4.5 Article

Contribution of Changjiang River discharge to CO2 uptake capacity of the northern East China Sea in August 2016

期刊

CONTINENTAL SHELF RESEARCH
卷 215, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.csr.2020.104336

关键词

Changjiang river discharge; CO2 uptake capacity; East China Sea; Sea-air CO2 flux

资金

  1. project titled Study on air-sea interaction and process of rapidly intensifying typhoon in the northwestern Pacific - Ministry of Oceans and Fisheries, Korea [PM62260]
  2. Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2016R1A6A1A03012647]
  3. National Research Foundation of Korea [2016R1A6A1A03012647] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

The study focused on the impact of the Changjiang River on CO2 uptake capacity in the northern East China Sea. Results showed that the river significantly lowered surface fCO(2) and the region served as a CO2 sink for the atmosphere. Biological activity in the river-influenced area played a crucial role in CO2 drawdown.
Despite the known significant effect of the Changjiang River on the surface fugacity of CO2 (fCO(2)) in the northern East China Sea (ECS) during summer, the influence of the river on CO2 uptake capacity has yet to be quantified. In this study, spatial variation in surface fCO(2) was studied in the northern ECS in August 2016. The controlling factors on surface fCO(2) were identified and quantified. Surface fCO(2), as influenced by the Changjiang River, was up to 250 mu atm lower than that of oceanic surface water. Biological activity in the river-influenced region lowered surface fCO(2) 150 mu atm-300 mu atm below the physical mixing line of oceanic water with low-salinity and high-CO2 Changjiang River water and contributed to CO2 drawdown. The northern ECS was a CO2 sink for the atmosphere, with an average CO2 flux of-6.74 +/- 2.89 mmol C m(2) d(-1). The CO2 uptake capacity was correlated with salinity, implying an importance of northeastward extension of Changjiang River plume, not the amount of the discharge.

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