DOI: 10.1175/JCLI-D-12-00783.1
Scopus记录号: 2-s2.0-84893874083
论文题名: Consistent trends in a modified climate extremes index in the United States, Europe, and Australia
作者: Gallant A.J.E. ; Karoly D.J. ; Gleason K.L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 4 起始页码: 1379
结束页码: 1394
语种: 英语
英文摘要: The utility of a combined modified climate extremes index (mCEI) is presented for monitoring coherent trends in multiple types of climate extremes across large regions. Its usefulness lies in its ability to distill complex spatiotemporal fields into a simple, flexible nonparametric index. Two versions of the mCEI are computed that incorporate changes in several annual- or daily-scale temperature-related and moisture-related extremes. Applying data from the contiguous United States, Europe, and Australia detects consistent and statistically significant increases in the spatial prevalence of climate extremes from 1950 to 2012. All three continental-scale regions show increasingly widespread warm annual- and daily-scale minimum and maximum temperature extremes, a decreasing spatial extent of cool annual- and daily-scale minimum and maximum temperature extremes, and increasing areas where the proportion of annual total precipitation falls on heavy-rain days. There were no statistically significant trends toward more widespread, annual-scale drought or moisture surplus in any region. The dependence of annual extremes on the frequency of daily-scale extremes is highlighted by the strong covariations between annual- and daily-scale extremes in all regions. By the nature of construction of the combined indices, the differences in the trends of the mCEI and daily-scale mCEI (dmCEI) suggest that extremes in more areas are changing primarily because of a shift of temperature and daily rainfall distributions toward warm extremes and heavy-rainfall extremes. © 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/50972
Appears in Collections: 气候变化事实与影响
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作者单位: School of Earth Sciences, University of Melbourne, Parkville, VIC, Australia; School of Geography and Environmental Science, Monash University, Clayton, VIC, Australia; National Climatic Data Center, Asheville, NC, United States
Recommended Citation:
Gallant A.J.E.,Karoly D.J.,Gleason K.L.. Consistent trends in a modified climate extremes index in the United States, Europe, and Australia[J]. Journal of Climate,2014-01-01,27(4)