气候变化领域集成服务门户(CCPortal): Polar Amplification as an Inherent Response of a Circulating Atmosphere: Results From the TRACMIP Aquaplanets

CCPortal

DOI	10.1029/2019GL086771
	Polar Amplification as an Inherent Response of a Circulating Atmosphere: Results From the TRACMIP Aquaplanets
	Russotto R.D.; Biasutti M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:6
英文摘要	In the Tropical Rain belts with an Annual cycle and Continent Model Intercomparison Project (TRACMIP) ensemble of aquaplanet climate model experiments, CO2-induced warming is amplified in the poles in 10 out of 12 models, despite the lack of sea ice. We attribute causes of this amplification by perturbing individual radiative forcing and feedback components in a moist energy balance model. We find a strikingly linear pattern of tropical versus polar warming contributions across models and processes, implying that polar amplification is an inherent consequence of diffusion of moist static energy by the atmosphere. The largest contributor to polar amplification is the instantaneous CO2 forcing, followed by the water vapor feedback and, for some models, cloud feedbacks. Extratropical feedbacks affect polar amplification more strongly, but even feedbacks confined to the tropics can cause polar amplification. Our results contradict studies inferring warming contributions directly from the meridional gradient of radiative perturbations, highlighting the importance of interactions between feedbacks and moisture transport for polar amplification. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric radiation; Carbon dioxide; Energy balance; Sandwich structures; Sea ice; Tropics; Climate feedbacks; Energy balance models; Meridional gradients; Model inter comparisons; Moist static energy; Polar amplifications; Radiative perturbation; Water vapor feedbacks; Climate models; carbon dioxide; climate modeling; energy balance; numerical model; radiative forcing; sea ice; warming; water vapor
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170544
作者单位	Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
推荐引用方式 GB/T 7714	Russotto R.D.,Biasutti M.. Polar Amplification as an Inherent Response of a Circulating Atmosphere: Results From the TRACMIP Aquaplanets[J],2020,47(6).
APA	Russotto R.D.,&Biasutti M..(2020).Polar Amplification as an Inherent Response of a Circulating Atmosphere: Results From the TRACMIP Aquaplanets.Geophysical Research Letters,47(6).
MLA	Russotto R.D.,et al."Polar Amplification as an Inherent Response of a Circulating Atmosphere: Results From the TRACMIP Aquaplanets".Geophysical Research Letters 47.6(2020).