurasia Pattern and Its Key Region in Winter in CMIP6 Model Simulations.
- Author
-
Zhao, Liang, Liu, Yunwen, Ding, Yihui, Li, Qingquan, Dong, Wei, Shen, Xinyong, Cheng, Wei, Yao, Haoxin, and Xiao, Ziniu
- Subjects
ATMOSPHERIC models ,ATMOSPHERIC temperature ,SURFACE temperature ,SIMULATION methods & models ,CLIMATOLOGY ,WINTER - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
16. Dynamical Predictability of Leading Interannual Variability Modes of the Asian-Australian Monsoon in Climate Models.
- Author
-
Wang, Lin, Ren, Hong-Li, Zhou, Fang, Dunstone, Nick, and Xu, Xiangde
- Subjects
ATMOSPHERIC models ,EL Nino ,CLIMATOLOGY ,PHASE transitions ,SPRING ,MONSOONS ,SOUTHERN oscillation - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
17. Impact of urbanization on low-temperature precipitation in Beijing during 1960-2008.
- Author
-
Han, Zuoqiang, Yan, Zhongwei, Li, Zhen, Liu, Weidong, and Wang, Yingchun
- Subjects
URBANIZATION ,METEOROLOGICAL precipitation ,CLIMATOLOGY ,GLOBAL warming ,SEASONS ,CITIES & towns - Abstract
Daily precipitation and temperature records at 13 stations for the period 1960-2008 were analyzed to identify climatic change and possible effects of urbanization on low-temperature precipitation [LTP, precipitation of ⩾ 0.1 mm d occurring under a daily minimum temperature (Tmin) of ⩽ 0°C] in the greater Beijing region (BJR), where a rapid process of urbanization has taken place over the last few decades. The paper provides a climatological overview of LTP in BJR. LTP contributes 61.7% to the total amount of precipitation in BJR in the cold season (November-March). There is a slight increasing trend [1.22 mm (10 yr)] in the amount of total precipitation for the cold season during 1960-2008. In contrast, the amount of LTP decreases by 0.6 mm (10 yr). The warming rate of Tmin in BJR is 0.66°C (10 yr). Correspondingly, the frequency of LTP decreases with increasing Tmin by −0.67 times per °C. The seasonal frequency and amount of LTP in southeast BJR (mostly urban sites) are 17%-20% less than those in the northwestern (rural and montane sites). The intensity of LTP for the urban sites and northeastern BJR exhibited significant enhancing trends [0.18 and 0.15 mm d (10 yr), respectively]. The frequency of slight LTP (<0.2 mm d) significantly decreased throughout BJR [by about 5.74% (10 yr) in the urban area and northeast BJR], while the contribution of the two heaviest LTP events to total LTP amount significantly increased by 3.2% (10 yr). [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
18. Spatial modeling of the highest daily maximum temperature in Korea via max-stable processes.
- Author
-
Lee, Youngsaeng, Yoon, Sanghoo, Murshed, Md., Kim, Maeng-Ki, Cho, ChunHo, Baek, Hee-Jeong, and Park, Jeong-Soo
- Subjects
CLIMATOLOGY ,PSYCHOLOGICAL vulnerability ,GEOLOGICAL modeling ,VALUE distribution theory ,TEMPERATURE - Abstract
This paper examines the annual highest daily maximum temperature (DMT) in Korea by using data from 56 weather stations and employing spatial extreme modeling. Our approach is based on max-stable processes (MSP) with Schlather's characterization. We divide the country into four regions for a better model fit and identify the best model for each region. We show that regional MSP modeling is more suitable than MSP modeling for the entire region and the pointwise generalized extreme value distribution approach. The advantage of spatial extreme modeling is that more precise and robust return levels and some indices of the highest temperatures can be obtained for observation stations and for locations with no observed data, and so help to determine the effects and assessment of vulnerability as well as to downscale extreme events. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
