234Th-derived particulate organic carbon export flux in the western Arctic Ocean

Wen Yu; Liqi Chen; Jianping Cheng; Jianhua He; Mingduan Yin; Zhi Zeng

doi:10.1007/s00343-010-9933-1

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234Th-derived particulate organic carbon export flux in the western Arctic Ocean

Updated：2023-05-16

- 234Th-derived particulate organic carbon export flux in the western Arctic Ocean
- Journal of Oceanology and Limnology Vol. 28, Issue 6, Pages: 1146-1151(2010)
- Affiliations：
  
  1. Key Laboratory of Global Change and Marine-Atmospheric Chemistry SOA
  2. Department of Engineering Physics Tsinghua University
  3. Ministry of Education Key Laboratory of Particle & Radiation Imaging (Tsinghua University)
- Author bio：
- Funds：
- DOI：10.1007/s00343-010-9933-1
  CLC：
- Online First：10 November 2010，
  
  Published：2010
- Accepted：
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Yu, W., Chen, L., Cheng, J. et al. 234Th-derived particulate organic carbon export flux in the western Arctic Ocean., Chin. J. Ocean. Limnol. 28, 1146–1151 (2010). https://doi.org/10.1007/s00343-010-9933-1
DOI：

Yu, W., Chen, L., Cheng, J. et al. 234Th-derived particulate organic carbon export flux in the western Arctic Ocean., Chin. J. Ocean. Limnol. 28, 1146–1151 (2010). https://doi.org/10.1007/s00343-010-9933-1 DOI：

摘要

Abstract

To evaluate the particle dynamics and estimate the POC (particulate organic carbon) export flux from the euphotic zone in the western Arctic Ocean

234Th-238U disequilibrium was applied during the second Chinese National Arctic Research Expedition (July 15–September 26

2003). The POC export fluxes are estimated from the measured profiles of the 234Th/238U activity ratios and the POC/PTh ratios. The average residence times of the particulate and dissolved 234Th in the euphotic zone are 33 d and 121 d

and their average export fluxes are 480 dpm/m2d and 760 dpm/m2d

respectively. The scavenging and removal processes of particle reactive elements are active in the upper layer of the Chukchi Sea. The average residence time of 234Th increases from shelf to basin

while the export fluxes of 234Th decrease. The estimated POC export fluxes from the euphotic zone vary from 2.1 to 20.3 mmol/m2d

indicating that the western Arctic Ocean is an important carbon sink in summer due to efficient biological pump.

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references

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