North Pacific dissolved inorganic carbon variations related to the Pacific Decadal Oscillation
North Pacific dissolved inorganic carbon variations related to the Pacific Decadal Oscillation
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DOI：
10.1002/2013gl058987
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发表时间：
2014-02
影响因子：
5.2
通讯作者：
S. Yasunaka;Y. Nojiri;S. Nakaoka;T. Ono;H. Mukai;N. Usui
中科院分区：
文献类型：
--
作者：
S. Yasunaka;Y. Nojiri;S. Nakaoka;T. Ono;H. Mukai;N. Usui
利用分压CO2观测得到的月DIC图，研究了2002 - 2008年北太平洋海面溶解无机碳（DIC）浓度的多年变化。太平洋年代际振荡（PDO）与北太平洋DIC异常场的东西跷跷板模式有关。与气候值相比，2002年中期至2005年中期，北太平洋西部DIC浓度相对较高，2007年后期较低，而北太平洋东部则相反。与PDO相关的强迫因子的变化可以解释DIC的东西跷跷板模式：水平平流、大部分地区的淡水通量和垂直混合、40°N以南的二氧化碳通量和亚北极的生物生产。
We elucidated multiyear variations of sea surface dissolved inorganic carbon (DIC) concentrations in the North Pacific from 2002 to 2008 by using monthly DIC maps derived from partial pressure CO2 observations. The Pacific Decadal Oscillation (PDO) was related to an east‐west seesaw pattern in the North Pacific DIC anomaly field. In the western North Pacific, DIC concentrations were relatively high from mid‐2002 to mid‐2005 and low after late 2007 compared with climatological values, and in the eastern North Pacific the opposite change was observed. Changes of the forcing factors associated with the PDO could explain the DIC east‐west seesaw pattern: horizontal advection, freshwater fluxes and vertical mixing in most regions, CO2 fluxes south of 40°N, and biological production in the subarctic.