19. The impact of ecosystem functional type changes on the La Plata Basin climate.
- Author
-
Lee, Seung-Jae, Berbery, E., and Alcaraz-Segura, Domingo
- Subjects
ECOSYSTEM dynamics ,FUNCTIONAL analysis ,CLIMATOLOGY ,LAND cover ,CLIMATE change - Abstract
In this paper, the effects of land cover changes on the climate of the La Plata Basin in southern South America are investigated using the Weather and Research Forecasting (WRF) Model configured on a 30/10-km two-way interactive nested grid. To assess the regional climate changes resulting from land surface changes, the standard land cover types are replaced by time-varying Ecosystem Functional Types (EFTs), which is a newly devised land-cover classification that characterizes the spatial and interannual variability of surface vegetation dynamics. These variations indicate that natural and anthropogenic activities have caused changes in the surface physical parameters of the basin, such as albedo and roughness length, that contributed to regional climate changes. EFTs are obtained from functional attributes of vegetation computed from properties of the Normalized Difference Vegetation Index (NDVI) to represent patches of the land surface with homogeneous energy and gas exchanges with the atmosphere. Four simulations are conducted, each experimental period ranging from September to November in two contrasting years, 1988 and 1998. The influence of an identical EFT change on the surface heat fluxes, 2-m temperature and humidity, 10-m winds, convective instabilities and large-scale moisture fluxes and precipitation are explored for 1988 (a dry year) and 1998 (a wet year). Results show that the surface and atmospheric climate has a larger response to the same EFT changes in a dry year for 2-m temperature and 10-m wind; the response is larger in a wet year for 2-m water vapor mixing ratio, convective available potential energy, vertically integrated moisture fluxes and surface precipitation. For EFTs with high productivity and a weak seasonal cycle, the nearsurface temperature during the spring of 1988 and 1998 increased by as much as 1°C in the central and western portions of La Plata Basin. Additionally, for higher productivity EFTs, precipitation differences were generally positive in both dry and wet years, although the patterns are not uniform and exhibit certain patchiness with drier conditions. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
20. The behaviors of optimal precursors during wintertime Eurasian blocking onset.
- Author
-
Jiang, Zhina and Wang, Donghai
- Subjects
NONLINEAR analysis ,WINTER ,CLIMATOLOGY ,BLOCKING (Meteorology) ,SPECTRUM analysis ,NUMERICAL analysis ,ECOLOGICAL disturbances - Abstract
In this paper the optimal precursors for wintertime Eurasian blocking onset are acquired by solving a nonlinear optimization problem whose objective function is constructed based on a blocking index with a triangular T21, three-level, quasi-geostrophic global spectral model. The winter climatological state is chosen as the reference basic state. Numerical results show that the optimal precursors are characterized by a baroclinic pattern with a westward tilt with height, which are mainly located upstream of the blocking region. For an optimization time of 5 days, these perturbations are mainly localized over the Northeast Atlantic Ocean and continental Europe. With the extension of the optimization time to 8 days, these perturbations are distributed more upstream and extensively in the zonal direction. Wave spectrum analysis reveals that the optimal precursors are composed of not only synoptic-scale (wave numbers 5-18) waves, but planetary-scale (wave numbers 0-4) waves as well. The synoptic-scale optimal precursors are mainly located in the mid-latitude area, while the planetary-scale optimal precursors focus primarily on the high-latitude region. The formation of a strong planetary-scale positive blocking anomaly is accompanied by the reinforcement of synoptic-scale perturbations and further fragmentation into two branches, in which the northern branch is generally stronger than the southern one. The eddy forcing arising from the self-interaction of synoptic-scale disturbances is shown to be crucial in triggering the dipole blocking anomaly, and the planetary-scale optimal precursor provides the initial favorable background conditions for blocking onset. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
21. Climatology and interannual variability of the southeast asian summer monsoon.
- Author
-
Lau, K. and Yang, Song
- Abstract
In this paper, results from a pilot study for the South China Sea Monsoon Experiment are reported. Based on analyses of 9 years of pentad and monthly mean data, the climatology of subseasonal features and interannual variability of the Southeast Asian monsoon (SEAM) are documented. The present analysis is focused on the sudden onset of the South China Sea monsoon and its relation to the atmospheric and oceanic processes on the entire Asian monsoon region. It is found that the onset of the SEAM occurs around mid-May, signaling the earliest stage of the entire Asian summer monsoon system. The establishment of monsoon rainfall over the South China Sea is abrupt, being accompanied by substantial changes in the large scale atmospheric circulation and sea surface temperature in the adjacent oceans. The onset and fluctuations of SEAM involve the interaction and metamorphosis of the large scale convection over the Indo-China, the South China Sea and the southern Bay of Bengal. Results show that the onset time of the SEAM differs greatly from one year to another. The delayed (advanced) onset of the monsoon may be related to basin-wide warm (cold) events of the Pacific and Indian Oceans. We also present evidence showing that the SEAM fluctuations in May may foreshadow the development of the full-scale Asian summer monsoon during the subsequent months. [ABSTRACT FROM AUTHOR]
