Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2020.105112 |
Projections of future meteorological drought events under representative concentration pathways (RCPs) of CMIP5 over Kenya, East Africa | |
Guirong Tan, Brian Ayugi, Hamida Ngoma, Victor Ongoma | |
2020-06-20 | |
发表期刊 | Atmospheric Research |
出版年 | 2020 |
英文摘要 | Understanding future evolution of drought scenario across localized domains remains an imperative process in bid to adapt tailor suit innovative solutions to drought risks and their impacts. The present study examines drought events by characterizing the trend, intensity, severity and frequency based on Standardized Precipitation Index (SPI), over Kenya, East Africa for near future (2010–2039), mid-century (2040–2069), and late century (2070–2100). The study utilizes Multi-model mean ensemble (MME) of five selected regional climate models (RCMs). Further, the models were bias corrected based on a quantile mapping bias corrected algorithm in order to minimize possible bias for accurate projections. The changes in annual and seasonal precipitation over Kenya is examined in order to associate with changes in drought occurrence. Results demonstrate positive shift, indicating an increase in projected rainfall change during all the three timescales. Projections of possible future meteorological drought events under RCPs scenario over study locale was conducted using SPI. The results demonstrate relatively better performance of biased corrected MME derived from Rossby Centre regional climate model (RCA4) in simulating drought indices over the Kenya. The MME projections for drought duration show an increase in moderate drought incidences with fewer incidences of extreme events across the RCP4.5 and 8.5 respectively. However, the duration of occurrences varies from one region to another with most hotspots located around northeastern sides of the country. Examination of projected changes in drought frequency and severity depict an occurrence of severe to extreme drought incidences that are expected to intensify during the near future time slice while overall projections show that more wet scenarios is depicted, with fewer cases of drought expected to occur during mid and towards end of the century of projection period. The study calls for enactment of appropriate mitigation measures to cope with possible scenarios of drought risks over Kenya in the future. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/276499 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Guirong Tan, Brian Ayugi, Hamida Ngoma, Victor Ongoma. Projections of future meteorological drought events under representative concentration pathways (RCPs) of CMIP5 over Kenya, East Africa[J]. Atmospheric Research,2020. |
APA | Guirong Tan, Brian Ayugi, Hamida Ngoma, Victor Ongoma.(2020).Projections of future meteorological drought events under representative concentration pathways (RCPs) of CMIP5 over Kenya, East Africa.Atmospheric Research. |
MLA | Guirong Tan, Brian Ayugi, Hamida Ngoma, Victor Ongoma."Projections of future meteorological drought events under representative concentration pathways (RCPs) of CMIP5 over Kenya, East Africa".Atmospheric Research (2020). |
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