A model of the Arctic Ocean carbon cycle
A model of the Arctic Ocean carbon cycle
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北冰洋碳循环模型
DOI：
10.1029/2011jc006998
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发表时间：
2011
影响因子：
--
通讯作者：
C. Hill
中科院分区：
文献类型：
--
作者：
D. Menemenlis;J. McClelland;B. Peterson;R. Key;M. Manizza;M. Follows;S. Dutkiewicz;C. Hill
[1]北冰洋环流和混合的三维模式，水平分辨率为18公里，是由一个地球化学模式解决物理，化学和生物运输和转化的磷，碱度，氧和碳，包括海气交换溶解气体和河流输送溶解有机碳覆盖。该模型定性捕获所观察到的区域和季节性趋势的表层海洋PO 4，溶解无机碳，总碱度和pCO 2。该模型每年对整个流域进行一次综合，表明年净吸收量为59 Tg C a−1，在基于当地观测外推的已公布估计值范围内（20-199 Tg C a−1）。这种通量可归因于进入盆地的沃茨水（主要来自亚极地北大西洋）的冷却（溶解度增加）。海-气通量受海冰覆盖和河流溶解有机碳（RDOC）的输送的季节性和区域性调节，海冰覆盖调节海-气气体传输和有机物质的光合作用，河流溶解有机碳（RDOC）驱动欧亚和北美沿海沃茨pCO 2的区域差异。在整个流域内，RDOC的输送和再矿化使海洋CO2净吸收减少了10%。
[1] A three dimensional model of Arctic Ocean circulation and mixing, with a horizontal resolution of 18 km, is overlain by a biogeochemical model resolving the physical, chemical and biological transport and transformations of phosphorus, alkalinity, oxygen and carbon, including the air-sea exchange of dissolved gases and the riverine delivery of dissolved organic carbon. The model qualitatively captures the observed regional and seasonal trends in surface ocean PO4, dissolved inorganic carbon, total alkalinity, and pCO2. Integrated annually, over the basin, the model suggests a net annual uptake of 59 Tg C a−1, within the range of published estimates based on the extrapolation of local observations (20–199 Tg C a−1). This flux is attributable to the cooling (increasing solubility) of waters moving into the basin, mainly from the subpolar North Atlantic. The air-sea flux is regulated seasonally and regionally by sea-ice cover, which modulates both air-sea gas transfer and the photosynthetic production of organic matter, and by the delivery of riverine dissolved organic carbon (RDOC), which drive the regional contrasts in pCO2 between Eurasian and North American coastal waters. Integrated over the basin, the delivery and remineralization of RDOC reduces the net oceanic CO2 uptake by ∼10%.