globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-11-00547.1
Scopus记录号: 2-s2.0-84875000061
论文题名:
Ocean heat transport and water vapor greenhouse in a warm equable climate: A new look at the low gradient paradox
作者: Rose B.E.J.; Ferreira D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期:6
起始页码: 2117
结束页码: 2136
语种: 英语
Scopus关键词: Atmospheric compensation ; Convective adjustments ; Convective precipitation ; Global mean surface temperature ; Mid-latitude storms ; Ocean heat transport ; Poleward energy transport ; Poleward heat transport ; Atmospheric temperature ; Greenhouses ; Heat transfer ; Poles ; Sensitivity analysis ; Storms ; Tropics ; Troposphere ; Climate models ; climate change ; general circulation model ; global warming ; greenhouse effect ; heat transfer ; water vapor
英文摘要: The authors study the role of ocean heat transport (OHT) in the maintenance of a warm, equable, ice-free climate. An ensemble of idealized aquaplanetGCMcalculations is used to assess the equilibrium sensitivity of global mean surface temperature (T) and its equator-to-pole gradient (ΔT) to variations in OHT, prescribed through a simple analytical formula representing export out of the tropics and poleward convergence. Lowlatitude OHT warms the mid- to high latitudes without cooling the tropics; T increases by 1°C and DT decreases by 2.6°C for every 0.5-PW increase in OHT across 30° latitude. This warming is relatively insensitive to the detailed meridional structure of OHT. It occurs in spite of near-perfect atmospheric compensation of large imposed variations in OHT: the total poleward heat transport is nearly fixed. The warming results from a convective adjustment of the extratropical troposphere. Increased OHT drives a shift from large-scale to convective precipitation in the midlatitude storm tracks. Warming arises primarily from enhanced greenhouse trapping associated with convective moistening of the upper troposphere. Warming extends to the poles by atmospheric processes even in the absence of high-latitude OHT. A new conceptual model for equable climates is proposed, in which OHT plays a key role by driving enhanced deep convection in the midlatitude storm tracks. In this view, the climatic impact of OHT depends on its effects on the greenhouse properties of the atmosphere, rather than its ability to increase the total poleward energy transport. © 2013 American Meteorological Society.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51953
Appears in Collections:气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States

Recommended Citation:
Rose B.E.J.,Ferreira D.. Ocean heat transport and water vapor greenhouse in a warm equable climate: A new look at the low gradient paradox[J]. Journal of Climate,2013-01-01,26(6)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Rose B.E.J.]'s Articles
[Ferreira D.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Rose B.E.J.]'s Articles
[Ferreira D.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Rose B.E.J.]‘s Articles
[Ferreira D.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.