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Summer upwelling and thermal fronts in the northwestern South China Sea: Observational analysis of two mesoscale mapping surveys
Jing, Zhiyou; Qi, Yiquan; Du, Yan; Zhang, Shuwen; Xie, Lingling; jingzhiyou@scsio.ac.cn
2015
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
卷号120期号:3页码:1993-2006
摘要Persistent coastal upwelling and upwelling-induced thermal fronts in the northwestern South China Sea are investigated using satellite measurements, two intensive mesoscale mapping surveys and three bottom-mounted ADCPs. The results indicate that pronounced surface cooling and upwelling-related fronts with a width of 20-50 km occur around Hainan Island and persist through the summer upwelling season. Driven by the prevailing southwesterly monsoon, the subsurface cooling band is approximate to 6 degrees C colder than the water offshore of the East Coast, where the thermal gradients are generally more than 0.1 degrees C/km. The cold and nutrient-rich coastal water is identified to be derived primarily from the deep water of the outer shelf. At the same time, the spatial structure of the upwelling and thermal front, as well as the upwelling-related coastal currents, is significantly regulated by wind forcing. A prominent lagged correlation between the moored temperature records and alongshore wind stress is detected in the East Coast. The correlation coefficient is -0.8 with the temperature lagging behind wind stress by 2.2 days, indicating that the cooling band off the East Coast is dominated mostly by the alongshore southwesterly monsoon during the upwelling season.
部门归属[Jing, Zhiyou; Qi, Yiquan; Du, Yan] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China; [Zhang, Shuwen; Xie, Lingling] Guangdong Ocean Univ, Coll Ocean & Meteorol, Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Zhanjiang, Peoples R China ; LTO
关键词Upwelling Thermal Front Field Observation South China Sea
学科领域Oceanography
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/14998
专题热带海洋环境国家重点实验室(LTO)
通讯作者jingzhiyou@scsio.ac.cn
推荐引用方式
GB/T 7714		 Jing, Zhiyou,Qi, Yiquan,Du, Yan,et al. Summer upwelling and thermal fronts in the northwestern South China Sea: Observational analysis of two mesoscale mapping surveys[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2015,120(3):1993-2006.
APA Jing, Zhiyou,Qi, Yiquan,Du, Yan,Zhang, Shuwen,Xie, Lingling,&jingzhiyou@scsio.ac.cn.(2015).Summer upwelling and thermal fronts in the northwestern South China Sea: Observational analysis of two mesoscale mapping surveys.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,120(3),1993-2006.
MLA Jing, Zhiyou,et al."Summer upwelling and thermal fronts in the northwestern South China Sea: Observational analysis of two mesoscale mapping surveys".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 120.3(2015):1993-2006.
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