Abstract

In this study we detail the mechanism of positive feedback linking variability of the oceanic heat flux in the Barents Sea, the sea-ice area and the atmospheric circulation over the region using oceanic and atmospheric reanalyses. The results show that an increase in the oceanic heat flux through the western boundary of the Barents Sea goes much faster than in the Norwegian Atlantic Slope Current in the eastern Norwegian Sea. With an increase in the oceanic heat flux in the Barents Sea, the ice edge retreats and the total vertical ocean–atmosphere heat fluxes weaken in the southwestern part of the sea and increase west of Novaya Zemlya and in the northern part of the sea. The latter is due to the increased ice-free area in the sea. The increased heat fluxes into the Barents Sea are also accompanied by a winter growth of the sea-surface atmospheric pressure over the sea with maximum changes in the southeastern Barents Sea. This leads to a localization of the cyclonic circulation in the northwestern Barents Sea, a growth in the atmospheric heat transport across the southern boundary, and a decrease of the atmospheric heat transport across the northern boundary. The convergence of atmospheric heat flux in the given region increases near the sea surface (1000–975 hPa), but decreases at higher levels (975–100 hPa).

中文翻译：

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从再分析资料看巴伦支海的海洋-大气相互作用

摘要

在这项研究中，我们使用海洋和大气再分析，详细说明了正反馈与巴伦支海，海冰区和该地区大气环流的变化之间的正反馈联系。结果表明，穿过巴伦支海西边界的海洋热通量的增加要快于挪威东部海域的挪威大西洋坡流。随着巴伦支海海洋热通量的增加，冰的边缘撤退，海洋垂直总热通量在海的西南部减弱，在诺瓦亚泽姆利亚以西和海北部增加。后者是由于海洋中无冰面积的增加。进入巴伦支海的热通量的增加还伴随着冬季海表气压在冬季的增长，而东南巴伦支海的变化最大。这导致西北巴伦支海的气旋环流局部化，穿过南部边界的大气热传输增加，以及穿过北部边界的大气热传输减少。在给定区域中，大气热通量的收敛在海面附近（1000–975 hPa）增大，但在较高水平（975–100 hPa）减小。并减少了北部边界的大气热传输。在给定区域中，大气热通量的收敛在海面附近（1000–975 hPa）增大，但在较高水平（975–100 hPa）减小。并减少了北部边界的大气热传输。在给定区域中，大气热通量的收敛在海面附近（1000–975 hPa）增大，但在较高水平（975–100 hPa）减小。