The Mechanisms of Cloudiness Evolution Responsible for Equilibrium Climate Sensitivity in Climate Model INM-CM4-8

被引：17
|
作者：
Volodin, E. [1 ]
机构：
[1] Russian Acad Sci, Marchuk Inst Numer Math, Moscow, Russia
来源：
GEOPHYSICAL RESEARCH LETTERS | 2021年 / 48卷 / 24期
基金：
俄罗斯科学基金会;
关键词：
Climate sensitivity; radiation forcing; parameterization; cloudiness; SCHEME;
D O I：
10.1029/2021GL096204
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Current climate models demonstrate large discrepancy in equilibrium climate sensitivity (ECS). The effects of cloudiness parameterization changes on the ECS of the INM-CM4-8 climate model were investigated. This model shows the lowest ECS among CMIP6 models. Reasonable changes in the parameterization of the degree of cloudiness yielded ECS variability of 1.8-4.1 K in INM-CM4-8, which was more than half of the interval for the CMIP6 models. The three principal mechanisms responsible for the increased ECS were increased cloudiness dissipation in warmer climates due to the increased water vapor deficit in the non-cloud fraction of a cell, decreased cloudiness generation in the atmospheric boundary layer in warm climates, and the instantaneous cloud response to CO2 increases due to stratification changes.
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页数：9
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