Meridional distribution of 226Ra in the west pacific and the southern ocean surface waters

Zhigang Chen; Yipu Huang; Min Chen; Pinghe Cai; Na Xing; Yihua Cai; Jinfang Chen

doi:10.1007/s00343-011-0308-z

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Meridional distribution of 226Ra in the west pacific and the southern ocean surface waters

Updated：2023-05-16

- Meridional distribution of 226Ra in the west pacific and the southern ocean surface waters
- Journal of Oceanology and Limnology Vol. 29, Issue 6, Pages: 1224-1236(2011)
- Affiliations：
  
  1. College of Oceanography and Environment Xiamen University
  2. Bio-engineering College of Jimei University
- Author bio：
- Funds：
- DOI：10.1007/s00343-011-0308-z
  CLC：
- Online First：25 October 2011，
  
  Published：2011
- Accepted：
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Chen, Z., Huang, Y., Chen, M. et al. Meridional distribution of 226Ra in the west pacific and the southern ocean surface waters., Chin. J. Ocean. Limnol. 29, 1224–1236 (2011). https://doi.org/10.1007/s00343-011-0308-z
DOI：

Chen, Z., Huang, Y., Chen, M. et al. Meridional distribution of 226Ra in the west pacific and the southern ocean surface waters., Chin. J. Ocean. Limnol. 29, 1224–1236 (2011). https://doi.org/10.1007/s00343-011-0308-z DOI：

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.

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