首页|期刊导航|中国海洋湖沼学报（英文版）|Meridional distribution of 226Ra in the west Pacific and the Southern Ocean surface waters
中国海洋湖沼学报（英文版）2011，Vol.29Issue(6)：1224-1236,13.DOI:10.1007/s00343-011-0308-z
Meridional distribution of 226Ra in the west Pacific and the Southern Ocean surface waters
Meridional distribution of 226Ra in the west Pacific and the Southern Ocean surface waters
摘要
Abstract
During the 13th (1996-1997) and the 19th (2002-2003) Chinese National Antarctica Research Expeditions,we collected 60 discrete surface seawater samples along the cruise from the Chanjiang River (Yangtze) estuary (30°59′S,122°26′E) through Taiwan Strait,the South China Sea,and the Eastern Indian Ocean to Prydz Bay,Antarctica (69°10′S,74°30′E),and analyzed them for the 226Ra specific activity.The 226Ra specific activity of the Chanjiang River estuary surface water (3.15 Bq/m3) was found to be the highest among all the surface samples because of the desorption of 226Ra from riverine particles.Between Chanjiang River estuary and 40°S,226Ra specific activity was found to be relatively uniform with a mean value of 1.07 Bq/m3 (n=19,SD=0.14),similar to that of the open ocean.From 40°S to 65°S,226Ra specific activity increased intensively,then decreased moderately further southwards.Near the Antarctic shore,it increased again,to 2.31 Bq/m3.This distribution was controlled by a combination of deep water upwelling,Southern Ocean fronts,water mixing and the continental 226Ra import.In Prydz Bay and the adjacent sea area,the mean 226Ra activity value was 2.26 Bq/m3 (n=31,SD=0.28),with a relatively higher value outside of the bay and low 226Ra activity value in the center of the bay.This was consistent with the topography and hydrological setting of the bay.in addition,we extended the study area northward to the Arctic,by combining the published 226Ra dataset for surface water from the Bering Sea to the Japan Sea.We also discuss the 226Ra distribution of high latitude oceanic surface water and its mechanisms.关键词
226Ra/Chanjiang River estuary/Antarctic/Prydz Bay/Leeuwin CurrentKey words
226Ra/Chanjiang River estuary/Antarctic/Prydz Bay/Leeuwin Current引用本文复制引用
CHEN Zhigang,HUANG Yipu,CHEN Min,CAI Pinghe,XING Na,CAI Yihua,CHEN Jinfang..Meridional distribution of 226Ra in the west Pacific and the Southern Ocean surface waters[J].中国海洋湖沼学报（英文版）,2011,29(6):1224-1236,13.基金项目
Supported by the National Natural Science Foundation of China(Nos.40706033 and 40806031) and COMRA Program (Nos.DYXM-115-02-1-12 and DY115-01-2-5) （Nos.40706033 and 40806031）
