Surface cooling caused by rare but intense near-inertial wave induced mixing in the tropical Atlantic.

Hummels, Rebecca , Dengler, Marcus , Rath, Willi , Foltz, Gregory R., Schütte, Florian, Fischer, Tim and Brandt, Peter (2020) Surface cooling caused by rare but intense near-inertial wave induced mixing in the tropical Atlantic. Open Access Nature Communications, 11 (1). Art.Nr. 3829. DOI 10.1038/s41467-020-17601-x.

[img]
Preview
Text
s41467-020-17601-x.pdf - Published Version
Available under License Creative Commons: Attribution 4.0.

Download (6Mb) | Preview
[img]
Preview
Text
41467_2020_17601_MOESM1_ESM.pdf - Supplemental Material
Available under License Creative Commons: Attribution 4.0.

Download (622Kb) | Preview
[img]
Preview
Text (Pressemeldung)
pm_2020_36_vermischung-tropen.pdf - Supplemental Material
Available under License Creative Commons: Attribution 4.0.

Download (192Kb) | Preview
[img]
Preview
Text (Press release)
pm_2020_36_mixing-tropics_en.pdf - Supplemental Material
Available under License Creative Commons: Attribution 4.0.

Download (395Kb) | Preview

Supplementary data:

Abstract

The direct response of the tropical mixed layer to near-inertial waves (NIWs) has only rarely been observed. Here, we present upper-ocean turbulence data that provide evidence for a strongly elevated vertical diffusive heat flux across the base of the mixed layer in the presence of a NIW, thereby cooling the mixed layer at a rate of 244 W m−2 over the 20 h of continuous measurements. We investigate the seasonal cycle of strong NIW events and find that despite their local intermittent nature, they occur preferentially during boreal summer, presumably associated with the passage of atmospheric African Easterly Waves. We illustrate the impact of these rare but intense NIW induced mixing events on the mixed layer heat balance, highlight their contribution to the seasonal evolution of sea surface temperature, and discuss their potential impact on biological productivity in the tropical North Atlantic.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-OD Ocean Dynamics
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
OceanRep > SFB 754
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.1038/s41467-020-17601-x
ISSN: 2041-1723
Related URLs:
Projects: PIRATA, SFB754, FOR1740, RACE, TRIATLAS
Expeditions/Models/Experiments:
Date Deposited: 06 Aug 2020 12:17
Last Modified: 21 Aug 2020 09:02
URI: http://oceanrep.geomar.de/id/eprint/50282

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...