期刊
GEOPHYSICAL RESEARCH LETTERS
卷 42, 期 10, 页码 4014-4022出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL063561
关键词
Last Glacial Maximum; ocean circulation; tidal mixing
资金
- National Science Foundation [OCE-1131834]
- Physical Oceanography program [OCE-1260680]
- Climate Change Consortium for Wales
- Natural Environmental Research Council [NE/F014821/1]
- Fujitsu Europe through HPC Wales
- Division Of Ocean Sciences
- Directorate For Geosciences [1260680] Funding Source: National Science Foundation
- Natural Environment Research Council [NE/F014821/1] Funding Source: researchfish
- NERC [NE/F014821/1] Funding Source: UKRI
Due to lower sea levels during the Last Glacial Maximum (LGM), tidal energy dissipation was shifted from the shallow margins into the deep ocean. Here using a high-resolution tide model, we estimate that global energy fluxes below 200m depth were almost quadrupled during the LGM. Applying the energy fluxes to a consistent tidal mixing parameterization of a global climate model results in a large intensification of mixing. Global mean vertical diffusivity increases by more than a factor of 3, and consequently, the simulated meridional overturning circulation accelerates by similar to 21-46%. In the model, these effects are at least as important as those from changes in surface boundary conditions. Our findings contrast with the prevailing view that the abyssal LGM circulation was more sluggish. We conclude that changes in tidal mixing are an important mechanism that may have strongly increased the glacial deep ocean circulation and should no longer be neglected in paleoclimate simulations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据