Historical reconstruction of subpolar North Atlantic overturning and its relationship to density
Historical reconstruction of subpolar North Atlantic overturning and its relationship to density
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DOI：
10.1029/2021jc017732
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
V. Roussenov;Richard G. Williams;M. Lozier;N. P. Holliday;Doug M. Smith
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文献类型：
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作者：
V. Roussenov;Richard G. Williams;M. Lozier;N. P. Holliday;Doug M. Smith
在年际和十年的时间尺度上，使用历史，基于数据的重建在过去60年的翻转和正演模型集成浮力和风强迫的副极地北大西洋和区域密度变化的翻转之间的连接进行评估。重建结果表明，在密度空间上，东海盆对副极地翻转的贡献占主导地位，翻转的变化可达±2.5 Sv，这与OSNAP的翻转结果雅阁。在密度空间中，横穿海盆的纬向积分地转速度与蒙哥马利势中的边界差有关。盆地东侧的翻转与Irminger海和拉布拉多海的密度变化密切相关，而西侧的翻转与拉布拉多海的边界密度变化相关。这些边界密度
The connections between the overturning of the subpolar North Atlantic and regional density changes are assessed on interannual and decadal timescales using historical, data-based reconstructions of the overturning over the last 60 years and forward model integrations with buoyancy and wind forcing. The data-based reconstructions reveal a dominant eastern basin contribution to the subpolar overturning in density space and changes in the overturning reaching ±2.5 Sv, which are both in accord with the Overturning in the Subpolar North Atlantic Program (OSNAP). The zonally integrated geostrophic velocity across the basin is connected to boundary contrasts in Montgomery potential in density space. The overturning for the eastern side of the basin is strongly correlated with density changes in the Irminger and Labrador Seas, while the overturning for the western side is correlated with boundary density changes in the Labrador Sea. These boundary density