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DOI | 10.1029/2020GL092340 |
Demons in the North Atlantic: Variability of deep ocean ventilation | |
G. A. MacGilchrist; H. L. Johnson; C. Lique; D. P. Marshall | |
2021-04-11 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Translation of atmospheric forcing variability into the ocean interior via ocean ventilation is an important aspect of transient climate change. On a seasonal timescale in the subtropics, this translation is mediated by a so‐called “Demon” that prevents access to all except late‐winter mixed‐layer water. Here, we use an eddy‐permitting numerical circulation model to investigate a similar process operating on longer (interannual) timescales in the subpolar North Atlantic. We find that variations in atmospheric forcing are mediated in their translation to the ocean interior, with year‐to‐year changes in the late‐winter mixed layer depth being the critical factor. The signature of persistent strong atmospheric forcing driving deep mixed layers is preferentially ventilated to the interior when the forcing is ceased. Susceptibility to this effect depends on the location and density of subduction — with the rate at which newly ventilated water escapes its region of subduction being the crucial factor. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/322015 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | G. A. MacGilchrist,H. L. Johnson,C. Lique,et al. Demons in the North Atlantic: Variability of deep ocean ventilation[J]. Geophysical Research Letters,2021. |
APA | G. A. MacGilchrist,H. L. Johnson,C. Lique,&D. P. Marshall.(2021).Demons in the North Atlantic: Variability of deep ocean ventilation.Geophysical Research Letters. |
MLA | G. A. MacGilchrist,et al."Demons in the North Atlantic: Variability of deep ocean ventilation".Geophysical Research Letters (2021). |
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