- Published
- 1997
- Full Text
- View/download PDF
22. Preface to the Special Issue: Climate Change and Variability of Tropical Cyclone Activity.
- Author
-
Wu, Liguang, Wang, Bin, Chan, Johnny C. L., Ha, Kyung-Ja, Moon, Il-Ju, Matsumoto, Jun, Tan, Zhemin, and Fan, Ke
- Subjects
CLIMATE change ,TROPICAL cyclones ,ATMOSPHERIC physics ,ATMOSPHERIC sciences ,CLIMATOLOGY ,EL Nino - Published
- 2022
- Full Text
- View/download PDF
23. Calculating the Climatology and Anomalies of Surface Cloud Radiative Effect Using Cloud Property Histograms and Cloud Radiative Kernels.
- Author
-
Zhou, Chen, Liu, Yincheng, and Wang, Quan
- Subjects
CLIMATOLOGY ,HISTOGRAMS ,ATMOSPHERIC models ,RADIATIVE transfer ,SURFACE temperature - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
24. Change in Precipitation over the Tibetan Plateau Projected by Weighted CMIP6 Models.
- Author
-
Zhao, Yin, Zhou, Tianjun, Zhang, Wenxia, and Li, Jian
- Subjects
CLIMATOLOGY ,TWENTY-first century ,DECISION making ,SEASONS - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
25. Seasonal Prediction of Summer Precipitation over East Africa Using NUIST-CFS1.0.
- Author
-
Asfaw, Temesgen Gebremariam and Luo, Jing-Jia
- Subjects
PRECIPITATION anomalies ,CLIMATOLOGY ,SEASONS ,TECHNOLOGICAL forecasting ,PRECIPITATION variability ,SUMMER ,WATER security - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
26. Climatology of Tropical Cyclone Extreme Rainfall over China from 1960 to 2019.
- Author
-
Li, Ying and Zhao, Dajun
- Subjects
TROPICAL cyclones ,CLIMATOLOGY ,EMERGENCY management ,FLOOD damage ,REGIONAL differences - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
27. Two Types of Diurnal Variations in Heavy Rainfall during July over Korea.
- Author
-
Park, Chang-Kyun, Chang, Minhee, Ho, Chang-Hoi, Ha, Kyung-Ja, Kim, Jinwon, and Sohn, Byung-Ju
- Subjects
DIURNAL variations of rainfall ,ATMOSPHERIC circulation ,RAINFALL periodicity ,CLIMATOLOGY - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
28. Evaluation of Surface Relative Humidity in China from the CRA-40 and Current Reanalyses.
- Author
-
Zhang, Jingpeng, Zhao, Tianbao, Li, Zhi, Li, Chunxiang, Li, Zhen, Ying, Kairan, Shi, Chunxiang, Jiang, Lipeng, and Zhang, Wenyu
- Subjects
ORTHOGONAL functions ,CLIMATOLOGY ,HUMIDITY - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
29. Projected Increase in Probability of East Asian Heavy Rainy Summer in the 21st Century by CMIP5 Models.
- Author
-
Fu, Yuanhai, Lu, Riyu, and Guo, Dong
- Subjects
MONSOONS ,WATER vapor transport ,TWENTY-first century ,SUMMER ,CLIMATOLOGY ,PROBABILITY theory - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
30. The Significant Role of Radiosonde-measured Cloud-base Height in the Estimation of Cloud Radiative Forcing.
- Author
-
Xu, Hui, Guo, Jianping, Li, Jian, Liu, Lin, Chen, Tianmeng, Guo, Xiaoran, Lyu, Yanmin, Wang, Ding, Han, Yi, Chen, Qi, and Zhang, Yong
- Subjects
RADIATIVE forcing ,ESTIMATION bias ,RADIOSONDES ,UNCERTAINTY ,ATMOSPHERE - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
