Journal article
Demons in the North Atlantic: Variability of deep ocean ventilation
- Abstract:
- 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Authors
- Publisher:
- Wiley
- Journal:
- Geophysical Research Letters More from this journal
- Volume:
- 48
- Issue:
- 9
- Article number:
- e2020GL092340
- Publication date:
- 2021-04-29
- Acceptance date:
- 2021-04-01
- DOI:
- EISSN:
-
1944-8007
- ISSN:
-
0094-8276
- Language:
-
English
- Keywords:
- Pubs id:
-
1172588
- Local pid:
-
pubs:1172588
- Deposit date:
-
2021-04-20
Terms of use
- Copyright holder:
- American Geophysical Union
- Copyright date:
- 2021
- Rights statement:
- © 2021. American Geophysical Union. All Rights Reserved.
- Notes:
- This is the accepted manuscript version of the article. The final version is available online from Wiley at: https://doi.org/10.1029/2020GL092340
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