文献类型：期刊文献

英文题名：Water Mass Processes Between the South China Sea and the Western Pacific Through the Luzon Strait: Insights From Hydrogen and Oxygen Isotopes

作者：Wu, Junhui[1,2,4];Lao, Qibin[1,3];Chen, Fajin[1,4];Huang, Chao[1];Zhang, Shuwen[2];Wang, Chao[1,4];Zhou, Fengxia[1,4];Chen, Chunqing[1];Zhou, Xin[1];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]State Ocean Adm, Marine Environm Monitoring Ctr Beihai, Beihai, Peoples R China;[4]Guangdong Ocean Univ, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang, Peoples R China

年份：2021

卷号：126

期号：8

外文期刊名：JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS

收录：SCI-EXPANDED(收录号：WOS:000690758000023)、、Scopus(收录号：2-s2.0-85113699985)、WOS

基金：We would like to thank professor Fei Yu and Xiaohua Zhu for their support in collecting water samples. This work was supported by National Natural Science Foundation of China (U1901213), Guangdong Natural Science Foundation of China (2019B1515120066, 2016A030312004), Global Climate Changes and Air-sea Interaction Program (GASI-02-PAC-ST-Wwin), Guangxi Natural Science Foundation of China (2020GXNSFBA297065), Project of Enhancing School with Innovation of Guangdong Ocean University (GDOU2016050260).

语种：英文

外文关键词：delta D; delta O-18; water mass; South China Sea; Luzon Strait

外文摘要：A comprehensive, depth specific (near-surface to 3,700 m) water isotope (delta D and delta O-18) data set of 237 water samples collected from 20 different locations from the Northwest Pacific through the Luzon Strait to the Northern South China Sea (NSCS) are used to clarify the deeper understanding of water mass processes using delta O-18-salinity (S) and delta D-delta O-18 relations. Our study reveals that the delta D-delta O-18 correlation has a low slope and the delta O-18-S correlation has a high slope, which are related to the intrusion of the Kuroshio water and the influence of the coastal current above 200 m on the NSCS, respectively. The isotope mixing model showed that 15% is from the Kuroshio water, 40% from the South China Sea (SCS) Tropical Water, and 45% from the coastal current for water above 200 m in the NSCS. In the intermediate layer (300-1,200 m), a significant delta O-18-S correlation was found at depths of 300-700 m on the NSCS side, but no correlation was found on the western Pacific side, suggesting that the mixing of the water masses of the South China Sea Intermediate Water and the North Pacific Intermediate Water mainly occurs at depth in the NSCS. In the deeper water (below 1,200 m), positive isotopic values were found at depths below 1,500 m, which refuted the previous knowledge that positive isotopic values only exist in the Luzon Strait at depths above 1,000 m, and the positive isotope water mass would flow with the Deep Pacific Water into the deeper water of the SCS. Plain Language Summary A comprehensive, depth specific (near-surface to 3,700 m) water isotope (delta D and delta O-18) data set of 237 water samples collected from 20 different locations from the Northwest Pacific through the Luzon Strait (LS) to the Northern South China Sea (NSCS) are used to clarify the water mass parameters using delta O-18-salinity and delta D-delta O-18. The water mass processes in the surface and subsurface water (0-200 m) in the NSCS are the intrusions of the Kuroshio water from the Western Pacific through the LS into the NSCS (15%), coastal current inputs (45%), and the South China Sea Tropical Water (40%). In the intermediate layer (300-1,200 m), the lower salinity North Pacific Intermediate Water intrudes into the NSCS and mixes with the higher salinity South China Sea Intermediate Water (SCSIW) at 300-700 m, and part of the outflow of the SCSIW in the northern LS is carried southward and then westward back toward the SCS in the southern LS within the recirculation of the anticyclonic eddy. In the deeper water (below 1,200 m), a persistent baroclinic pressure gradient drives the water flow from the Pacific into the SCS through the LS with positive delta D and delta O-18 values.