Mapping of the air–sea CO2 flux in the Arctic Ocean and its adjacent seas: Basin-wide distribution and seasonal to interannual variability
Mapping of the air–sea CO2 flux in the Arctic Ocean and its adjacent seas: Basin-wide distribution and seasonal to interannual variability
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DOI：
10.1016/j.polar.2016.03.006
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发表时间：
2016-09
期刊：
影响因子：
1.8
通讯作者：
S. Yasunaka;A. Murata;E. Watanabe;M. Chierici;A. Fransson;S. Heuven;M. Hoppema;M. Ishii;T. Johannessen;N. Kosugi;S. Lauvset;J. Mathis;S. Nishino;A. Omar;A. Olsen;D. Sasano;Taro Takahashi;R. Wanninkhof
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文献类型：
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作者：
S. Yasunaka;A. Murata;E. Watanabe;M. Chierici;A. Fransson;S. Heuven;M. Hoppema;M. Ishii;T. Johannessen;N. Kosugi;S. Lauvset;J. Mathis;S. Nishino;A. Omar;A. Olsen;D. Sasano;Taro Takahashi;R. Wanninkhof
我们利用自组织映射技术，从1997年1月到2013年12月，制作了204幅北冰洋以北60°N以北海域(包括北冰洋及其邻近海域)的大气-海洋CO2通量月图。地表水数据中的二氧化碳分压(PCO2)是通过在船测量或根据地表水样品的碱度和总无机碳计算得到的。随后，我们研究了CO2通量的全流域分布和季节-年际变化。17年的年平均CO2通量表明，北冰洋及其邻近海域的所有区域都是净CO2汇。北冰洋的二氧化碳年吸收估计为180TGC/年−1。由于强风，格陵兰/挪威海(15−2day−1)和巴伦支海(>；12−2day−1)的CO2流入在冬季最强，而由于海冰消退，楚科奇海的夏季最强(∼10−2day−1)。近年来，格陵兰/挪威海的二氧化碳吸收增加，巴伦支海南部的二氧化碳吸收减少，这分别是由于大气-海洋二氧化碳差异的增加和减少。
We produced 204 monthly maps of the air–sea CO2flux in the Arctic north of 60°N, including the Arctic Ocean and its adjacent seas, from January 1997 to December 2013 by using a self-organizing map technique. The partial pressure of CO2(pCO2) in surface water data were obtained by shipboard underway measurements or calculated from alkalinity and total inorganic carbon of surface water samples. Subsequently, we investigated the basin-wide distribution and seasonal to interannual variability of the CO2fluxes. The 17-year annual mean CO2flux shows that all areas of the Arctic Ocean and its adjacent seas were net CO2sinks. The estimated annual CO2uptake by the Arctic Ocean was 180 TgC yr−1. The CO2influx was strongest in winter in the Greenland/Norwegian Seas (>15 mmol m−2day−1) and the Barents Sea (>12 mmol m−2day−1) because of strong winds, and strongest in summer in the Chukchi Sea (∼10 mmol m−2day−1) because of the sea-ice retreat. In recent years, the CO2uptake has increased in the Greenland/Norwegian Sea and decreased in the southern Barents Sea, owing to increased and decreased air–seapCO2differences, respectively.