Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-019-04829-7 |
A classification of synoptic weather patterns linked to extreme rainfall over the Limpopo River Basin in southern Africa | |
Rapolaki, Ramontsheng S.1,2; Blamey, Ross C.1; Hermes, Juliet C.1,2; Reason, Chris J. C.1 | |
2019-08-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:2265-2279 |
文章类型 | Article |
语种 | 英语 |
国家 | South Africa |
英文摘要 | In the last few decades, the Limpopo River Basin (LRB) has experienced a number of extreme rainfall events which were responsible for considerable socio-economic and environmental impacts. Most of the population here is poor and dependent on rain-fed agriculture. In order to better understand these events over the LRB, CHIRPS, 0.05 degrees gridded rainfall data are used to identify the daily extreme events, analyse their interannual variability and examine relationships with large scale climate modes over the 1981-2016 period. Analysis of the top 20 events suggests a pattern with rainfall generally decreasing from the eastern to western parts of the basin. Typically, the highest rainfall amounts occur over the regions where there are steep topographical gradients between the mountainous regions of northeastern South Africa and the Mozambican floodplains. Almost half of the top 200 extreme events are associated with tropical extra-tropical cloud bands (48%), with tropical low-pressure systems (28%), Mesoscale Convective Systems (14%), and cut-off lows (10%) in the mid-upper atmosphere, also making sizeable contributions. The monthly distribution of the events showed that most of the events occurred during the late summer months (January-March) when tropical lows and cloud bands are more common. On interannual time-scales, most of the summers with above average number of events coincide with La Nina conditions and, to lesser extent, a positive subtropical South Indian Ocean Dipole. |
英文关键词 | Extreme rainfall events Limpopo River Basin Cloud bands Tropical low-pressure ENSO |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000475558800059 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; MESOSCALE CONVECTIVE COMPLEXES ; WATER-VAPOR TRANSPORT ; SST DIPOLE EVENTS ; INDIAN-OCEAN ; SUMMER RAINFALL ; PART I ; TROPICAL ATLANTIC ; HEAVY RAINFALL ; DRY SUMMERS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/185453 |
专题 | 气候变化 |
作者单位 | 1.Univ Cape Town, Dept Oceanog, Private Bag X3, ZA-7701 Rondebosch, South Africa; 2.SAEON Egagasini Node, Private Bag X2, ZA-8012 Cape Town, South Africa |
推荐引用方式 GB/T 7714 | Rapolaki, Ramontsheng S.,Blamey, Ross C.,Hermes, Juliet C.,et al. A classification of synoptic weather patterns linked to extreme rainfall over the Limpopo River Basin in southern Africa[J]. CLIMATE DYNAMICS,2019,53:2265-2279. |
APA | Rapolaki, Ramontsheng S.,Blamey, Ross C.,Hermes, Juliet C.,&Reason, Chris J. C..(2019).A classification of synoptic weather patterns linked to extreme rainfall over the Limpopo River Basin in southern Africa.CLIMATE DYNAMICS,53,2265-2279. |
MLA | Rapolaki, Ramontsheng S.,et al."A classification of synoptic weather patterns linked to extreme rainfall over the Limpopo River Basin in southern Africa".CLIMATE DYNAMICS 53(2019):2265-2279. |
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