pCO2 distribution and CO2 flux on the inner continental shelf of the East China Sea during summer 2011

Baoxiao Qu; Jinming Song; Xuegang Li; Huamao Yuan; Ning Li; Qingxia Ma

doi:10.1007/s00343-013-2225-9

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pCO2 distribution and CO2 flux on the inner continental shelf of the East China Sea during summer 2011

OriginalPaper | Updated：2023-05-16

- pCO2 distribution and CO2 flux on the inner continental shelf of the East China Sea during summer 2011
- pCO2 distribution and CO2 flux on the inner continental shelf of the East China Sea during summer 2011
- 海洋湖沼学报（英文） 2013年31卷第5期页码：1088-1097
- Affiliations：
  
  1. Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanography Chinese Academy of Sciences
  2. University of Chinese Academy of Sciences
- Author bio：
- Funds：
  
  Supported by the National Basic Research Program of China (973 Program) (No. 2010CB951802), the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA05030402), the Natural Science Foundation of China for Creative Research Groups (No. 41121064), the National Natural Science Foundation of China (No. 40906056), and the Public Science and Technology Research Funds Projects of Ocean (No. 200905012-9)
- DOI：10.1007/s00343-013-2225-9
  中图分类号：
- 网络首发：2013-09-07，
  
  纸质出版：2013
- Accepted：
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pCO2 distribution and CO2 flux on the inner continental shelf of the East China Sea during summer 2011[J]. 海洋湖沼学报（英文）, 2013,31(5):1088-1097.

Qu, B., Song, J., Li, X. et al. , pCO2 distribution and CO2 flux on the inner continental shelf of the East China Sea during summer 2011., Chin. J. Ocean. Limnol. 31, 1088–1097 (2013). https://doi.org/10.1007/s00343-013-2225-9
pCO2 distribution and CO2 flux on the inner continental shelf of the East China Sea during summer 2011[J]. 海洋湖沼学报（英文）, 2013,31(5):1088-1097. DOI： 10.1007/s00343-013-2225-9.

Qu, B., Song, J., Li, X. et al. , pCO2 distribution and CO2 flux on the inner continental shelf of the East China Sea during summer 2011., Chin. J. Ocean. Limnol. 31, 1088–1097 (2013). https://doi.org/10.1007/s00343-013-2225-9 DOI：

摘要

Abstract

Measurements of pH

total alkalinity (TA)

partial pressure of CO2 (pCO2) and air-sea CO2 flux (FCO2) were conducted for the inner continental shelf of the East China Sea (ECS) during August 2011. Variations in pCO2 distribution and FCO2 magnitude during the construction of the Three Gorges Dam (TGD) (2003–2009)

and the potential effects of the TGD on the air-sea CO2 exchange were examined. Results showed that the ECS acts as an overall CO2 sink during summer

with pCO2 ranging from 107 to 585 μatm and an average FCO2 of −6.39 mmol/(m2 ·d). Low pCO2 (<350 μatm) levels were observed at the central shelf (28°-32°N

123°-125.5°E) where most CO2-absorption occurred. High pCO2 (>420 μatm) levels were found in the Changjiang estuary and Hangzhou Bay which acted as the main CO2 source. A negative relationship between pCO2 and salinity (R 2=0.722 0) in the estuary zone indicated the predominant effect of the Changjiang Diluted Water (CDW) on the seawater CO2 system

whereas a positive relationship (R 2=0.744 8) in the offshore zone revealed the influence of the Taiwan Current Warm Water (TCWW). Together with the historical data

our results indicated that the CO2 sink has shown a shift southwest while FCO2 exhibited dramatic fluctuation during the construction of the TGD

which is located in the middle reaches of the Changjiang. These variations probably reflect fluctuation in the Changjiang runoff

nutrient import

phytoplankton productivity

and sediment input

which are likely to have been caused by the operations of the TGD. Nevertheless

the potential influence of the TGD on the CO2 flux in the ECS is worthy of further study.

关键词

Keywords

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