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DOI | 10.1175/JCLI-D-17-0566.1 |
Contrasting Impacts of Radiative Forcing in the Southern Ocean versus Southern Tropics on ITCZ Position and Energy Transport in One GFDL Climate Model | |
Xiang, Baoqiang1,2; Zhao, Ming1; Ming, Yi1; Yu, Weidong3,4; Kang, Sarah M.5 | |
2018-07-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:14页码:5609-5628 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China; South Korea |
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 degrees-80 degrees S) versus the southern tropics (ST; 0 degrees-20 degrees S). Results demonstrate that the ITCZ position 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, the mechanism for the formation of the SST pattern remains elusive. Energy budget analysis reveals that the conventional energetic constraint framework is inadequate in explaining the ITCZ shift in these two perturbed experiments. For both cases, the anomalous Hadley 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 eddies when the anomalous ITCZ shift 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. |
英文关键词 | Convection Eddies Energy transport Hadley circulation Meridional overturning circulation Ocean circulation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435537300004 |
WOS关键词 | INTERTROPICAL CONVERGENCE ZONE ; ATMOSPHERIC HEAT-TRANSPORT ; GENERAL-CIRCULATION MODELS ; LAST GLACIAL MAXIMUM ; SEASONAL CYCLE ; PRECIPITATION ; PACIFIC ; WINDS ; SSTS ; SIMULATIONS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20526 |
专题 | 气候变化 |
作者单位 | 1.NOAA, Geophys Fluid Dynam Lab, Princeton, NJ 08540 USA; 2.Univ Corp Atmospher Res, Boulder, CO 80301 USA; 3.State Ocean Adm, Inst Oceanog 1, Ctr Ocean & Climate Res, Qingdao, Peoples R China; 4.Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao, Peoples R China; 5.Ulsan Natl Inst Sci & Technol, Sch Urban & Environm Engn, Ulsan, South Korea |
推荐引用方式 GB/T 7714 | Xiang, Baoqiang,Zhao, Ming,Ming, Yi,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,2018,31(14):5609-5628. |
APA | Xiang, Baoqiang,Zhao, Ming,Ming, Yi,Yu, Weidong,&Kang, Sarah M..(2018).Contrasting Impacts of Radiative Forcing in the Southern Ocean versus Southern Tropics on ITCZ Position and Energy Transport in One GFDL Climate Model.JOURNAL OF CLIMATE,31(14),5609-5628. |
MLA | Xiang, Baoqiang,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".JOURNAL OF CLIMATE 31.14(2018):5609-5628. |
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