globalchange  > 气候变化事实与影响
DOI: 10.1002/2017GB005656
Scopus记录号: 2-s2.0-85026382235
论文题名:
Sea-air exchange patterns along the central and outer East Siberian Arctic Shelf as inferred from continuous CO2, stable isotope, and bulk chemistry measurements
作者: Humborg C; , Geibel M; C; , Anderson L; G; , Björk G; , Mörth C; -M; , Sundbom M; , Thornton B; F; , Deutsch B; , Gustafsson E; , Gustafsson B; , Ek J; , Semiletov I
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2017
卷: 31, 期:7
起始页码: 1173
结束页码: 1191
语种: 英语
英文关键词: air-sea flux ; carbon ; carbon isotope ; climate change ; respiration ; Siberian Shelf
Scopus关键词: air-sea interaction ; carbon dioxide ; carbon flux ; carbon isotope ; carbon sink ; climate change ; dissolved inorganic carbon ; dissolved organic carbon ; isotopic composition ; isotopic ratio ; mixing ; respiration ; shelf break ; stable isotope ; Arctic Ocean ; East Siberian Sea ; Laptev Sea ; Siberian Shelf
英文摘要: This large-scale quasi-synoptic study gives a comprehensive picture of sea-air CO2 fluxes during the melt season in the central and outer Laptev Sea (LS) and East Siberian Sea (ESS). During a 7 week cruise we compiled a continuous record of both surface water and air CO2 concentrations, in total 76,892 measurements. Overall, the central and outer parts of the ESAS constituted a sink for CO2, and we estimate a median uptake of 9.4 g C m−2 yr−1 or 6.6 Tg C yr−1. Our results suggest that while the ESS and shelf break waters adjacent to the LS and ESS are net autotrophic systems, the LS is a net heterotrophic system. CO2 sea-air fluxes for the LS were 4.7 g C m−2 yr−1, and for the ESS we estimate an uptake of 7.2 g C m−2 yr−1. Isotopic composition of dissolved inorganic carbon (δ13CDIC and δ13CCO2) in the water column indicates that the LS is depleted in δ13CDIC compared to the Arctic Ocean (ArcO) and ESS with an offset of 0.5‰ which can be explained by mixing of δ13CDIC-depleted riverine waters and 4.0 Tg yr−1 respiration of OCter; only a minor part (0.72 Tg yr−1) of this respired OCter is exchanged with the atmosphere. Property-mixing diagrams of total organic carbon and isotope ratio (δ13CSPE-DOC) versus dissolved organic carbon (DOC) concentration diagram indicate conservative and nonconservative mixing in the LS and ESS, respectively. We suggest land-derived particulate organic carbon from coastal erosion as an additional significant source for the depleted δ13CDIC. ©2017. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77727
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作者单位: Department of Environmental Science and Analytical Chemistry, Stockholm University, Stockholm, Sweden; Baltic Sea Centre, Stockholm University, Stockholm, Sweden; Department of Marine Sciences, Gothenburg University, Gothenburg, Sweden; Bolin Centre for Climate Research, Stockholm, Sweden; Department of Geological Sciences, Stockholm University, Stockholm, Sweden; International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, United States; National Tomsk Research Polytechnic University, Tomsk, Russian Federation; Laboratory of Arctic Studies, Pacific Oceanological Institute, Far Eastern Branch of Russian Academy of Sciences, Vladivostok, Russian Federation

Recommended Citation:
Humborg C,, Geibel M,C,et al. Sea-air exchange patterns along the central and outer East Siberian Arctic Shelf as inferred from continuous CO2, stable isotope, and bulk chemistry measurements[J]. Global Biogeochemical Cycles,2017-01-01,31(7)
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