气候变化领域集成服务门户(CCPortal): Investigating the Role of Cloud-Radiation Interactions in Subseasonal Tropical Disturbances

CCPortal

DOI	10.1029/2019GL086817
	Investigating the Role of Cloud-Radiation Interactions in Subseasonal Tropical Disturbances
	Benedict J.J.; Medeiros B.; Clement A.C.; Olson J.G.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:9
英文摘要	Cloud locking, a method that prescribes cloud properties for radiative tendency calculations, is traditionally used to explore climate feedbacks, but here is applied novelly to investigate cloud-radiation interaction (CRI) impacts on subseasonal tropical variability. The approach minimizes mean state differences between control (CRI active) and experimental simulations (CRI disabled) of the Community Earth System Model. Disabling CRI weakens amplitudes of the Madden-Julian oscillation (MJO) by 10–35% and equatorial Rossby waves by 10–30% yet strengthens Kelvin waves by 10–40%. MJO weakening results from suppressed radiation-convection positive feedbacks and increased gross moist stability. Kelvin waves strengthen from reduced convective inhibition and reduced radiative damping on temperature variance. The results are compared to a recently proposed theory that describes a continuum of tropical disturbances. MJO survival, when its primary maintenance mechanism (CRI) is eliminated, stresses the importance of advection and surface flux processes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Gravity waves; Tropics; Cloud-radiation interactions; Convective inhibition; Earth system model; Equatorial Rossby waves; Experimental simulations; Madden-Julian oscillation; Temperature variance; Tropical disturbances; Climatology; advection; cloud radiative forcing; convection; damping; Kelvin wave; Madden-Julian oscillation; surface flux
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/170398
作者单位	Rosenstiel School of Marine and Atmospheric Science, University of Miami, Coral Gables, FL, United States; Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Benedict J.J.,Medeiros B.,Clement A.C.,et al. Investigating the Role of Cloud-Radiation Interactions in Subseasonal Tropical Disturbances[J],2020,47(9).
APA	Benedict J.J.,Medeiros B.,Clement A.C.,&Olson J.G..(2020).Investigating the Role of Cloud-Radiation Interactions in Subseasonal Tropical Disturbances.Geophysical Research Letters,47(9).
MLA	Benedict J.J.,et al."Investigating the Role of Cloud-Radiation Interactions in Subseasonal Tropical Disturbances".Geophysical Research Letters 47.9(2020).