文献类型：期刊文献

英文题名：Multiple mechanisms for chlorophyll a concentration variations in coastalupwelling regions: a case study east of Hainan Island in the South China Sea

作者：Li, Junyi[1,2,3];Li, Min[1];Wang, Chao[1];Zheng, Quanan[1,4];Xu, Ying[3];Zhang, Tianyu[1];Xie, Lingling[1]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang, Peoples R China;[2]Coll Ocean & Meteorol, Key Lab Climate Sources & Environm Continent Shelf, Zhanjiang, Peoples R China;[3]MNR, Key Lab Space Ocean Remote Sensing & Applicat, Beijing, Peoples R China;[4]Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD USA

年份：2023

卷号：19

期号：2

起止页码：469

外文期刊名：OCEAN SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000973253200001)、、Scopus(收录号：2-s2.0-85159028988)、WOS

基金：This research was funded by the National Key Research and Development Program of China (grant no. 2022YFC3104805), the National Natural Science Foundation of China (grant nos. 42276019, 41476009, 41976200, 41506018, 41706025), the Innovation Team Plan for Universities in Guangdong Province (grant no. 2019KCXTF021), the First-class Discipline Plan of Guangdong Province (grant nos. 080503032101, 231420003), and the Guangdong Science and Technology Plan Project (Observation of Tropical marine environment in Yuexi).

语种：英文

外文摘要：Using satellite observations from 2003 to 2020 and cruise observations from 2019 and 2021, this study reveals an unexpected minor role of upwelling in seasonal and interannual variations in chlorophyll a (Chl a) concentrations in the coastal upwelling region east of Hainan Island (UEH) in the northwestern South China Sea (NWSCS). The results show strong seasonal and interannual variability in the Chl a concentration in the core upwelling area of the UEH. Different from the strongest upwelling in summer, the Chl a concentration in the UEH area reaches a maximum of 1.18 mg m(-3) in autumn and winter, with a minimum value of 0.74 mg m(-3) in summer. The Chl a concentration in summer increases to as high as 1.0 mg m(-3) with weak upwelling, whereas the maximum Chl a concentration in October increases to 2.5 mg m(-3). The analysis of environmental factors shows that, compared to the limited effects of upwelling, the along-shelf coastal current from the northern shelf and the increased precipitation are crucially important to the Chl a concentration variation in the study area. These results provide new insights for predicting marine productivity in upwelling areas, i.e., multiple mechanisms, especially horizontal advection, should be considered in addition to the upwelling process.