IOCAS-IR  > 海洋环流与波动重点实验室
Representing surface wind stress response to mesoscale SST perturbations in western coast of South America using Tikhonov regularization method
Cui Chaoran1,2,3; Zhang Rong-Hua1,2,3,4; Wang Hongna1,2,4; Wei Yanzhou5
2020-05-01
Source PublicationJOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN2096-5508
Volume38Issue:3Pages:679-694
Corresponding AuthorZhang Rong-Hua(rzhang@qdio.ac.cn)
AbstractInteraction between mesoscale perturbations of sea surface temperature (SSTmeso) and wind stress (WSmeso) has great influences on the ocean upwelling system and turbulent mixing in the atmospheric boundary layer. Using daily Quik-SCAT wind speed data and AMSR-E SST data, SSTmeso and WSmeso fields in the western coast of South America are extracted by using a locally weighted regression method (LOESS). The spatial patterns of SSTmeso and WSmeso indicate strong mesoscale SST-wind stress coupling in the region. The coupling coefficient between SSTmeso and WSmeso is about 0.009 5 N/(m(2.)degrees C) in winter and 0.008 2 N/(m(2.)degrees C) in summer. Based on mesoscale coupling relationships, the mesoscale perturbations of wind stress divergence (Div(WSmeso)) and curl (Curl (WSmeso)) can be obtained from the SST gradient perturbations, which can be further used to derive wind stress vector perturbations using the Tikhonov regularization method. The computational examples are presented in the western coast of South America and the patterns of the reconstructed WSmeso are highly consistent with SSTmeso, but the amplitude can be underestimated significantly. By matching the spatially averaged maximum standard deviations of reconstructed WSmeso magnitude and observations, a reasonable magnitude of WSmeso can be obtained when a rescaling factor of 2.2 is used. As current ocean models forced by prescribed wind cannot adequately capture the mesoscale wind stress response, the empirical wind stress perturbation model developed in this study can be used to take into account the feedback effects of the mesoscale wind stress-SST coupling in ocean modeling. Further applications are discussed for taking into account the feedback effects of the mesoscale coupling in large-scale climate models and the uncoupled ocean models.
Keywordmesoscale air-sea coupling Tikhonov's regularization method western coast of South America
DOI10.1007/s00343-019-9042-8
Indexed BySCI
Language英语
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectLimnology ; Oceanography
WOS IDWOS:000536606000008
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/167570
Collection海洋环流与波动重点实验室
Corresponding AuthorZhang Rong-Hua
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266000, Peoples R China
5.Minist Nat Resources, State Key Lab Satellite Ocean Environm Dynam, Inst Oceanog 2, Hangzhou 310012, Peoples R China
First Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences;  Center for Ocean Mega-Science, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences;  Center for Ocean Mega-Science, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Cui Chaoran,Zhang Rong-Hua,Wang Hongna,et al. Representing surface wind stress response to mesoscale SST perturbations in western coast of South America using Tikhonov regularization method[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2020,38(3):679-694.
APA Cui Chaoran,Zhang Rong-Hua,Wang Hongna,&Wei Yanzhou.(2020).Representing surface wind stress response to mesoscale SST perturbations in western coast of South America using Tikhonov regularization method.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,38(3),679-694.
MLA Cui Chaoran,et al."Representing surface wind stress response to mesoscale SST perturbations in western coast of South America using Tikhonov regularization method".JOURNAL OF OCEANOLOGY AND LIMNOLOGY 38.3(2020):679-694.
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