31. Assessment of Snow Depth over Arctic Sea Ice in CMIP6 Models Using Satellite Data.
- Author
-
Chen, Shengzhe, Liu, Jiping, Ding, Yifan, Zhang, Yuanyuan, Cheng, Xiao, and Hu, Yongyun
- Subjects
SNOW accumulation ,SEA ice ,ATMOSPHERIC models ,CLIMATOLOGY - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
32. Fidelity of the APHRODITE Dataset in Representing Extreme Precipitation over Central Asia.
- Author
-
Lai, Sheng, Xie, Zuowei, Bueh, Cholaw, and Gong, Yuanfa
- Subjects
PRECIPITATION gauges ,CLIMATOLOGY ,RAINFALL ,INTERPOLATION ,PROBABILITY theory - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
33. Does CMIP6 Inspire More Confidence in Simulating Climate Extremes over China?
- Author
-
Zhu, Huanhuan, Jiang, Zhihong, Li, Juan, Li, Wei, Sun, Cenxiao, and Li, Laurent
- Subjects
CLIMATOLOGY ,ATMOSPHERIC models ,CONFIDENCE - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
34. Differences between CMIP6 and CMIP5 Models in Simulating Climate over China and the East Asian Monsoon.
- Author
-
Jiang, Dabang, Hu, Dan, Tian, Zhiping, and Lang, Xianmei
- Subjects
MONSOONS ,ATMOSPHERIC models ,PRECIPITATION variability ,ARITHMETIC mean ,CLIMATOLOGY - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
35. Responses of Mean and Extreme Precipitation to Different Climate Forcing Under Radiative-Convective Equilibrium.
- Author
-
Ma, Chenyu, Yuan, Wei, and Ni, Ji
- Subjects
STRATOSPHERIC aerosols ,TROPOSPHERIC aerosols ,OZONE layer ,METEOROLOGICAL precipitation ,OCEAN temperature ,CLIMATOLOGY - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
36. A 38-Year Climatology of Explosive Cyclones over the Northern Hemisphere.
- Author
-
Fu, Gang, Sun, Yawen, Sun, Jilin, and Li, Pengyuan
- Subjects
CLIMATOLOGY ,OCEAN temperature ,CYCLONES ,WIND speed ,SEA level - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
37. Interdecadal Modulation of AMO on the Winter North Pacific Oscillation-Following Winter ENSO Relationship.
- Author
-
Chen, Shangfeng, Song, Linye, and Chen, Wen
- Subjects
ATLANTIC multidecadal oscillation ,EL Nino ,WESTERLIES ,OCEAN temperature ,WINTER ,SOUTHERN oscillation ,CLIMATOLOGY - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
38. Climate and Vegetation Drivers of Terrestrial Carbon Fluxes: A Global Data Synthesis.
- Author
-
Chen, Shutao, Zou, Jianwen, Hu, Zhenghua, and Lu, Yanyu
- Subjects
LEAF area index ,CLIMATE change ,CLIMATOLOGY ,CARBON cycle ,FLUX (Energy) ,PLANTS - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
39. Intermodel Diversity in the Zonal Location of the Climatological East Asian Westerly Jet Core in Summer and Association with Rainfall over East Asia in CMIP5 Models.
- Author
-
Lin, Zhongda, Fu, Yuanhai, and Lu, Riyu
- Subjects
WESTERLIES ,RAINFALL ,CLIMATOLOGY ,SUMMER ,ASIANS ,CORE & periphery (Economic theory) - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
