DOI: 10.1002/2016MS000715
Scopus记录号: 2-s2.0-84995687626
论文题名: Impacts of cloud superparameterization on projected daily rainfall intensity climate changes in multiple versions of the Community Earth System Model
作者: Kooperman G ; J ; , Pritchard M ; S ; , Burt M ; A ; , Branson M ; D ; , Randall D ; A
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2016
卷: 8, 期: 4 起始页码: 1727
结束页码: 1750
语种: 英语
英文关键词: Cams
; Climate change
; Climate models
; Climatology
; Earth (planet)
; Rain
; Tropics
; Wind effects
; Community atmosphere model
; Extreme precipitation
; High order statistics
; Horizontal resolution
; Intertropical convergence zone
; Madden-Julian oscillation
; Rainfall intensity
; Superparameterization
; Precipitation (meteorology)
; atmospheric modeling
; climate change
; climate modeling
; cloud cover
; intertropical convergence zone
; Madden-Julian oscillation
; precipitation (climatology)
; precipitation intensity
; rainfall
英文摘要: Changes in the character of rainfall are assessed using a holistic set of statistics based on rainfall frequency and amount distributions in climate change experiments with three conventional and superparameterized versions of the Community Atmosphere Model (CAM and SPCAM). Previous work has shown that high-order statistics of present-day rainfall intensity are significantly improved with superparameterization, especially in regions of tropical convection. Globally, the two modeling approaches project a similar future increase in mean rainfall, especially across the Inter-Tropical Convergence Zone (ITCZ) and at high latitudes, but over land, SPCAM predicts a smaller mean change than CAM. Changes in high-order statistics are similar at high latitudes in the two models but diverge at lower latitudes. In the tropics, SPCAM projects a large intensification of moderate and extreme rain rates in regions of organized convection associated with the Madden Julian Oscillation, ITCZ, monsoons, and tropical waves. In contrast, this signal is missing in all versions of CAM, which are found to be prone to predicting increases in the amount but not intensity of moderate rates. Predictions from SPCAM exhibit a scale-insensitive behavior with little dependence on horizontal resolution for extreme rates, while lower resolution (∼2°) versions of CAM are not able to capture the response simulated with higher resolution (∼1°). Moderate rain rates analyzed by the “amount mode” and “amount median” are found to be especially telling as a diagnostic for evaluating climate model performance and tracing future changes in rainfall statistics to tropical wave modes in SPCAM. © 2016. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75864
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Earth System Science, University of California, Irvine, CA, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
Recommended Citation:
Kooperman G,J,, Pritchard M,et al. Impacts of cloud superparameterization on projected daily rainfall intensity climate changes in multiple versions of the Community Earth System Model[J]. Journal of Advances in Modeling Earth Systems,2016-01-01,8(4)