Distributions and air-sea fluxes of CO2 in the summer Bering Sea

• Published in: Acta oceanologica Sinica Vol. 33; no. 6; pp. 1 - 8
• Main Authors: Chen, Liqi, Gao, Zhongyong, Sun, Heng, Chen, Baoshan, Cai, Wei-jun
• Format: Journal Article
• Language: English
• Published: Heidelberg The Chinese Society of Oceanography 01.06.2014; Springer Nature B.V; Key Laboratory of Global Change and Marine-Atmospheric Chemistry of State 0ceanic Administration, Third Institute of 0ceanography, State 0ceanic Administration, Xiamen 361005, China%Department of Marine Sciences, University of Georgia, Athens, GA 30602, USA
• Subjects: Alkalinity; Carbon dioxide; Chemical analysis; Climatology; Dissolved inorganic carbon; Earth and Environmental Science; Earth Sciences; Ecology; Engineering Fluid Dynamics; Environmental Chemistry; Expeditions; Gases; Marine & Freshwater Sciences; Oceanography; Oceans; Partial pressure; Research expeditions; Salinity; Seawater; Shelving; Summer; Uptake; Velocity; Water analysis; 二氧化碳分压; 二氧化碳通量; 北极科学考察; 夏季; 海气通量; 溶解无机碳; 白令海峡; 表层海水; Bering Sea; Pacific Ocean; Arctic region; China; Bering Strait; Bering Sea; flux; system; CO; air-sea CO; partial pressure of CO; partial pressure of CO2; CO2 system; air-sea CO2 flux
• ISSN: 0253-505X; 1869-1099
• DOI: 10.1007/s13131-014-0483-9

The 3rd Chinese National Arctic Research Expedition （CHINARE-Arctic III） was carried out from July to September in 2008. The partial pressure of CO2 （pCO2） in the atmosphere and in surface seawater were determined in the Bering Sea during luly 11-27, 2008, and a large number of seawater samples were taken for total alkalinity （TA） and total dissolved inorganic carbon （DIC） analysis. The distributions of CO2 parameters in the Bering Sea and their controlling factors were discussed. The pCO2 values in surface seawater presented a drastic variation from 148 to 563 laatm （1 μatm = 1.013 25× 10-1Pa）. The lowest pCOz values were observed near the Bering Sea shelf break while the highest pCO2 existed at the western Bering Strait. The Bering Sea generally acts as a net sink for atmospheric CO2 in summer. The air-sea CO2 fluxes in the Bering Sea shelf, slope, and basin were estimated at -9.4, -16.3, and -5.1 mmol/（m2.d）, respectively. The annual uptake of CO2 was about 34 Tg C in the Bering Sea.