DOI: 10.1007/s00382-016-3418-7
Scopus记录号: 2-s2.0-84992731362
论文题名: Projections of 21st century climate of the Columbia River Basin
作者: Rupp D.E. ; Abatzoglou J.T. ; Mote P.W.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 49, 期: 2017-05-06 起始页码: 1783
结束页码: 1799
语种: 英语
英文关键词: CMIP5
; Columbia River Basin
; Fidelity
; Projections
; RCP4.5
; RCP8.5
; Variability
; Variance partition
英文摘要: Simulations from 35 global climate models (GCMs) in the Coupled Model Intercomparison Project Phase 5 provide projections of 21st century climate in the Columbia River Basin under scenarios of anthropogenic activity given by Representative Concentration Pathways (RCP4.5 and RCP8.5). The multi-model ensemble 30-year mean annual temperature increases by 2.8 °C (5.0 °C) by late 21st century under RCP4.5 (RCP8.5) over the 1979–1990 baseline, with 18% (24%) more warming in summer. By late 21st century, annual precipitation increases by 5% (8%), with an 8% (14%) winter increase and a 4% (10%) summer decrease, but because some models project changes of opposite sign, confidence in these sign changes is lower than those for temperature. Four questions about temperature and precipitation changes were addressed: (1) How and why do climate projections vary seasonally? (2) Is interannual variability in seasonal temperature and precipitation projected to change? (3) What explains the large inter-model spread in the projections? (4) Do projected changes in climate depend on model skill? Changes in precipitation and temperature vary seasonally as a result of changes in large-scale circulation and regional surface energy budget, respectively. Interannual temperature variability decreases slightly during the cool seasons and increases in summer, while interannual precipitation variability increases in all seasons. The magnitude of regional warming is linked to models’ global climate sensitivity, whereas internal variability dominates the inter-model spread of precipitation changes. Lastly, GCMs that better reproduce historical climate tend to project greater warming and larger precipitation increases, though these results depend on the evaluation method. © 2016, Springer-Verlag Berlin Heidelberg. 资助项目: NIFA, National Institute of Food and Agriculture
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53074
Appears in Collections: 过去全球变化的重建
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作者单位: Oregon Climate Change Research Institute, College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; Department of Geography, University of Idaho, Moscow, ID, United States
Recommended Citation:
Rupp D.E.,Abatzoglou J.T.,Mote P.W.. Projections of 21st century climate of the Columbia River Basin[J]. Climate Dynamics,2017-01-01,49(2017-05-06)