Eddy Saturation of Equilibrated Circumpolar Currents
Eddy Saturation of Equilibrated Circumpolar Currents
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DOI：
10.1175/jpo-d-12-095.1
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发表时间：
2013-04
影响因子：
3.5
通讯作者：
D. Munday;H. Johnson;D. Marshall
中科院分区：
文献类型：
--
作者：
D. Munday;H. Johnson;D. Marshall
摘要
本研究利用海洋总环流模型的区域配置来检验环极输送和经向翻转对南大洋风应力和全球垂向混合变化的敏感性。在允许涡旋且更高的分辨率下，环极输送对强迫强度的敏感性大幅降低。在足够高的分辨率下，即使在无风的极限情况下，环极输送对风应力也几乎没有敏感性。相比之下，经向翻转环流继续随南大洋风应力变化，但在高风应力极限下敏感性降低。在所有模型分辨率下，环极输送和经向翻转都继续随垂向扩散率变化。在更高分辨率下，环极输送对垂向扩散率变化的敏感性降低，但敏感性始终存在。相比之下，翻转环流对垂向……的变化更敏感
AbstractThis study uses a sector configuration of an ocean general circulation model to examine the sensitivity of circumpolar transport and meridional overturning to changes in Southern Ocean wind stress and global diapycnal mixing. At eddy-permitting, and finer, resolution, the sensitivity of circumpolar transport to forcing magnitude is drastically reduced. At sufficiently high resolution, there is little or no sensitivity of circumpolar transport to wind stress, even in the limit of no wind. In contrast, the meridional overturning circulation continues to vary with Southern Ocean wind stress, but with reduced sensitivity in the limit of high wind stress. Both the circumpolar transport and meridional overturning continue to vary with diapycnal diffusivity at all model resolutions. The circumpolar transport becomes less sensitive to changes in diapycnal diffusivity at higher resolution, although sensitivity always remains. In contrast, the overturning circulation is more sensitive to change in diapycnal...