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Multi-decadal warming of Atlantic water and associated decline of dissolved oxygen in a deep fjord

机译：大西洋水的年代际变暖和深峡湾中溶解氧的减少

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Previous studies have shown decline in dissolved oxygen of the ocean basins. A hypothesis for this development is that ocean warming through increased stratification has caused reduced ventilation of the interior ocean. Here we provide evidence that reduced ventilation, which has been associated with a 1 degrees C warming of the North Atlantic Water (NAW), has contributed to recent deoxygenation of the mesopelagic zone of a Norwegian fjord, Masfjorden. Our results suggest that after the North Atlantic "Great Salinity Anomalies" around 1980, this warming has led to a decreased frequency of high-density intrusions of oxygen rich NAW and thereby reduced the renewal of the basin water of Masfiorden. From this, we infer that the basin water of other deep fjords are prone to similar development and briefly discuss some potential implications of deoxygenation in the mesopelagic zone.
机译：先前的研究表明，海盆中溶解氧的减少。这种发展的一个假设是，由于分层增加，海洋变暖导致内部海洋的通风减少。在这里，我们提供的证据表明，通风减少与北大西洋水（NAW）的1摄氏度变暖有关，最近促成了挪威峡湾Masfjorden中近生带的脱氧。我们的结果表明，在1980年左右北大西洋发生“大盐度异常”之后，这种变暖导致高密度入侵富氧NAW的频率降低，从而减少了Masfiorden盆地水的更新。据此，我们推断其他深峡湾的盆地水也有类似的发展趋势，并简要讨论了中弹性带中脱氧的一些潜在影响。

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