气候变化领域集成服务门户(CCPortal): Quantifying Key Mechanisms That Contribute to the Deviation of the Tropical Warming Profile From a Moist Adiabat

CCPortal

DOI	10.1029/2020GL089136
	Quantifying Key Mechanisms That Contribute to the Deviation of the Tropical Warming Profile From a Moist Adiabat
	Miyawaki O.; Tan Z.; Shaw T.A.; Jansen M.F.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	Climate models project tropical warming is amplified aloft relative to the surface in response to increased CO2. Here we show moist adiabatic adjustment overpredicts the multimodel mean 300 hPa temperature response by 16.6–25.3% across the CMIP5 model hierarchy. We show three mechanisms influence overprediction: climatological large-scale circulation, direct effect of increased CO2, and convective entrainment. Accounting for the presence of a climatological large-scale circulation and the direct effect of CO2 reduces the CMIP5 multimodel mean overprediction by 0.7–7.2% and 2.8–3.9%, respectively, but does not eliminate it. To quantify the influence of entrainment, we vary the Tokioka parameter in aquaplanet simulations. When entrainment is decreased by decreasing the Tokioka parameter from 0.1 to 0, overprediction decreases by 9.6% and 10.4% with and without a large-scale circulation, respectively. The sensitivity of overprediction to climatological entrainment rate in the aquaplanet mostly follows the predictions of zero-buoyancy bulk-plume and spectral-plume models. ©2020. The Authors.
英文关键词	Carbon dioxide; Tropics; Entrainment rates; Large-scale circulation; Model hierarchy; Multi-model; Plume model; Temperature response; Climate models; adiabatic process; atmospheric circulation; carbon dioxide; CMIP; parameterization; temperature effect; temperature profile; warming
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/169589
作者单位	Department of the Geophysical Sciences, University of Chicago, Chicago, IL, United States; Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States
推荐引用方式 GB/T 7714	Miyawaki O.,Tan Z.,Shaw T.A.,et al. Quantifying Key Mechanisms That Contribute to the Deviation of the Tropical Warming Profile From a Moist Adiabat[J],2020,47(20).
APA	Miyawaki O.,Tan Z.,Shaw T.A.,&Jansen M.F..(2020).Quantifying Key Mechanisms That Contribute to the Deviation of the Tropical Warming Profile From a Moist Adiabat.Geophysical Research Letters,47(20).
MLA	Miyawaki O.,et al."Quantifying Key Mechanisms That Contribute to the Deviation of the Tropical Warming Profile From a Moist Adiabat".Geophysical Research Letters 47.20(2020).