Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5530 |
Assessing recovery and change in West Africa's rainfall regime from a 161-year record | |
Nicholson, Sharon E.1; Fink, Andreas H.2; Funk, Chris3,4 | |
2018-08-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:10页码:3770-3786 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | The Sahel region is known for the multi-decadal occurrence of severe drought that commenced in the late 1960s. A still open question is whether or not the region's rainfall has returned to normal. This paper provides a compelling answer to that question by examining the longest and most comprehensive gauge series for the region ever published. It extends from 1854 to 2014 and is based on 602 gauge records. A comparative series for the Guinea Coast region to the south is also presented, as the two regions collectively provide insight into the long-term variability of the West African monsoon. In contrast to many previous studies, here the question of recovery and regime change is not restricted to the core of the Sahelian rainy season (July-September), but is separately discussed also for the coastal phase (April-May), transition phase (June), Sahelian phase (July-September) and the second transition phase (October-November) of the West African monsoon. These analyses suggest that full recovery from the droughts of the 1970s and 1980s has not occurred that a major change in the rainfall regime occurred around 1968 and that since that time large-scale teleconnections have also changed markedly. The shift post-1968 is evident in all phases of the monsoon except the coastal phase, in which a change to drier conditions occurred a decade later. Overall, recovery has been greater in the east than in the west, creating a change in the climatological east-west rainfall gradient. The drier post-1968 conditions appear to be associated with a general weakening of the intensity of the West African monsoon and only a small southwards displacement of the rainfall maximum. These changes have strong implications for the future of this region and for seasonal prediction. |
英文关键词 | climatic variability drought Guinea Coast inter-annual variability multi-decadal variability rainfall Sahel teleconnections |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000440826000002 |
WOS关键词 | SURFACE CIRCULATION PATTERNS ; SAHARAN WEATHER ANOMALIES ; INTERANNUAL VARIABILITY ; DROUGHT CONTINUES ; SAHELIAN DROUGHT ; PRECIPITATION ; FLUCTUATIONS ; TELECONNECTIONS ; TRENDS ; DECADE |
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/36943 |
专题 | 气候变化 |
作者单位 | 1.Florida State Univ, Tallahassee, FL 32306 USA; 2.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Karlsruhe, Germany; 3.US Geol Survey, Earth Resources Observat & Sci Ctr, Santa Barbara, CA USA; 4.Univ Calif Santa Barbara, Climate Hazards Grp, Santa Barbara, CA 93106 USA |
推荐引用方式 GB/T 7714 | Nicholson, Sharon E.,Fink, Andreas H.,Funk, Chris. Assessing recovery and change in West Africa's rainfall regime from a 161-year record[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(10):3770-3786. |
APA | Nicholson, Sharon E.,Fink, Andreas H.,&Funk, Chris.(2018).Assessing recovery and change in West Africa's rainfall regime from a 161-year record.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(10),3770-3786. |
MLA | Nicholson, Sharon E.,et al."Assessing recovery and change in West Africa's rainfall regime from a 161-year record".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.10(2018):3770-3786. |
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