40. Verification and Improvement of the Ability of CFSv2 to Predict the Antarctic Oscillation in Boreal Spring.
- Author
-
Zhang, Dapeng, Huang, Yanyan, Sun, Bo, Li, Fei, and Wang, Huijun
- Subjects
ANTARCTIC oscillation ,CLIMATOLOGY ,OCEAN temperature ,SEA ice ,AUTUMN - Abstract
The boreal spring Antarctic Oscillation (AAO) has a significant impact on the spring and summer climate in China. This study evaluates the capability of the NCEP's Climate Forecast System, version 2 (CFSv2), in predicting the boreal spring AAO for the period 1983-2015. The results indicate that CFSv2 has poor skill in predicting the spring AAO, failing to predict the zonally symmetric spatial pattern of the AAO, with an insignificant correlation of 0.02 between the predicted and observed AAO Index (AAOI). Considering the interannual increment approach can amplify the prediction signals, we firstly establish a dynamical-statistical model to improve the interannual increment of the AAOI (DY AAOI), with two predictors of CFSv2-forecasted concurrent spring sea surface temperatures and observed preceding autumn sea ice. This dynamical-statistical model demonstrates good capability in predicting DY AAOI, with a significant correlation coefficient of 0.58 between the observation and prediction during 1983-2015 in the two-year-out cross-validation. Then, we obtain an improved AAOI by adding the improved DY AAOI to the preceding observed AAOI. The improved AAOI shows a significant correlation coefficient of 0.45 with the observed AAOI during 1983-2015. Moreover, the unrealistic atmospheric response to March-April-May sea ice in CFSv2 may be the possible cause for the failure of CFSv2 to predict the AAO. This study gives new clues regarding AAO prediction and short-term climate prediction. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
41. Seesaw Pattern of Rainfall Anomalies between the Tropical Western North Pacific and Central Southern China during Late Summer.
- Author
-
Li, Xinyu and Lu, Riyu
- Subjects
RAINFALL anomalies ,ANTICYCLONES ,CLIMATOLOGY ,MONSOONS ,SUMMER - Abstract
It is well known that suppressed convection in the tropical western North Pacific (WNP) induces an anticyclonic anomaly, and this anticyclonic anomaly results in more rainfall along the East Asian rain band through more water vapor transport during summer, as well as early and middle summer. However, the present results indicate that during late summer (from mid-August to the beginning of September), the anomalous anticyclone leads to more rainfall over central southern China (CSC), a region quite different from preceding periods. The uniqueness of late summer is found to be related to the dramatic change in climatological monsoon flows: southerlies over southern China during early and middle summer but easterlies during late summer. Therefore, the anomalous anticyclone, which shows a southerly anomaly over southern China, enhances monsoonal southerlies and induces more rainfall along the rain band during early and middle summer. During late summer, however, the anomalous anticyclone reflects a complicated change in monsoon flows: it changes the path, rather than the intensity, of monsoon flows. Specifically, during late summers of suppressed convection in the tropical WNP, southerlies dominate from the South China Sea to southern China, and during late summers of enhanced convection, northeasterlies dominate from the East China Sea to southern China, causing more and less rainfall in CSC, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
42. Role of the Nocturnal Low-level Jet in the Formation of the Morning Precipitation Peak over the Dabie Mountains.
- Author
-
Fu, Peiling, Zhu, Kefeng, Zhao, Kun, Zhou, Bowen, and Xue, Ming
- Subjects
METEOROLOGICAL precipitation ,RAIN gauges ,ATMOSPHERIC boundary layer ,ATMOSPHERIC circulation ,CLIMATOLOGY - Abstract
The diurnal variation of precipitation over the Dabie Mountains (DBM) in eastern China during the 2013 mei-yu season is investigated with forecasts of a regional convection-permitting model. Simulated precipitation is verified against surface rain-gauge observations. The observed morning precipitation peak on the windward (relative to the prevailing synoptic-scale wind) side of the DBM is reproduced with good spatial and temporal accuracy. The interaction between the DBM and a nocturnal boundary layer low-level jet (BLJ) due to the inertial oscillation mechanism is shown to be responsible for this precipitation peak. The BLJ is aligned with the lower-level southwesterly synoptic-scale flow that carries abundant moisture. The BLJ core is established at around 0200 LST upwind of the mountains. It moves towards the DBM and reaches maximum intensity at about 70 km ahead of the mountains. When the BLJ impinges upon the windward side of the DBM in the early morning, mechanical lifting of moist air leads to condensation and subsequent precipitation. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
43. Factors Limiting the Forecast Skill of the Boreal Summer Intraseasonal Oscillation in a Subseasonal-to-Seasonal Model.
