文献类型：期刊文献

英文题名：Summer upwelling and thermal fronts in the northwestern South China Sea: Observational analysis of two mesoscale mapping surveys

作者：Jing, Zhiyou[1];Qi, Yiquan[1];Du, Yan[1];Zhang, Shuwen[2];Xie, Lingling[2]

机构：[1]Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China;[2]Guangdong Ocean Univ, Coll Ocean & Meteorol, Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Zhanjiang, Peoples R China

年份：2015

卷号：120

期号：3

起止页码：1993

外文期刊名：JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS

收录：SCI-EXPANDED(收录号：WOS:000353900000030)、、Scopus(收录号：2-s2.0-85027943119)、WOS

基金：We thank the anonymous reviewers and the Editor, Eric Des Barton, for their valuable contributions that allowed us to improve the paper substantially. The authors thank GHRSST-PP (http://ghrsst-pp.metoffice.com/), DAAC/NASA (http://oceandata.sci.gsfc.nasa.gov/), and NCDC/NOAA (http://www.ncdc.noaa.gov/thredds/OceanWinds.html) for providing a suite of new satellite data and reanalysis products. This study is supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA11020201 and XDA11010203), the Knowledge Innovation Program of the Chinese Academy of Sciences (KZCX2-EW-204), and National Natural Science Foundation of China (U1033003, 41176011, 41276022, 41230962, and 41206010). Zhiyou Jing is also sponsored by "Youth Innovation Promotion Association" CAS (LTOZZ1202 and LTOZZ1304).

语种：英文

外文关键词：upwelling; thermal front; field observation; South China Sea

外文摘要：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.