气候变化领域集成服务门户(CCPortal): Fast adjustment versus slow SST-mediated response of daily precipitation statistics to abrupt 4xCO2

CCPortal

DOI	10.1007/s00382-020-05522-w
	Fast adjustment versus slow SST-mediated response of daily precipitation statistics to abrupt 4xCO2
	Douville H.; John A.
发表日期	2021
ISSN	0930-7575
卷号	56 期号:2021-03-04
英文摘要	Projected changes in global to regional precipitation remain highly model-dependent and are driven by both fast atmospheric adjustments and slower ocean-mediated responses to increasing concentrations of greenhouse gases. Understanding the relative influence of these multiple drivers is one of the main objectives of the Cloud Feedback Model Intercomparison Project. Here the focus is on the daily precipitation response to an abrupt quadrupling of atmospheric CO2, as simulated by the CNRM-CM6-1 global climate model. Extended atmosphere-only experiments with prescribed sea surface temperature (SST) are used to decompose the precipitation changes into separate responses to uniform SST warming, the pattern of SST anomalies, as well as fast radiative and physiological CO2 effects. The uniform SST warming dominates the global and regional changes in annual mean and annual maximum daily precipitation intensity. In contrast, the annual mean number of wet days and the annual maximum of consecutive dry days show a strong fast adjustment. They are also sensitive to the SST warming pattern that strongly influences changes in large-scale circulation. The increase in daily precipitation intensity drives the global-mean magnitude of the annual precipitation change. In contrast, the response of wet day frequency shapes the geographical distribution and interannual variability of the annual mean precipitation, especially in the subtropics, and is more sensitive to changes in near-surface relative humidity than in the total water column over land. Although the annual precipitation response does not seem highly sensitive to the base state, these results deserve further investigation and model intercomparison within CFMIP. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Climate change; Drivers; Extremes; Frequency; Intensity; Precipitation
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183403
作者单位	Centre National de Recherches Météorologiques, Université de Toulouse, Météo-France, CNRS, 42 Avenue Gaspard Coriolis, Toulouse Cedex 01, 31057, France
推荐引用方式 GB/T 7714	Douville H.,John A.. Fast adjustment versus slow SST-mediated response of daily precipitation statistics to abrupt 4xCO2[J],2021,56(2021-03-04).
APA	Douville H.,&John A..(2021).Fast adjustment versus slow SST-mediated response of daily precipitation statistics to abrupt 4xCO2.Climate Dynamics,56(2021-03-04).
MLA	Douville H.,et al."Fast adjustment versus slow SST-mediated response of daily precipitation statistics to abrupt 4xCO2".Climate Dynamics 56.2021-03-04(2021).