气候变化领域集成服务门户(CCPortal): The partitioning of meridional heat transport from the last glacial maximum to CO2 quadrupling in coupled climate models

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DOI	10.1175/JCLI-D-19-0797.1
	The partitioning of meridional heat transport from the last glacial maximum to CO2 quadrupling in coupled climate models
	Donohoe A.; Armour K.C.; Roe G.H.; Battisti D.S.; Hahn L.
发表日期	2020
ISSN	0894-8755
起始页码	4141
结束页码	4165
卷号	33 期号:10
英文摘要	Meridional heat transport (MHT) is analyzed in ensembles of coupled climate models simulating climate states ranging from the Last Glacial Maximum (LGM) to quadrupled CO2. MHT is partitioned here into atmospheric (AHT) and implied oceanic (OHT) heat transports. In turn, AHT is partitioned into dry and moist energy transport by the meridional overturning circulation (MOC), transient eddy energy transport (TE), and stationary eddy energy transport (SE) using only monthly averaged model output that is typically archived. In all climate models examined, the maximum total MHT (AHT 1 OHT) is nearly climate-state invariant, except for a modest (4%, 0.3 PW) enhancement of MHT in the Northern Hemisphere (NH) during the LGM. However, the partitioning of MHT depends markedly on the climate state, and the changes in partitioning differ considerably among different climate models. In response to CO2 quadrupling, poleward implied OHT decreases, while AHT increases by a nearly compensating amount. The increase in annual-mean AHT is a smooth function of latitude but is due to a spatially inhomogeneous blend of changes in SE and TE that vary by season. During the LGM, the increase in wintertime SE transport in the NH midlatitudes exceeds the decrease in TE resulting in enhanced total AHT. Total AHT changes in the Southern Hemisphere (SH) are not significant. These results suggest that the net top-of-atmosphere radiative constraints on total MHT are relatively invariant to climate forcing due to nearly compensating changes in absorbed solar radiation and outgoing longwave radiation. However, the partitioning of MHT depends on detailed regional and seasonal factors. © 2020 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	Carbon dioxide; Climate change; Glacial geology; Heat transfer; Absorbed solar radiations; Coupled climate model; Last Glacial Maximum; Meridional heat transports; Meridional overturning circulations; Outgoing longwave radiation; Southern Hemisphere; Spatially inhomogeneous; Climate models; carbon dioxide; carbon emission; climate change; climate modeling; heat flow; last glaciation; longwave radiation; regional climate
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/171321
作者单位	Polar Science Center, Applied Physics Laboratory, University of Washington, Seattle, WA, United States; School of Oceanography and Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States
推荐引用方式 GB/T 7714	Donohoe A.,Armour K.C.,Roe G.H.,et al. The partitioning of meridional heat transport from the last glacial maximum to CO2 quadrupling in coupled climate models[J],2020,33(10).
APA	Donohoe A.,Armour K.C.,Roe G.H.,Battisti D.S.,&Hahn L..(2020).The partitioning of meridional heat transport from the last glacial maximum to CO2 quadrupling in coupled climate models.Journal of Climate,33(10).
MLA	Donohoe A.,et al."The partitioning of meridional heat transport from the last glacial maximum to CO2 quadrupling in coupled climate models".Journal of Climate 33.10(2020).