Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aacc4c |
Distinguishing southern Africa precipitation response by strength of El Nino events and implications for decision-making | |
Pomposi, Catherine1; Funk, Chris1,2; Shukla, Shraddhanand1; Harrison, Laura1; Magadzire, Tamuka1,3 | |
2018-07-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Botswana |
英文摘要 | December-February precipitation in southern Africa during recent El Nino events is studied by distinguishing circulation and precipitation responses during strong and moderate-to-weak events. We find that while both strong and moderate-to-weak El Nino events tend to dry southern Africa, the pattern and magnitude of precipitation anomalies in the region are different, with strong El Nino events resulting in rainfall deficits often less than -0.88 standardized units and deficits of only about half that for the moderate-to-weak case. Additionally, the likelihood of southern Africa receiving less than climatologic precipitation is approximately 80% for strong El Nino events compared to just over 60% for moderate-to-weak El Nino. Strong El Nino events are found to substantially disrupt onshore moisture transports from the Indian Ocean and increase geopotential heights within the Angola Low. Since El Nino is the most predictable component of the climate system that influences southern Africa precipitation, the information provided by this assessment of the likelihood of dry conditions can serve to benefit early warning systems. |
英文关键词 | El Nino precipitation early warning southern Africa |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000437429100001 |
WOS关键词 | INTERANNUAL RAINFALL VARIABILITY ; SST DIPOLE EVENTS ; INDIAN-OCEAN ; SUMMER PRECIPITATION ; PART I ; OSCILLATION ; ENSO ; CLIMATE ; ANOMALIES ; PATTERNS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/14845 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Santa Barbara, Dept Geog, Climate Hazards Grp, Santa Barbara, CA 93106 USA; 2.US Geol Survey, Ctr Earth Resources Observat & Sci EROS, Garretson, SD USA; 3.Famine Early Warning Syst Network, Gaborone, Botswana |
推荐引用方式 GB/T 7714 | Pomposi, Catherine,Funk, Chris,Shukla, Shraddhanand,et al. Distinguishing southern Africa precipitation response by strength of El Nino events and implications for decision-making[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(7). |
APA | Pomposi, Catherine,Funk, Chris,Shukla, Shraddhanand,Harrison, Laura,&Magadzire, Tamuka.(2018).Distinguishing southern Africa precipitation response by strength of El Nino events and implications for decision-making.ENVIRONMENTAL RESEARCH LETTERS,13(7). |
MLA | Pomposi, Catherine,et al."Distinguishing southern Africa precipitation response by strength of El Nino events and implications for decision-making".ENVIRONMENTAL RESEARCH LETTERS 13.7(2018). |
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