Quantifying biological carbon export for the northwest North Atlantic continental shelves
Quantifying biological carbon export for the northwest North Atlantic continental shelves
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DOI：
10.1029/2009gl039818
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发表时间：
2009-09-19
影响因子：
5.2
通讯作者：
Wilkin, John
中科院分区：
文献类型：
--
作者：
Fennel, Katja;Wilkin, John
有人认为，大陆架系统对海洋吸收大气CO2的贡献不成比例，但对这种通量的大小和不同基本机制的相对贡献的量化很差。一个生物大陆架泵机制已被暗示，但是，这种输出的规模取决于平流输送富含碳的水离开大陆架，这是一个很难直接观察的过程。在这里，我们使用的物理-地球化学模型，北美大陆边缘东北部的大气CO2的吸收，这一吸收的生物过程的结果，和运输的有机碳的货架。我们的研究结果表明，有没有系统的差异，在面积归一化的CO2吸收之间的大陆架区域和邻近的深海。富碳水离开大陆架的平流输送不足以驱动该区域的大陆架泵。引用：Fennel，K.，和J. Wilkin（2009年），量化北大西洋西北部大陆架的生物碳出口，地球物理学。保留信函：36，L18605，doi：10.1029/2009GL039818。
It has been suggested that continental shelf systems contribute disproportionately to the oceanic uptake of atmospheric CO2, but the magnitude of this flux and the relative contributions of different underlying mechanisms are poorly quantified. A biological continental shelf pump mechanism has been implied; however, the magnitude of this export depends on advective transport of carbon-rich water off the shelf, a process that is difficult to observe directly. Here we use a physical-biogeochemical model for the northeastern North American continental margin to estimate the uptake of atmospheric CO2, the fraction of this uptake that results from biological processes, and the transport of organic carbon off the shelf. Our results suggest that there is no systematic difference in the area-normalized CO2 uptake between the shelf regions and the adjacent deep ocean. The advective transport of carbon-rich water off the shelf is insufficient to drive a Continental Shelf Pump in this region. Citation: Fennel, K., and J. Wilkin (2009), Quantifying biological carbon export for the northwest North Atlantic continental shelves, Geophys. Res. Lett., 36, L18605, doi:10.1029/2009GL039818.