- Author
-
He, Zheng, Hsu, Pangchi, Liu, Xiangwen, Wu, Tongwen, and Gao, Yingxia
- Subjects
MADDEN-Julian oscillation ,CLIMATOLOGY ,RADIATION ,HIGH temperature (Weather) ,ATMOSPHERIC circulation - Abstract
In this study, we evaluate the forecast skill of the subseasonal-to-seasonal (S2S) prediction model of the Beijing Climate Center (BCC) for the boreal summer intraseasonal oscillation (BSISO). We also discuss the key factors that inhibit the BSISO forecast skill in this model. Based on the bivariate anomaly correlation coefficient (ACC) of the BSISO index, defined by the first two EOF modes of outgoing longwave radiation and 850-hPa zonal wind anomalies over the Asian monsoon region, we found that the hindcast skill degraded as the lead time increased. The ACC dropped to below 0.5 for lead times of 11 days and longer when the predicted BSISO showed weakened strength and insignificant northward propagation.To identify what causes the weakened forecast skill of BSISO at the forecast lead time of 11 days, we diagnosed the main mechanisms responsible for the BSISO northward propagation. The same analysis was also carried out using the observations and the outputs of the four-day forecast lead that successfully predicted the observed northward-propagating BSISO. We found that the lack of northward propagation at the 11-day forecast lead was due to insufficient increases in low-level cyclonic vorticity, moistening and warm temperature anomalies to the north of the convection, which were induced by the interaction between background mean flows and BSISO-related anomalous fields. The BCC S2S model can predict the background monsoon circulations, such as the low-level southerly and the northerly and easterly vertical shears, but has limited capability in forecasting the distributions of circulation and moisture anomalies. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
44. Two Types of Flash Drought and Their Connections with Seasonal Drought.
- Author
-
Wang, Linying and Yuan, Xing
- Subjects
DROUGHTS ,SOIL moisture ,CLIMATE change ,METEOROLOGICAL precipitation ,CLIMATOLOGY - Abstract
Flash drought is a rapidly intensifying drought with abnormally high temperature, which has greatly threatened crop yields and water supply, and aroused wide public concern in a warming climate. However, the preferable hydrometeorological conditions for flash drought and its association with conventional drought at longer time scales remain unclear. Here, we investigate two types of flash drought over China: one is high-temperature driven (Type I), while the other is water-deficit driven (Type II). Results show that the frequencies of the two types of flash drought averaged over China during the growing season are comparable. Type I flash drought tends to occur over southern China, where moisture supply is sufficient, while Type II is more likely to occur over semi-arid regions such as northern China. Both types of flash drought increase significantly (p < 0.01) during 1979-2010, with a doubled rise in Type I as compared with Type II. Composite analysis shows that high temperature quickly increases evapotranspiration (ET) and reduces soil moisture from two pentads before the onset of Type I flash drought. In contrast, there are larger soil moisture deficits two pentads before the onset of Type II flash drought, leading to a decrease in ET and increase in temperature. For flash drought associated with seasonal drought, there is a greater likelihood of occurrence during the onset and recovery phases of seasonal drought, suggesting perfect conditions for flash drought during transition periods. This study provides a basis for the early warning of flash drought by connecting multiscale drought phenomena. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
45. Impact of Mid- and Upper-Level Dry Air on Tropical Cyclone Genesis and Intensification: A Modeling Study of Durian (2001).
- Author
-
Wang, Yaping, Huang, Yongjie, and Cui, Xiaopeng
- Subjects
TROPICAL cyclones ,ATMOSPHERIC pressure ,METEOROLOGICAL precipitation ,VORTEX motion ,CLIMATOLOGY - Abstract
The impact of mid- and upper-level dry air, represented by low relative humidity (RH) values, on the genesis of tropical cyclone (TC) Durian (2001) in the South China Sea was investigated by a series of numerical experiments using the Weather Research and Forecasting model. The mid-level RH was lowered in different regions relative to TC Durian (2001)’s genesis location. Results suggest that the location of dry air was important to Durian (2001)’s genesis and intensification. The rapid development of the TC was accompanied by sustained near-saturated mid- and upper-level air, whereas low humidity decelerated its development. Water vapor budget analysis showed that moisture at mid and upper levels was mainly supplied by the vertical convergence of moisture flux and the divergence terms, and consumed by the condensation process. The horizontal convergence of moisture flux term supplied moisture in the air moistening process but consumed moisture in the air drying process. With a dryer mid- and upper-level environment, convective and stratiform precipitation were both inhibited. The upward mass fluxes and the diabatic heating rates associated with these two precipitation types were also suppressed. Generally, convection played the dominant role, since the impact of the stratiform process on vertical mass transportation and diabatic heating was much weaker. The vorticity budget showed that the negative vorticity convergence term, which was closely related to the inhibited convection, caused the vorticity to decrease above the lower troposphere in a dryer environment. The negative vorticity tendency is suggested to slow down the vertical coherence and the development rate of TCs. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
46. Skillful Seasonal Forecasts of Summer Surface Air Temperature in Western China by Global Seasonal Forecast System Version 5.
