Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.4938 |
Analysis of long-term dry and wet conditions over Nigeria | |
Oguntunde, Philip G.1,2; Lischeid, Gunnar1; Abiodun, Babatunde J.3; Dietrich, Ottfried1 | |
2017-07-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2017 |
卷号 | 37期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Nigeria; South Africa |
英文摘要 | Information on trends and changes in moisture conditions over a region can help policymakers to develop strategies for water resources and disaster risk management. In this study, the spatiotemporal variation of moisture indices and their annual trends in Nigeria were investigated. Thornthwaite moisture index (MI), the standardized precipitation index (SPI) and the standardized precipitation-evapotranspiration index (SPEI) were computed for 1951-2014 period. Mann-Kendall trend and Sen's slope tests were used to examine the existence of temporal and spatial changes in these indices. MI decreased with increasing latitude and values ranged from -86 in the extreme north to +62 in the eastern part of the Niger Delta. A total of 73.4% of the landscape is under conditions where water supply is generally below the evaporative demand and only 26.6% of the area falls within wet sub-humid and humid regimes. Significant downward trends were observed for all the moisture indices in most of the zones. In general, negative trends were observed in 98.2% of the landscape for MI, 96.7% for SPI and 98.2% for SPEI, showing drying tendencies over Nigeria. Between 40 and 50% of the land area is manifesting persistent shift towards aridity. Observed trends in MI is strongly correlated with that of SPI (r = 0.805) and SPEI (r = 0.715) and correlation of 0.886 was found between changes in SPI and SPEI. Rainfall generally showed higher and significant correlations with MI and slopes of all moisture indices. This information could help policymakers to develop appropriate coping and mitigation strategies for the most vulnerable areas. |
英文关键词 | moisture indices evapotranspiration precipitation climate change trend analysis |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404854600005 |
WOS关键词 | MOISTURE INDEX ; CLIMATE-CHANGE ; WEST-AFRICA ; RIVER-BASIN ; DROUGHT ; VARIABILITY ; TRENDS ; PRECIPITATION ; CESSATION ; RAINFALL |
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/37056 |
专题 | 气候变化 |
作者单位 | 1.Leibniz Ctr Agr Landscape Res, Inst Landscape Hydrol, Muncheberg, Germany; 2.Fed Univ Technol Akure, Dept Agr & Environm Engn, Akure, Nigeria; 3.Univ Cape Town, Dept Environm & Geog Sci, Rondebosch, South Africa |
推荐引用方式 GB/T 7714 | Oguntunde, Philip G.,Lischeid, Gunnar,Abiodun, Babatunde J.,et al. Analysis of long-term dry and wet conditions over Nigeria[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37(9). |
APA | Oguntunde, Philip G.,Lischeid, Gunnar,Abiodun, Babatunde J.,&Dietrich, Ottfried.(2017).Analysis of long-term dry and wet conditions over Nigeria.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37(9). |
MLA | Oguntunde, Philip G.,et al."Analysis of long-term dry and wet conditions over Nigeria".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37.9(2017). |
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