Mapping of the air-sea CO2 flux in the Arctic Ocean and its adjacent seas: Basin-wide distribution and seasonal to interannual variability

作者：Yasunaka Sayaka^*; Murata Akihiko; Watanabe Eiji; Chierici Melissa; Fransson Agneta; van Heuven Steven; Hoppema Mario; Ishii Masao; Johannessen Truls; Kosugi Naohiro; Lauvset Siv K; Mathis Jeremy T; Nishino Shigeto; Omar Abdirahman M; Olsen Are; Sasano Daisuke; Takahashi Taro; Wanninkhof Rik

来源：Polar Science, 2016, 10(3): 323-334.

DOI：10.1016/j.polar.2016.03.006

• Arctic Ocean
• CO2 flux
• Self-organizing map

We produced 204 monthly maps of the air-sea CO2 flux in the Arctic north of 60 degrees 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 (pCO(2)) 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 CO2 fluxes. The 17-year annual mean CO2 flux shows that all areas of the Arctic Ocean and its adjacent seas were net CO2 sinks. The estimated annual CO2 uptake by the Arctic Ocean was 180 TgC yr(-1). The CO2 influx was strongest in winter in the Greenland/Norwegian Seas (>15 mmol m(-2) day(-1)) and the Barents Sea (>12 mmol m(-2) day(-1)) because of strong winds, and strongest in summer in the Chukchi Sea (similar to 10 mmol m(-2) day(-1)) because of the sea-ice retreat In recent years, the CO2 uptake has increased in the Greenland/Norwegian Sea and decreased in the southern Barents Sea, owing to increased and decreased air-sea pCO(2) differences, respectively.

• 出版日期2016-9
• 单位中国气象科学研究院