DOI: 10.1007/s00382-015-2906-5
Scopus记录号: 2-s2.0-84947609472
论文题名: Projected changes to winter temperature characteristics over Canada based on an RCM ensemble
作者: Jeong D.I. ; Sushama L. ; Diro G.T. ; Khaliq M.N.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 47, 期: 2017-05-06 起始页码: 1351
结束页码: 1366
语种: 英语
英文关键词: Canada
; Climate change
; Cold temperature extremes
; Regional climate model
英文摘要: Cold temperature and associated extremes often impact adversely human health and environment and bring disruptions in economic activities during winter over Canada. This study investigates projected changes in winter (December to March) period cold extreme days (i.e., cold nights, cold days, frost days, and ice days) and cold spells over Canada based on 11 regional climate model (RCM) simulations for the future 2040–2069 period with respect to the current 1970–1999 period. These simulations, available from the North American Regional Climate Change Assessment Program, were obtained with six different RCMs, when driven by four different Atmosphere–Ocean General Circulation Models, under the Special Report on Emissions Scenarios A2 scenario. Based on the reanalysis boundary conditions, the RCM simulations reproduce spatial patterns of observed mean values of the daily minimum and maximum temperatures and inter-annual variability of the number of cold nights over different Canadian climatic regions considered in the study. A comparison of current and future period simulations suggests decreases in the frequency of cold extreme events (i.e., cold nights, cold days and cold spells) and in selected return levels of maximum duration of cold spells over the entire study domain. Important regional differences are noticed as the simulations generally indicate smaller decreases in the characteristics of extreme cold events over western Canada compared to the other regions. The analysis also suggests an increase in the frequency of midwinter freeze–thaw events, due mainly to a decrease in the number of frost days and ice days for all Canadian regions. Especially, densely populated southern and coastal Canadian regions will require in depth studies to facilitate appropriate adaptation strategies as these regions are clearly expected to experience large increases in the frequency of freeze–thaw events. © 2015, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53553
Appears in Collections: 过去全球变化的重建
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作者单位: Centre ESCER (Étude et Simulation du Climat à l’Échelle Régionale), Université du Québec à Montréal, 201 Ave. President-Kennedy, Montreal, QC, Canada; National Research Council, Ottawa, ON, Canada
Recommended Citation:
Jeong D.I.,Sushama L.,Diro G.T.,et al. Projected changes to winter temperature characteristics over Canada based on an RCM ensemble[J]. Climate Dynamics,2016-01-01,47(2017-05-06)