Observed features of stable surface seawater isotopes across the Pacific, Indian and Southern oceans  

作　　者：Xuemei Wu Weijun Sun Biao Tian Baojuan Huai Zhiheng Du Minghu Ding 

机构地区：[1]College of Geography and Environment,Shandong Normal University,Jinan 250014,China [2]State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China [3]State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China

出　　处：《Acta Oceanologica Sinica》2024年第10期33-39,共7页海洋学报（英文版）

基　　金：The National Natural Science Foundation of China under contract No.42122047;the Basic Research Fund of Chinese Academy of Meteorological Sciences under contract Nos 2021Z006,2023Z015 and 2023Z005;the Chinese National Antarctic Science Expedition.

摘　　要：The marine hydrological process is still unclear due to scarce observations.Based on stable water isotopes in surface seawater along the 33rd Chinese National Antarctic Science Expedition from November 2016 to April 2017,this study explored the hydrological processes in the Pacific,Indian and Southern oceans.The results show that the Northwest Pacific(0°–26°N)is a region with strong evaporation(theδ18O-δD slope is 6.58),while the southern Indian Ocean is a region with strong precipitation(theδ18O-δD slope is 9.57).The influence of continental runoff and water mass mixing reduces the correlation betweenδ18O and salinity in the eastern Indian Ocean.The characteristics of the isotopes and hydrological parameters indicate that the Agulhas Front and sub-Tropical Convergence do not merge in the Antarctic–Indian Ocean region.The freezing of sea ice near the Antarctic continent decreases theδ18O andδD by 0.40‰and 7.0‰,respectively,compared with those near 67°S.This study is helpful for understanding marine hydrological processes and promoting the understanding and research of the nature of ocean responses in the context of climate change.

关 键 词：spatial variability surface seawater isotopes δ18O-salinity relation water mass fronts 

分 类 号：P731[天文地球—海洋科学]