气候变化领域集成服务门户(CCPortal): Radiative and dynamic controls on atmospheric heat transport over different planetary rotation rates

CCPortal

DOI	10.1175/JCLI-D-20-0533.1
	Radiative and dynamic controls on atmospheric heat transport over different planetary rotation rates
	Cox T.; Armour K.C.; Roe G.H.; Donohoe A.; Frierson D.M.W.
发表日期	2021
ISSN	08948755
起始页码	3543
结束页码	3554
卷号	34 期号:9
英文摘要	Atmospheric heat transport is an important piece of our climate system, yet we lack a complete theory for its magnitude or changes. Atmospheric dynamics and radiation play different roles in controlling the total atmospheric heat transport (AHT) and its partitioning into components associated with eddies and mean meridional circulations. This work focuses on two specific controls: a radiative one, namely atmospheric radiative temperature tendencies, and a dynamic one, the planetary rotation rate. We use an idealized gray radiation model to employ a novel framework to lock the radiative temperature tendency and total AHT to climatological values, even while the rotation rate is varied. This setup allows for a systematic study of the effects of radiative tendency and rotation rate on AHT. We find that rotation rate controls the latitudinal extent of the Hadley cell and the heat transport efficiency of eddies. Both the rotation rate and radiative tendency influence the strength of the Hadley cell and the strength of equator-pole energy differences that are important for AHT by eddies. These two controls do not always operate independently and can reinforce or dampen each other. In addition, we examine how individual AHT components, which vary with latitude, sum to a total AHT that varies smoothly with latitude. At slow rotation rates the mean meridional circulation is most important in ensuring total AHT varies smoothly with latitude, while eddies are most important at rotation rates similar to, and faster than, those of Earth. © 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Eddies; Energy transport; Hadley circulation; Mass fluxes/transport; Meridional overturning circulation; Radiation budgets
语种	英语
scopus关键词	Atmospheric movements; Clouds; Heat transfer; Atmospheric dynamics; Dynamic controls; Energy differences; Meridional circulation; Planetary rotation; Radiation modeling; Radiative temperature; Systematic study; Rotation
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178619
作者单位	Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; School of Oceanography, Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States; Polar Science Center and Applied Physics Laboratory, University of Washington, Seattle, WA, United States
推荐引用方式 GB/T 7714	Cox T.,Armour K.C.,Roe G.H.,et al. Radiative and dynamic controls on atmospheric heat transport over different planetary rotation rates[J],2021,34(9).
APA	Cox T.,Armour K.C.,Roe G.H.,Donohoe A.,&Frierson D.M.W..(2021).Radiative and dynamic controls on atmospheric heat transport over different planetary rotation rates.Journal of Climate,34(9).
MLA	Cox T.,et al."Radiative and dynamic controls on atmospheric heat transport over different planetary rotation rates".Journal of Climate 34.9(2021).