文献类型：期刊文献

英文题名：Quantification of the Seasonal Intrusion of Water Masses and Their Impact on Nutrients in the Beibu Gulf Using Dual Water Isotopes

作者：Lao, Qibin[1];Zhang, Shuwen[2];Li, Zhiyang[3];Chen, Fajin[1,4,5];Zhou, Xin[1];Jin, Guangzhe[1,4,5];Huang, Peng[1,4,5];Deng, Ziyun[1];Chen, Chunqing[1];Zhu, Qingmei[1,4,5];Lu, Xuan[1]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang, Peoples R China;[2]Shantou Univ, Inst Marine Sci, Shantou, Peoples R China;[3]Guangdong AIB Polytech Coll, Guangzhou, Peoples R China;[4]Guangdong Ocean Univ, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang, Peoples R China;[5]Guangdong Ocean Univ, Key Lab Climate Resources & Environm Continental, Dept Educ Guangdong Prov, Zhanjiang, Peoples R China

年份：2022

卷号：127

期号：7

外文期刊名：JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS

收录：SCI-EXPANDED(收录号：WOS:000826308900001)、、Scopus(收录号：2-s2.0-85135419815)、WOS

基金：This work was supported by National Natural Science Foundation of China (U1901213, 92158201), Guangdong Natural Science Foundation of China (2019B1515120066), Guangxi Natural Science Foundation of China (2020GXNSFBA297065), Scientific Research Start-Up Foundation of Shantou University (NTF20006), Innovation and Entrepreneurship Project of Shantou (2021112176541391), Guangdong Provincial College Innovation Team Project (2019KCXTF021). We would also like to thank the four anonymous reviewers for their valuable comments and suggestions.

语种：英文

外文关键词：water isotopes; nutrients; water mass; Beibu Gulf; South China Sea

外文摘要：A new data set of seasonal stable water isotopes (delta D and delta O-18) and temperature-salinity profiles was applied to improve our understanding of water mass distributions and their impact on the environment of the Beibu Gulf (BG). Our study revealed that the coastal current (CC), West-Guangdong coastal current (WGCC), and South China Sea water (SCSW) were the three dominant water masses in the BG, and their influence was exhibited in seasonal variations. The CC was the dominant contributor to the BG water during summer (43%) and fall (45%), while it changed to the intrusion of SCSW with higher salinity in winter (57%). The contribution of WGCC to the BG was relatively stable during the three seasons (24%-31%). In addition, the nutrients in the BG were greatly affected by different water mixing occurring in the gulf. The nutrients mainly originated from the CC in summer (52%-68%) and fall (32%-69%), while the dominant source shifted to the WGCC in winter (36%-69%). Moreover, the contribution of SCSW to the nutrients loading (15%-49%) in the BG was relatively high due to its high contribution (57%) to the BG water during winter. These indicated that the BG has a stable input of external nutrients from different water masses to sustain primary production in the BG. Our study uses dual water isotopes to quantify the seasonal intrusion of water masses and their impact on nutrients, providing a new method to study the impact of the distribution of water masses on nutrients in the gulf.