4 results
Search Results
2. Influence of October Eurasian snow on winter temperature over Northeast China.
- Author
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Li, Huanlian, Wang, Huijun, and Jiang, Dabang
- Subjects
ATMOSPHERIC temperature ,SNOW & the environment ,ATMOSPHERIC circulation ,ATMOSPHERIC pressure ,ECOLOGY - Abstract
This paper addresses the interannual variation of winter air temperature over Northeast China and its connection to preceding Eurasian snow cover. The results show that there is a significant negative correlation between October Eurasian snow cover and following-winter air temperature over Northeast China. The snow cover located in eastern Siberia and to the northeast of Lake Baikal plays an important role in the winter air temperature anomaly. More (less) eastern Siberia snow in October can cause an atmospheric circulation anomaly pattern in which the atmospheric pressure is higher (lower) than normal in the polar region and lower (higher) in the northern mid-high latitudes. Due to the persistence of the eastern Siberia snow from October to the following winter, the winter atmospheric anomaly is favorable (unfavorable) to the widespread movement of cold air masses from the polar region toward the northern mid-high latitudes and, hence, lower (higher) temperature over Northeast China. Simultaneously, when the October snow cover is more (less), the SST in the northwestern Pacific is continuously lower (higher) as a whole; then, the Aleutian low and the East Asia trough are reinforced (weakened), favoring the lower (higher) temperature over Northeast China. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
3. A review of seasonal climate prediction research in China.
- Author
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Wang, Huijun, Fan, Ke, Sun, Jianqi, Li, Shuanglin, Lin, Zhaohui, Zhou, Guangqing, Chen, Lijuan, Lang, Xianmei, Li, Fang, Zhu, Yali, Chen, Hong, and Zheng, Fei
- Subjects
WEATHER forecasting ,CLIMATE change ,ATMOSPHERIC temperature ,ATMOSPHERIC circulation ,DISASTERS - Abstract
The ultimate goal of climate research is to produce climate predictions on various time scales. In China, efforts to predict the climate started in the 1930s. Experimental operational climate forecasts have been performed since the late 1950s, based on historical analog circulation patterns. However, due to the inherent complexity of climate variability, the forecasts produced at that time were fairly inaccurate. Only from the late 1980s has seasonal climate prediction experienced substantial progress, when the Tropical Ocean and Global Atmosphere project of the World Climate Research program (WCRP) was launched. This paper, following a brief description of the history of seasonal climate prediction research, provides an overview of these studies in China. Processes and factors associated with the climate variability and predictability are discussed based on the literature published by Chinese scientists. These studies in China mirror aspects of the climate research effort made in other parts of the world over the past several decades, and are particularly associated with monsoon research in East Asia. As the climate warms, climate extremes, their frequency, and intensity are projected to change, with a large possibility that they will increase. Thus, seasonal climate prediction is even more important for China in order to effectively mitigate disasters produced by climate extremes, such as frequent floods, droughts, and the heavy frozen rain events of South China. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
4. Precipitation pattern of the mid-Holocene simulated by a high-resolution regional climate model.
- Author
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Yu, Entao, Wang, Tao, Gao, Yongqi, and Xiang, Weiling
- Subjects
METEOROLOGICAL precipitation ,HOLOCENE Epoch ,ATMOSPHERIC models ,DROUGHTS ,ATMOSPHERIC circulation ,ATMOSPHERIC temperature - Abstract
Early proxy-based studies suggested that there potentially occurred a 'southern drought/northern flood' (SDNF) over East China in the mid-Holocene (from roughly 7000 to 5000 years before present). In this study, we used both global and regional atmospheric circulation models to demonstrate that the SDNF-namely, the precipitation increases over North China and decreases over the the lower reaches of the Yangtze River Valley-could have taken place in the mid-Holocene. We found that the SDNF in the mid-Holocene was likely caused by the lower SST in the Pacific. The lowered SST and the higher air temperature over mainland China increased the land-sea thermal contrast and, as a result, strengthened the East Asian summer monsoon and enhanced the precipitation over North China. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
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