- Author
-
Li, Chaofan, Lu, Riyu, Bett, Philip E., Scaife, Adam A., and Martin, Nicola
- Subjects
EARTH temperature ,SEASONAL temperature variations ,ATMOSPHERIC circulation ,OCEAN temperature ,CLIMATOLOGY - Abstract
Variations of surface air temperature (SAT) are key in affecting the hydrological cycle, ecosystems and agriculture in western China in summer. This study assesses the seasonal forecast skill and reliability of SAT in western China, using the GloSea5 operational forecast system from the UK Met Office. Useful predictions are demonstrated, with considerable skill over most regions of western China. The temporal correlation coefficients of SAT between model predictions and observations are larger than 0.6, in both northwestern China and the Tibetan Plateau. There are two important sources of skill for these predictions in western China: interannual variation of SST in the western Pacific and the SST trend in the tropical Pacific. The tropical SST change in the recent two decades, with a warming in the western Pacific and cooling in the eastern Pacific, which is reproduced well by the forecast system, provides a large contribution to the skill of SAT in northwestern China. Additionally, the interannual variation of SST in the western Pacific gives rise to the reliable prediction of SAT around the Tibetan Plateau. It modulates convection around the Maritime Continent and further modulates the variation of SAT on the Tibetan Plateau via the surrounding circulation. This process is evident irrespective of detrending both in observations and the model predictions, and acts as a source of skill in predictions for the Tibetan Plateau. The predictability and reliability demonstrated in this study is potentially useful for climate services providing early warning of extreme climate events and could imply useful economic benefits. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
47. Further-Adjusted Long-Term Temperature Series in China Based on MASH.
- Author
-
Li, Zhen, Yan, Zhongwei, Cao, Lijuan, and Jones, Phil D.
- Subjects
EARTH temperature ,ATMOSPHERIC circulation ,ATMOSPHERIC sciences ,ATMOSPHERIC temperature ,CLIMATE change ,CLIMATOLOGY - Abstract
A set of homogenized monthly mean surface air temperature (SAT) series at 32 stations in China back to the 19th century had previously been developed based on the RHtest method by Cao et al., but some inhomogeneities remained in the dataset. The present study produces a further-adjusted and updated dataset based on the Multiple Analysis of Series for Homogenization (MASH) method. The MASH procedure detects 33 monthly temperature records as erroneous outliers and 152 meaningful break points in the monthly SAT series since 1924 at 28 stations. The inhomogeneous parts are then adjusted relative to the latest homogeneous part of the series. The new data show significant warming trends during 1924-2016 at all the stations, ranging from 0.48 to 3.57°C (100 yr)
−1 , with a regional mean trend of 1.65°C (100 yr)−1 ; whereas, the previous results ranged from a slight cooling at two stations to considerable warming, up to 4.5°C (100 yr)−1 . It is suggested that the further-adjusted data are a better representation of the large-scale pattern of climate change in the region for the past century. The new data are available online athttp://www.dx.doi.org/10.11922/sciencedb.516. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
