The Nordic Seas carbon budget: Sources, sinks, and uncertainties
The Nordic Seas carbon budget: Sources, sinks, and uncertainties
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DOI：
10.1029/2010gb003961
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发表时间：
2011-12-09
影响因子：
5.2
通讯作者：
Falck, Eva
中科院分区：
文献类型：
--
作者：
Jeansson, Emil;Olsen, Are;Falck, Eva
北欧海的碳预算是通过将 CARINA 数据库的最新无机碳数据与相关体积运输相结合得出的。北欧海水体中的有机碳值、河流径流输入的碳量以及通过沉积物掩埋去除的碳量均取自文献。北欧海最大的碳源是穿过格陵兰-苏格兰海岭进入该地区的大西洋水；对于人为二氧化碳来说尤其如此。流入北大西洋深处的密集溢流是北欧海域碳的主要汇。预算显示，目前有 12.3 +/- 1.4 Gt C yr(-1) 被输送到北欧海域，12.5 +/- 0.9 Gt C yr(-1) 被输送出去，导致北欧海域的净平流碳输送量为 0.17 +/- 0.06 Gt C yr(-1)。考虑到储存量，这意味着从空到海的二氧化碳净转移量为 0.19 +/- 0.06 Gt C yr(-1) 进入北欧海域。因此，通过北欧海的碳水平输送比从大气中吸收的二氧化碳大约大两个数量级。 2002年与工业化前时期相比，二氧化碳吸收量没有差异，但由于人为二氧化碳的积累，目前北欧海域的碳平流净输出量较小。
A carbon budget for the Nordic Seas is derived by combining recent inorganic carbon data from the CARINA database with relevant volume transports. Values of organic carbon in the Nordic Seas' water masses, the amount of carbon input from river runoff, and the removal through sediment burial are taken from the literature. The largest source of carbon to the Nordic Seas is the Atlantic Water that enters the area across the Greenland-Scotland Ridge; this is in particular true for the anthropogenic CO2. The dense overflows into the deep North Atlantic are the main sinks of carbon from the Nordic Seas. The budget show that presently 12.3 +/- 1.4 Gt C yr(-1) is transported into the Nordic Seas and that 12.5 +/- 0.9 Gt C yr(-1) is transported out, resulting in a net advective carbon transport out of the Nordic Seas of 0.17 +/- 0.06 Gt C yr(-1). Taking storage into account, this implies a net air-to-sea CO2 transfer of 0.19 +/- 0.06 Gt C yr(-1) into the Nordic Seas. The horizontal transport of carbon through the Nordic Seas is thus approximately two orders of magnitude larger than the CO2 uptake from the atmosphere. No difference in CO2 uptake was found between 2002 and the preindustrial period, but the net advective export of carbon from the Nordic Seas is smaller at present due to the accumulation of anthropogenic CO2.