DOI: 10.1007/s00382-012-1379-z
Scopus记录号: 2-s2.0-84874948824
论文题名: Mid-twenty-first century climate change in the Central United States. Part II: Climate change processes
作者: Patricola C.M. ; Cook K.H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 40, 期: 2017-03-04 起始页码: 569
结束页码: 583
语种: 英语
英文关键词: Climate change
; Diurnal cycle
; Great Plains
; Great Plains low-level jet
; Precipitation
; Regional climate model
英文摘要: Ensemble regional model simulations over the central US with 30-km resolution are analyzed to investigate the physical processes of projected precipitation changes in the mid-twenty-first century under greenhouse gas forcing. An atmospheric moisture balance is constructed, and changes in the diurnal cycle are evaluated. Wetter conditions over the central US in April and May occur most strongly in the afternoon and evening, supported primarily by moisture convergence by transient eddy activity, indicating enhanced daytime convection. In June, increased rainfall over the northern Great Plains is strongest from 0000 to 0600 LT. It is supported by positive changes in stationary meridional moisture convergence related to a strengthening of the GPLLJ accompanied by an intensification of the western extension of the North Atlantic subtropical high. In the Midwest, decreased rainfall is strongest at 1500 LT and 0000 LT. Both a suppression of daytime convection as well as changes in the zonal flow in the GPLLJ exit region are important. Future drying over the northern Great Plains in summer is triggered by weakened daytime convection, and persists throughout August and September when a deficit in soil moisture develops and land-atmosphere feedbacks become increasingly important. © 2012 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54932
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, 14853, United States; Jackson School of Geosciences, The University of Texas at Austin, 1 University Station, C1100, Austin, TX, 78712, United States; Department of Atmospheric Sciences, Texas A and M University, 3150 TAMU, College Station, TX, 77843-3150, United States
Recommended Citation:
Patricola C.M.,Cook K.H.. Mid-twenty-first century climate change in the Central United States. Part II: Climate change processes[J]. Climate Dynamics,2013-01-01,40(2017-03-04)