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学科主题: Oceanography
题名: Mechanisms of the disappearance of sea surface temperature fronts in the subtropical North Pacific Ocean
作者: Qiu, CH ; Kawamura, H ; Mao, HB ; Wu, JX
通讯作者: wujiaxue@mail.sysu.edu.cn
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
发表日期: 2014
卷: 119, 期:7, 页:4389-4398
收录类别: sci
部门归属: [Qiu, Chunhua ; Wu, Jiaxue] Sun Yat Sen Univ, Sch Marine Sci, Ctr Coastal Ocean Sci & Technol, Guangzhou 510275, Guangdong, Peoples R China ; [Qiu, Chunhua ; Kawamura, Hiroshi] Tohoku Univ, Grad Sch Sci, Ctr Atmospher & Ocean Studies, Sendai, Miyagi 980, Japan ; [Mao, Huabin] Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China
项目归属: LTO
资助者: National Basic Research Program of China [2013CB956502]; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences [LTO1302]; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA11010202]
摘要: The disappearance mechanisms of subtropical sea surface temperature (SST) fronts occurring from May to August were examined quantitatively using a simple mixed-layer model. Weekly 2.5 degrees data sets were matched up between satellite and in situ observations, including cloud-free SST from Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) and Global Temperature and Salinity Profile Program (GTSPP) data. A 1.5 mixed-layer model used in this study assumed that the temporal variation of the SST gradient was controlled by the resultant effect among the net heat flux, temperature advection (including Ekman and geostrophic), and the temperature entrainment at the bottom of the mixed layer. The net heat flux was found to provide a dominant contribution to the weakening of the SST front (decreasing SST gradient), while the temperature advection and the bottom entrainment were relatively weak. Decomposition of the net heat flux revealed that the meridional gradient of the latent heat flux is a direct factor in the weakening of the SST front, while the shortwave radiation could have indirect effects. The meridional gradient of the latent heat flux is induced by southerly winds, which in turn causes the weakening and disappearance of the SST front. Comparison of weekly and monthly averaged SST gradient modeling results with in situ observations demonstrated that the weekly SST gradient in the model agrees closely with AMSR-E observations, but there was a large difference between the monthly SST gradient in the model and in the observations.
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WOS记录号: WOS:000340415500022
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10532
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Qiu, CH; Kawamura, H; Mao, HB; Wu, JX.Mechanisms of the disappearance of sea surface temperature fronts in the subtropical North Pacific Ocean,JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2014,119(7):4389-4398
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