48. Indian Ocean SST modes and Their Impacts as Simulated in BCC_CSM1.1(m) and HadGEM3.
- Author
-
Lu, Bo, Ren, Hong-Li, Eade, Rosie, and Andrews, Martin
- Subjects
RAINFALL anomalies ,ATMOSPHERIC pressure ,ATMOSPHERIC circulation ,WEATHER forecasting ,OCEAN temperature ,ATMOSPHERIC models ,CLIMATOLOGY - Abstract
The sea surface temperature anomalies (SSTAs) in the tropical Indian Ocean (TIO) show two dominant modes at interannual time scales, referred to as the Indian Ocean basin mode (IOBM) and dipole mode (IOD). Recent studies have shown that the IOBM and IOD not only affect the local climate, but also induce remarkable influences in East Asia via teleconnections. In this study, we assess simulations of the IOBM and IOD, as well as their teleconnections, using the operational seasonal prediction models from the Met Office (HadGEM3) and Beijing Climate Center [BCC CSM1.1(m)]. It is demonstrated that the spatial patterns and seasonal cycles are generally reproduced by the control simulations of BCC CSM1.1(m) and HadGEM3, although spectra biases exist. The relationship between the TIO SSTA and El Niño is successfully simulated by both models, including the persistent IOBM warming following El Niño and the IOD-El Niño interactions. BCC CSM1.1(m) and HadGEM3 are capable of simulating the observed local impact of the IOBM, such as the strengthening of the South Asian high. The influences of the IOBM on Yangtze River rainfall are also captured well by both models, although this teleconnection is slightly weaker in BCC CSM1.1(m) due to the underestimation of the northwestern Pacific subtropical high. The local effect of the IOD on East African rainfall is reproduced by both models. However, the remote control of the IOD on rainfall over southwestern China is not clear in either model. It is shown that the realistic simulations of TIO SST modes and their teleconnections give rise to the source of skillful seasonal predictions over China. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
49. Reduced Sensitivity of Tropical Cyclone Intensity and Size to Sea Surface Temperature in a Radiative-Convective Equilibrium Environment.
- Author
-
Wang, Shuai and Toumi, Ralf
- Subjects
OCEAN temperature ,TROPICAL cyclones ,GLOBAL temperature changes ,GLOBAL warming ,ATMOSPHERIC models ,ATMOSPHERIC circulation ,CLIMATE change ,CLIMATOLOGY - Abstract
It has been challenging to project the tropical cyclone (TC) intensity, structure and destructive potential changes in a warming climate. Here, we compare the sensitivities of TC intensity, size and destructive potential to sea surface warming with and without a pre-storm atmospheric adjustment to an idealized state of Radiative-Convective Equilibrium (RCE). Without RCE, we find large responses of TC intensity, size and destructive potential to sea surface temperature (SST) changes, which is in line with some previous studies. However, in an environment under RCE, the TC size is almost insensitive to SST changes, and the sensitivity of intensity is also much reduced to 3% °C
−1 -4% °C−1 . Without the pre-storm RCE adjustment, the mean destructive potential measured by the integrated power dissipation increases by about 25% °C−1 during the mature stage. However, in an environment under RCE, the sensitivity of destructive potential to sea surface warming does not change significantly. Further analyses show that the reduced response of TC intensity and size to sea surface warming under RCE can be explained by the reduced thermodynamic disequilibrium between the air boundary layer and the sea surface due to the RCE adjustment. When conducting regional-scale sea surface warming experiments for TC case studies, without any RCE adjustment the TC response is likely to be unrealistically exaggerated. The TC intensity-temperature sensitivity under RCE is very similar to those found in coupled climate model simulations. This suggests global mean intensity projections under climate change can be understood in terms of a thermodynamic response to temperature with only a minor contribution from any changes in large-scale dynamics. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
50. Increasing Flash Floods in a Drying Climate over Southwest China.
- Author
-
Xiao, Chan, Wu, Peili, Zhang, Lixia, and Clark, Robin T.
- Subjects
FLOODS ,CLIMATE change ,METEOROLOGICAL precipitation ,RAINFALL ,RAINFALL anomalies ,CLIMATOLOGY - Abstract
In a globally warming world, subtropical regions are generally expected to become drier while the tropics and mid-high latitudes become wetter. In line with this, Southwest China, close to 25°N, is expected to become increasingly prone to drought if annual mean precipitation decreases. However, despite this trend, changes in the temporal distribution of moisture supply might actually result in increased extreme rainfall in the region, whose climate is characterized by distinct dry and wet seasons. Using hourly and daily gauge observations, rainfall intensity changes since 1971 are examined for a network of 142 locations in the region. From the analysis, dry season changes are negligible but wet season changes exhibit a significantly strong downward trend [−2.4% (10 yr)
−1 ], particularly during the past 15 years [−17.7% (10 yr)−1 ]. However, the intensity of events during the wettest of 5% hours appears to steadily increase during the whole period [1.4% (10 yr)−1 ], tying in with government statistical reports of recent droughts and flooding. If the opposing trends are a consequence of a warming climate, it is reasonable to expect the contradictory trend to continue with an enhanced risk of flash flooding in coming decades in the region concerned. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.