BROWSE

Related Researcher

Author

Kang, Sarah M.
Climate Dynamics Lab
Research Interests
  • Climate change, ITCZ, Atmospheric general circulation, Polar amplification

ITEM VIEW & DOWNLOAD

Contribution of ocean overturning circulation to tropical rainfall peak in the Northern Hemisphere

Cited 9 times inthomson ciCited 7 times inthomson ci
Title
Contribution of ocean overturning circulation to tropical rainfall peak in the Northern Hemisphere
Author
Frierson, Dargan M.W.Hwang, Yen-TingFuckar, Neven S.Seager, RichardKang, Sarah M.Donohoe, AaronMaroon, Elizabeth A.Liu, XiaojuanBattisti, David S.
Keywords
INTERTROPICAL CONVERGENCE ZONE; EASTERN PACIFIC; SOUTHERN-OCEAN; MODEL; ITCZ; ATMOSPHERE; SYSTEM
Issue Date
201311
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE GEOSCIENCE, v.6, no.11, pp.940 - 944
Abstract
Rainfall in the tropics is largely focused in a narrow zonal band near the Equator, known as the intertropical convergence zone. On average, substantially more rain falls just north of the Equator. This hemispheric asymmetry in tropical rainfall has been attributed to hemispheric asymmetries in ocean temperature induced by tropical landmasses. However, the ocean meridional overturning circulation also redistributes energy, by carrying heat northwards across the Equator. Here, we use satellite observations of the Earth's energy budget, atmospheric reanalyses and global climate model simulations to study tropical rainfall using a global energetic framework. We show that the meridional overturning circulation contributes significantly to the hemispheric asymmetry in tropical rainfall by transporting heat from the Southern Hemisphere to the Northern Hemisphere, and thereby pushing the tropical rain band north. This northward shift in tropical precipitation is seen in global climate model simulations when ocean heat transport is included, regardless of whether continents are present or not. If the strength of the meridional overturning circulation is reduced in the future as a result of global warming, as has been suggested, precipitation patterns in the tropics could change, with potential societal consequences.
URI
Go to Link
DOI
http://dx.doi.org/10.1038/ngeo1987
ISSN
1752-0894
Appears in Collections:
UEE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

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

MENU