Abstract The Southern Ocean is a globally important carbon sink region. However, the austral coastal zones are usually not considered in global estimations due to their general undersampling and large regional dynamics. Thus, estimations of carbon uptake in the Southern Ocean may differ considerably from current values, i.e., without accounting for coastal regions. Here, we conducted a case study in the Gerlache Strait, an ecologically important Antarctic coastal zone. We show that the net sea–air CO2 flux (FCO2) in the strait may reach the same or greater magnitudes than those in large open sea regions around Antarctica during summer, despite having a much smaller area. A large mean FCO2 of –31 ± 19 mmol m−2 d–1 was observed in the strong CO2 sink years (i.e., FCO2

中文翻译：

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南大洋沿岸地区夏季二氧化碳汇行为加剧

摘要 南大洋是全球重要的碳汇区。然而，由于普遍欠采样和大的区域动态，在全球估计中通常不考虑南部沿海地区。因此，对南大洋碳吸收的估计可能与当前值有很大不同，即没有考虑沿海地区。在这里，我们在具有重要生态意义的南极沿海地区 Gerlache 海峡进行了案例研究。我们表明，尽管面积小得多，但夏季期间，海峡中的净海气 CO2 通量 (FCO2) 可能达到与南极洲周围大型公海区域相同或更大的量级。在强 CO2 汇年（即 FCO2