气候变化领域集成服务门户(CCPortal): The efficiency of the Hadley cell response to wide variations in ocean heat transport

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DOI	10.1175/JCLI-D-19-0334.1
	The efficiency of the Hadley cell response to wide variations in ocean heat transport
	Rencurrel M.C.; Rose B.E.J.
发表日期	2020
ISSN	0894-8755
起始页码	1643
结束页码	1658
卷号	33 期号:5
英文摘要	The Hadley cell (HC) plays a key role in the climate response to variations in ocean heat transport (OHT). Increased OHT is characterized by both a robust slowdown of this overturning circulation, with consequent changes in cloudiness driving the climate response, and a compensating reduction in the atmospheric heat transport (AHT). Here a suite of slab-ocean aquaplanet GCM simulations is used to study the robustness of mechanisms driving changes inHC mass and energy transport across a wide range of idealized spatial patterns of OHT. The HC response is intrinsically related to both the spatial pattern of OHT and the dynamical mechanisms driving the slowdown of the cell. The reduced energy flux of the HC is associated with reductions in both the mass flux and the gross moist stability (GMS) of the cell in all cases. However, when OHT convergence patterns are confined to the subtropics and equatorward thereof (i.e., subtropical overturning cells), the circulation response is largely momentum-conserving in nature when compared to OHT convergence patterns that extend into the midlatitudes, resulting in a deformation of the anomalous streamfunction following angular momentum contours. The effects of this deformation are quantified through a simple, yet novel approach of splitting the streamfunction anomalies into their "speed" and "shape" components. The tilt of the outer branch of the streamfunction anomaly dampens the direct climate effects of the slowdown of the cell while enhancing the change in GMS, effectively decoupling the change in the energy flux from the slowdown. © 2020 American Meteorological Society.
英文关键词	Atmospheric movements; Cells; Clouds; Cytology; Deformation; Heat transfer; Tropics; Atmospheric heat; Climate response; Dynamical mechanisms; Mass and energy transport; Momentum conserving; Ocean heat transport; Overturning circulation; Spatial patterns; Climate change; angular momentum; atmospheric transport; energy flux; Hadley cell; heat transfer; overturn
语种	英语
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/171421
作者单位	Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States
推荐引用方式 GB/T 7714	Rencurrel M.C.,Rose B.E.J.. The efficiency of the Hadley cell response to wide variations in ocean heat transport[J],2020,33(5).
APA	Rencurrel M.C.,&Rose B.E.J..(2020).The efficiency of the Hadley cell response to wide variations in ocean heat transport.Journal of Climate,33(5).
MLA	Rencurrel M.C.,et al."The efficiency of the Hadley cell response to wide variations in ocean heat transport".Journal of Climate 33.5(2020).