气候变化领域集成服务门户(CCPortal): Terrestrial evaporation and global climate: Lessons from northland, a planet with a hemispheric continent

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DOI	10.1175/JCLI-D-20-0452.1
	Terrestrial evaporation and global climate: Lessons from northland, a planet with a hemispheric continent
	Lagu M.M.; Pietschnig M.; Ragen S.; Smith T.A.; Battisti D.S.
发表日期	2021
ISSN	08948755
起始页码	2253
结束页码	2276
卷号	34 期号:6
英文摘要	Motivated by the hemispheric asymmetry of land distribution on Earth, we explore the climate of Northland, a highly idealized planet with a Northern Hemisphere continent and a Southern Hemisphere ocean. The climate of Northland can be separated into four distinct regions: The Southern Hemisphere ocean, the seasonally wet tropics, the midlatitude desert, and the Great Northern Swamp. We evaluate how modifying land surface properties on Northland drives changes in temperatures, precipitation patterns, the global energy budget, and atmospheric dynamics. We observe a surprising response to changes in land surface evaporation, where suppressing terrestrial evaporation in Northland cools both land and ocean. In previous studies, suppressing terrestrial evaporation has been found to lead to local warming by reducing latent cooling of the land surface. However, reduced evaporation can also decrease atmospheric water vapor, reducing the strength of the greenhouse effect and leading to large-scale cooling. We use a set of idealized climate model simulations to show that suppressing terrestrial evaporation over Northern Hemisphere continents of varying size can lead to either warming or cooling of the land surface, depending on which of these competing effects dominates.We find that a combination of total land area and contiguous continent size controls the balance between local warming from reduced latent heat flux and large-scale cooling from reduced atmospheric water vapor. Finally, we demonstrate how terrestrial heat capacity, albedo, and evaporation all modulate the location of the ITCZ both over the continent and over the ocean. © 2021 American Meteorological Society. All rights reserved.
英文关键词	Atmosphere-land interaction; Climate models; Climatology; Energy transport; Evaporation; General circulation models; Water vapor
语种	英语
scopus关键词	Budget control; Earth (planet); Evaporation; Greenhouse effect; Heat flux; Moisture; Oceanography; Specific heat; Surface measurement; Water vapor; Atmospheric dynamics; Atmospheric water vapor; Climate model simulations; Global energy budget; Hemi-spheric asymmetries; Land surface properties; Northern Hemispheres; Precipitation patterns; Climate models; air-soil interaction; atmospheric general circulation model; climate modeling; climatology; evaporation; global climate; Southern Hemisphere; terrestrial environment; water vapor
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/178688
作者单位	Department of Earth and Planetary Science, University of California Berkeley, Berkeley, CA, United States; University of Saskatchewan Coldwater Lab, Canmore, AB, Canada; Department of Mathematics, University of Exeter, Exeter, United Kingdom; School of Oceanography, University of Washington, Seattle, WA, United States; Oden Institute for Computational Engineering and Sciences, The University of Texas at Austin, Austin, TX, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States
推荐引用方式 GB/T 7714	Lagu M.M.,Pietschnig M.,Ragen S.,et al. Terrestrial evaporation and global climate: Lessons from northland, a planet with a hemispheric continent[J],2021,34(6).
APA	Lagu M.M.,Pietschnig M.,Ragen S.,Smith T.A.,&Battisti D.S..(2021).Terrestrial evaporation and global climate: Lessons from northland, a planet with a hemispheric continent.Journal of Climate,34(6).
MLA	Lagu M.M.,et al."Terrestrial evaporation and global climate: Lessons from northland, a planet with a hemispheric continent".Journal of Climate 34.6(2021).