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8. Changes in Ugandan Climate Rainfall at the Village and Forest Level

Author

Ssentongo, Paddy, Muwanguzi, Abraham J. B., Eden, Uri, Sauer, Timothy, Bwanga, George, Kateregga, Geoffrey, Aribo, Lawrence, Ojara, Moses, Mugerwa, Wilberforce Kisamba, and Schiff, Steven J.

Subjects
Physics - Atmospheric and Oceanic Physics
Abstract

In 2013, the US National Oceanographic and Atmospheric Agency refined the historical rainfall estimates over the African Continent and produced the African Rainfall Climate version 2.0 (ARC2) estimator. ARC2 offers a nearly complete record of daily rainfall estimates since 1983 at 0.1 x 0.1 degree resolution. Despite short-term anomalies in twice-yearly rainy season intensities in Uganda, we identify an overall decrease in average rainfall of about 12% during the past 34 years. Spatiotemporally, these decreases are greatest in agricultural regions of central and western Uganda, but are also reflective of rainfall decreases in the gorilla habitat within the Bwindi Forest in Southwest Uganda. The findings carry significant implications for agriculture, food security, and wildlife habitat., Comment: 19 pages, 5 figures

Published
2017

20. Hyperspectral remote sensing to quantify the flowering phenology of winter wheat

Author

Rui Li, Ojara Moses. A, Zhen Zhang, Jun Li, Yunsheng Lou, and Li Ma

Subjects
Chemistry, Phenology, 010401 analytical chemistry, Winter wheat, Climate change, Hyperspectral imaging, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, Analytical Chemistry, Remote sensing (archaeology), Climatology, Vegetation Index, 0210 nano-technology, Spectroscopy
Abstract

Flowering phenology, as a sensitive bio-indicator to climate change, has been attracting increasing concern. However, less information is available so far for quantifying flowering phenological sta...

Published
2019

25. Characterization of Meteorological Drought and Pluvial Scenarios over Kenya, East Africa

Author

AYUGI, Brian, Tan, Guirong, Rouyun, Niu, Zeyao, Dong, Ojara, Moses, Mumo, Lucia, Babaousmail, Hassen, and Ongoma, Victor

Subjects
atmospheric_science
Abstract

This work examines drought and wet events based on Standardized Precipitation-Evapotranspiration Index (SPEI) over Kenya from 1981 to 2016. Spatiotemporal analysis of dry and wet events is conducted for 3 and 12-month SPEI. The drought incidences were observed during the period 1984, 1987, 2000, 2006, 2009, 2015, and 2016 for SPEI-3 whilst the SPEI-12 demonstrated the manifestation of drought during the year 2000 and 2006. SPEI clearly shows that the wettest period, 1997 and 1998 that coincide with the El Nino event in both time steps. SPEI -3 shows a reduction in moderate drought events while severe and extreme cases were on increase towards the end of the twentieth century. Conversely, SPEI-12 depicts an overall increase in severe drought occurrence over the study location with observed intensity of -1.54 and cumulative frequency of 64 months during the study period. The trend of wet events is upwards in the western and central highlands while the rest of the regions show increase in dry events during the study period. Moreover, moderate dry/wet events predominate whilst extreme events occur least frequent across all grid cells. It is apparent that the study area experiences mild extreme dry events in both categories although moderately severe dry events dominate most parts of the study area. High intensity and frequency of drought is noted in SPEI-3 while least occurrences of extreme events are recorded in SPEI-12. Although drought event prevails across the study area, there is evidence of extreme flood conditions over the recent decades. These findings form a good basis for next step of research that will look at projection of droughts over the study area based on regional climate models.

Published
2020

34. Changes in Ugandan Climate Rainfall at the Village and Forest Level

Author

Ssentongo, Paddy, primary, Muwanguzi, Abraham J. B., additional, Eden, Uri, additional, Sauer, Timothy, additional, Bwanga, George, additional, Kateregga, Geoffrey, additional, Aribo, Lawrence, additional, Ojara, Moses, additional, Mugerwa, Wilberforce Kisamba, additional, and Schiff, Steven J., additional

Published
2018
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