DOI: 10.1175/JCLI-D-17-0856.1
Scopus记录号: 2-s2.0-85050250007
论文题名: Exploring the climatic response to wide variations in ocean heat transport on an aquaplanet
作者: Rencurrel M.C. ; Rose B.E.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 16 起始页码: 6299
结束页码: 6318
语种: 英语
英文关键词: Cloud radiative effects
; Energy transport
; General circulation models
; Hadley circulation
; Paleoclimate
Scopus关键词: Atmospheric movements
; Boundary layers
; Global warming
; Heat transfer
; Tropics
; Cloud radiative effects
; Energy transport
; General circulation model
; Hadley circulation
; Paleoclimates
; Climate models
; air-sea interaction
; atmospheric dynamics
; atmospheric general circulation model
; boundary layer
; climate modeling
; cloud radiative forcing
; energy balance
; global warming
; Hadley cell
; heat transfer
; paleoclimate
; temperature gradient
英文摘要: The climatic impact of ocean heat transport (OHT) is studied in a series of idealized aquaplanet climate model experiments. OHT is prescribed through a simple geometrical formula spanning a wide variety of amplitudes and meridional extents. Calculations with a comprehensive GCM are compared against a simple diffusive energy balance model (EBM). The GCM response differs from the EBM in several important ways that illustrate linkages between atmospheric dynamics and radiative processes. Increased OHT produces global mean warming at a rate of 2 K PW-1 OHT across 30° and a strong reduction in meridional temperature gradient. The tropics remain nearly isothermal despite locally large imposed ocean heat uptake. The warmer climate features reduced equatorial convection, moister subtropics, reduced cloudiness, and partial but incomplete compensation in atmospheric heat transport. Many of these effects are linked to a weakened Hadley circulation. Both the warming pattern and hydrological changes differ strongly from those driven by CO2. Similar results are found at 0° and 23.45° obliquity. It is argued that clouds, rather than clear-sky radiative processes, are principally responsible for the global warming and tropical thermostat effects. Cloud changes produce warming in all cases, but the degree of warming depends strongly on the meridional extent of OHT. The strongest warming occurs in response to mid- to high-latitude OHT convergence, which produces widespread loss of boundary layer clouds. Temperature responses to increased OHT are quantitatively reproduced in the EBM by imposing GCM-derived cloud radiative effects as additional forcing. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111422
Appears in Collections: 气候减缓与适应
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作者单位: Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States
Recommended Citation:
Rencurrel M.C.,Rose B.E.J.. Exploring the climatic response to wide variations in ocean heat transport on an aquaplanet[J]. Journal of Climate,2018-01-01,31(16)