globalchange  > 气候减缓与适应
DOI: 10.1002/joc.5420
论文题名:
West Africa climate extremes and climate change indices
作者: Barry A.A.; Caesar J.; Klein Tank A.M.G.; Aguilar E.; McSweeney C.; Cyrille A.M.; Nikiema M.P.; Narcisse K.B.; Sima F.; Stafford G.; Touray L.M.; Ayilari-Naa J.A.; Mendes C.L.; Tounkara M.; Gar-Glahn E.V.S.; Coulibaly M.S.; Dieh M.F.; Mouhaimouni M.; Oyegade J.A.; Sambou E.; Laogbessi E.T.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38
起始页码: e921
结束页码: e938
语种: 英语
英文关键词: climate change ; climate extremes ; daily precipitation ; daily temperature ; indices ; trends ; West Africa
Scopus关键词: Rain ; Climate extremes ; Daily precipitations ; Daily temperatures ; Indices ; Trends ; West Africa ; Climate change ; climate change ; diurnal variation ; extreme event ; precipitation assessment ; precipitation intensity ; temperature profile ; trend analysis ; warming ; Gambia ; West Africa
英文摘要: Observational analyses of changing climate extremes over the West Africa region have been limited by the availability of long and high-quality datasets. To help address this gap, a climate extremes indices workshop was held in the Gambia in December 2011 with participants from 14 West African countries. The resulting analysis utilized 15 annual indices derived from observed daily temperatures and 10 annual indices derived from observed daily precipitation. The analysis was conducted for 166 meteorological stations in 13 countries for 2 periods: 1960–2010 and 1981–2010. The analyses of trends in the annual mean temperature indices have identified statistically significant increases of 0.16 °C/decade and 0.28 °C/decade for mean annual maximum and mean annual minimum temperatures, respectively, averaged over all available land stations in the region during the last 50 years. The seasonal-temperature-related indices show significant patterns of warming in all seasons. The annual mean of daily minimum temperature has increased more than the annual mean of daily maximum temperature leading to a decreasing trend in the diurnal temperature range. Warm days and warm nights have become more frequent, and cold days and cold nights have become less frequent. The analyses of precipitation-based indices indicate spatially non-coherent changes throughout the study area with few statistically significant trends over the longer period. Exceptions to this are the simple daily intensity index and maximum 5-day precipitation, which show significant increasing regional trends over both the shorter and longer periods. Additionally, over the recent period (1981–2010) most of the precipitation related indices show significant trends towards wetter conditions. However, this period of increased rainfall follows a decade of significantly drier conditions in the region – it is not clear whether the recent upward trends reflect the ‘recovery’ from this long drought period or represents a long-term response to warming. © 2018 Royal Meteorological Society
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116964
Appears in Collections:气候减缓与适应

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作者单位: Centre for Climate Change (C3), Universitat Rovira i Virgili, Tarragona, Spain; Met Office Hadley Centre, Exeter, United Kingdom; Royal Netherlands Meteorological Institute, De Bilt, Netherlands; Direction Nationale de la Météorologie (DNM), Cotonou, Benin; Direction Générale de la Météorologie (DGM), Ouagadougou, Burkina Faso; Direction de la Météorologie Nationale (DMN), Abidjan, Cote d'Ivoire; Department of Water Resources (DWR), Banjul, Gambia; Ghana Meteorological Agency (GMet), Accra, Ghana; Institut National de la Météorologie (INM), Bissau, Guinea-Bissau; Direction Nationale de la Météorologie (DNM), Conakry, Guinea; Division of Meteorology, Liberia; Direction Nationale de Météorologie (DNM), Bamako, Mali; Office Nationale de la Météorologie (ONM), Nouakchott, Mauritania; Direction de la Météorologie Nationale (DMN), Niamey, Niger; Nigerian Meteorological Agency (NIMET), Lagos, Nigeria; Agence Nationale de la Météorologie du Sénégal (ANAMS), Dakar, Senegal; Direction Générale de Météorologie Nationale (DGMN), Lomé, Togo

Recommended Citation:
Barry A.A.,Caesar J.,Klein Tank A.M.G.,et al. West Africa climate extremes and climate change indices[J]. International Journal of Climatology,2018-01-01,38
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