globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-13-00423.1
Scopus记录号: 2-s2.0-84905186568
论文题名:
Development of a high-resolution gridded daily meteorological dataset over sub-Saharan Africa: Spatial analysis of trends in climate extremes
作者: Chaney N.W.; Sheffield J.; Villarini G.; Wood E.F.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期:15
起始页码: 5815
结束页码: 5835
语种: 英语
Scopus关键词: Time series ; Water resources ; Africa ; Data assimilation ; Extreme events ; Maximum and minimum temperatures ; Mean annual precipitation ; Statistical significance ; Temporal inhomogeneities ; Trends ; Quality control ; climate change ; data assimilation ; data set ; drought ; extreme event ; meteorology ; spatial analysis ; spatial resolution ; time series ; trend analysis ; Sahel [Sub-Saharan Africa]
英文摘要: Assessing changes in the frequency and intensity of extreme meteorological events and their impact on water resources, agriculture, and infrastructure is necessary to adequately prepare and adapt to future change. This is a challenge in data-sparse regions such as sub-Saharan Africa, where a lack of high-density and temporally consistent long-term in situ measurements complicates the analysis. To address this, a temporally homogenous and high-temporal- and high-spatial-resolution meteorological dataset is developed over sub-Saharan Africa (5°S-25°N), covering the time period between 1979 and 2005. It is developed by spatially downscaling the National Centers for Environmental Prediction-National Center for Atmospheric Research (NCEP-NCAR) reanalysis to a 0.1° spatial resolution, detecting and correcting for temporal inhomogeneities, and by removing random errors and biases by assimilating quality-controlled and gap-filled Global Summary of the Day (GSOD) in situ measurements. The dataset is then used to determine the statistical significance and magnitude of changes in climate extremes between 1979 and 2005. The results suggest a shift in the distribution of daily maximum and minimum temperatures toward a warmer mean with a faster increase in warm than cold events. Changes in the mean annual precipitation and heavy rainfall events are significant only in regions affected by the Sahel droughts of the 1970s and 1980s. © 2014 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51423
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作者单位: Princeton University, Princeton, NJ, United States; Iowa Institute of Hydraulic Research-Hydroscience and Engineering, University of Iowa, Iowa City, IA, United States; Princeton University, Princeton, NJ, United States

Recommended Citation:
Chaney N.W.,Sheffield J.,Villarini G.,et al. Development of a high-resolution gridded daily meteorological dataset over sub-Saharan Africa: Spatial analysis of trends in climate extremes[J]. Journal of Climate,2014-01-01,27(15)
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