DOI: 10.1175/JCLI-D-17-0402.1
Scopus记录号: 2-s2.0-85043677914
论文题名: The importance of ocean dynamical feedback for understanding the impact of mid-high-latitude warming on tropical precipitation change
作者: Yoshimori M. ; Abe-Ouchi A. ; Tatebe H. ; Nozawa T. ; Oka A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 6 起始页码: 2417
结束页码: 2434
语种: 英语
英文关键词: Climate change
; Climate models
; Hadley circulation
; Hydrologic cycle
Scopus关键词: Atmospheric movements
; Climate models
; Heat transfer
; Oceanography
; Tropics
; Atmosphere ocean general circulation models
; Atmospheric circulation
; Future climate projections
; Hadley circulation
; Hydrologic cycles
; Meridional displacements
; Meridional overturning circulations
; Tropical precipitation
; Climate change
; atmospheric general circulation model
; climate change
; climate modeling
; feedback mechanism
; Hadley cell
; heat transfer
; hydrological cycle
; latitude
; Northern Hemisphere
; oceanic general circulation model
; precipitation (climatology)
; Southern Hemisphere
; warming
英文摘要: It has been shown that asymmetric warming between the Northern and Southern Hemisphere extratropics induces a meridional displacement of tropical precipitation. This shift is believed to be due to the extra energy transported from the differentially heated hemisphere through changes in the Hadley circulation. Generally, the column-integrated energy flux in the mean meridional overturning circulation follows the direction of the upper, relatively dry branch, and tropical precipitation tends to be intensified in the hemisphere with greater warming. This framework was originally applied to simulations that did not include ocean dynamical feedback, but was recently extended to take the ocean heat transport change into account. In the current study, an atmosphere-ocean general circulation model applied with a regional nudging technique is used to investigate the impact of extratropical warming on tropical precipitation change under realistic future climate projections. It is shown that warming at latitudes poleward of 40° causes the northward displacement of tropical precipitation from October to January. Warming at latitudes poleward of 60° alone has a much smaller effect. This change in the tropical precipitation is largely explained by the atmospheric moisture transport caused by changes in the atmospheric circulation. The larger change in ocean heat transport near the equator, relative to the atmosphere, is consistent with the extended energy framework. The current study provides a complementary dynamical framework that highlights the importance of midlatitude atmospheric eddies and equatorial ocean upwelling, where the atmospheric eddy feedback modifies the Hadley circulation resulting in the northward migration of precipitation and the ocean dynamical feedback damps the northward migration from the equator. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111633
Appears in Collections: 气候减缓与适应
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作者单位: Faculty of Environmental Earth Science, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, Japan; Arctic Research Center, Hokkaido University, Sapporo, Japan; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan; Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan; National Institute of Polar Research, Tachikawa, Japan; Okayama University, Okayama, Japan
Recommended Citation:
Yoshimori M.,Abe-Ouchi A.,Tatebe H.,et al. The importance of ocean dynamical feedback for understanding the impact of mid-high-latitude warming on tropical precipitation change[J]. Journal of Climate,2018-01-01,31(6)