Mesoscale Eddies Enhance the Air-Sea CO 2 Sink in the South Atlantic Ocean
Mesoscale Eddies Enhance the Air-Sea CO 2 Sink in the South Atlantic Ocean
复制标题
中尺度涡流增强了南大西洋的海气 CO 2 沉降
DOI：
10.1029/2022gl102137
复制
发表时间：
2023
影响因子：
5.2
通讯作者：
Ford D
中科院分区：
文献类型：
--
作者：
Ford D
全球海洋中有大量的中尺度涡旋，并已知会影响海洋和大气条件。了解它们对大气-海洋二氧化碳(CO2)通量的累积影响可能会对海洋碳汇产生重大影响。用观测和拉格朗日追踪方法估算了南大西洋67个长期(每年1个)中尺度涡旋在16年期间的大气-海洋二氧化碳通量。来自阿古拉反射的反气旋性涡旋和来自本格拉上升流的气旋性涡旋在其一生中都起到了净CO2汇的作用。反气旋性涡旋的净CO2SINK呈指数下降，而气旋性涡旋呈线性增加。这些涡旋加在一起，显著增加了进入南大西洋的CO2SINK 0.08±0.04%。所研究的涡旋只占全球涡旋的一小部分，而且涡旋活动正在增加；因此，在评估海洋碳汇时，明确地解决涡旋显得至关重要。
Mesoscale eddies are abundant in the global oceans and known to affect oceanic and atmospheric conditions. Understanding their cumulative impact on the air‐sea carbon dioxide (CO2) flux may have significant implications for the ocean carbon sink. Observations and Lagrangian tracking were used to estimate the air‐sea CO2flux of 67 long lived (>1 year) mesoscale eddies in the South Atlantic Ocean over a 16 year period. Both anticyclonic eddies originating from the Agulhas retroflection and cyclonic eddies originating from the Benguela upwelling act as net CO2sinks over their lifetimes. Anticyclonic eddies displayed an exponential decrease in the net CO2sink, whereas cyclonic eddies showed a linear increase. Combined, these eddies significantly enhanced the CO2sink into the South Atlantic Ocean by 0.08 ± 0.04%. The studied eddies constitute a fraction of global eddies, and eddy activity is increasing; therefore, explicitly resolving eddies appears critical when assessing the ocean carbon sink.