DOI: 10.1175/JCLI-D-17-0566.1
Scopus记录号: 2-s2.0-85049738297
论文题名: Contrasting impacts of radiative forcing in the Southern Ocean versus southern tropics on ITCZ position and energy transport in one GFDL climate model
作者: Xiang B. ; Zhao M. ; Ming Y. ; Yu W. ; Kang S.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 14 起始页码: 5609
结束页码: 5628
语种: 英语
英文关键词: Convection
; Eddies
; Energy transport
; Hadley circulation
; Meridional overturning circulation
; Ocean circulation
Scopus关键词: Atmospheric movements
; Atmospheric radiation
; Budget control
; Climate models
; Heat convection
; Surface waters
; Tropics
; Eddies
; Energy transport
; Hadley circulation
; Meridional overturning circulations
; Ocean circulation
; Oceanography
; atmospheric convection
; climate modeling
; eddy
; Hadley cell
; intertropical convergence zone
; meridional circulation
; overturn
; radiative forcing
; sea surface temperature
; temperature gradient
; top of atmosphere
; Southern Ocean
英文摘要: Most current climate models suffer from pronounced cloud and radiation biases in the Southern Ocean (SO) and in the tropics. Using one GFDL climate model, this study investigates the migration of the intertropical convergence zone (ITCZ) with prescribed top-of-the-atmosphere (TOA) shortwave radiative heating in the SO (50°-80°S) versus the southern tropics (ST; 0°-20°S).Results demonstrate that the ITCZposition response to the ST forcing is twice as strong as the SO forcing, which is primarily driven by the contrasting sea surface temperature (SST) gradient over the tropics; however, themechanism for the formation of the SST pattern remains elusive. Energy budget analysis reveals that the conventional energetic constraint framework is inadequate in explaining the ITCZshift in these two perturbed experiments. For both cases, the anomalousHadley circulation does not contribute to transport the imposed energy from the Southern Hemisphere to the Northern Hemisphere, given a positive mean gross moist stability in the equatorial region. Changes in the cross-equatorial atmospheric energy are primarily transported by atmospheric transient eddieswhen the anomalous ITCZshift is most pronounced during December-May. The partitioning of energy transport between the atmosphere and ocean shows latitudinal dependence: the atmosphere and ocean play an overall equivalent role in transporting the imposed energy for the extratropical SO forcing, while for the ST forcing, the imposed energy is nearly completely transported by the atmosphere. This contrast originates from the different ocean heat uptake and also the different meridional scale of the anomalous ocean circulation. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111486
Appears in Collections: 气候减缓与适应
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作者单位: NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; University Corporation for Atmospheric Research, Boulder, CO, United States; Center for Ocean and Climate Research, First Institute of Oceanography, State Oceanic Administration, Qingdao, China; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea
Recommended Citation:
Xiang B.,Zhao M.,Ming Y.,et al. Contrasting impacts of radiative forcing in the Southern Ocean versus southern tropics on ITCZ position and energy transport in one GFDL climate model[J]. Journal of Climate,2018-01-01,31(14)