Particle dynamics revealed by^(210)Po/^(210)Pb disequilibria around Prydz Bay,the Southern Ocean in summer

作     者：CHEN Mengya CHEN Min ZHENG Minfang QIU Yusheng ZHU Jing QIAN Qiankun CHEN Mengya;CHEN Min;ZHENG Minfang;QIU Yusheng;ZHU Jing;QIAN Qiankun

作者机构：College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China 

出 版 物：《Advances in Polar Science》 (极地科学进展（英文版）)

年 卷 期：2022年第33卷第1期

页      面：71-85页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0908[农学-水产] 07[理学] 0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0707[理学-海洋科学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0816[工学-测绘科学与技术] 0706[理学-大气科学] 0825[工学-航空宇航科学与技术] 0713[理学-生态学] 

基　　金：financially supported by National Polar Special Program “Impact and Response of Antarctic Seas to Climate Change” (Grant nos. IRASCC 01-01-02C, 02-01-01) supported by National Natural Science Foundation of China (Grant no. 41721005) the program funded by China Ocean Mineral Resources R & D Association (Grant no. DY135-13-E2-03) 

主　　题：^(210)Po/^(210)Pb disequilibria ^(210)Po excess particle dynamics POC export Prydz Bay 

摘      要：Seawater samples were collected around Prydz Bay in summer of 2014,dissolved and particulate^(210)Po and^(210)Pb were measured to reveal the disequilibrium characteristics and particle *** results show that the distribution of^(210)Po and^(210)Po/^(210)Pb activity ratio in the upper water is mainly affected by biological absorption or particle *** abnormal excess of^(210)Po relative to^(210)Pb was observed in the surface water at stations P1-2 and P2-2,which is likely to be the horizontal transport of water mass with high DPo/DPb)_(A.R.)and TPo/TPb)_(A.R.).In this study,the removal of particulate^(210)Po is mainly controlled by the scavenging of dissolved^(210)Po and the two have a linear positive correlation with the salinity,a negative linear correlation with the content of dissolved oxygen and a reciprocal relationship with the content of *** export flux of POC at 100 m is estimated to be 1.8-4.4 mmol·m^(−2)·d^(−1)(avg.2.9 mmol·m^(−2)·d^(−1))based on^(210)Po/^(210)Pb disequilibria,with the highest value in the shelf,which is consistent with the distribution of biological productivity.