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Other research product . Collection . 2023

Upper-ocean microstructure data from the tropical Angolan upwelling system

Körner, Mareike; Brandt, Peter; Dengler, Marcus;
Open Access
English
Published: 01 Jan 2023
Publisher: PANGAEA
Abstract

The tropical Angolan upwelling system is a highly productive ecosystem with a distinct seasonal cycle in surface temperature and primary production. The lowest sea surface temperature, strongest cross-shore temperature gradient, and maximum productivity occur in austral winter when seasonally prevailing upwelling favorable winds are weakest. A multi cruise dataset of microstructure profiles collected between 2013 and 2022 in the tropical Angolan upwelling system was used to analyze the importance of mixing for cooling of the mixed layer. The data were collected during six cruises on board of the R/V Meteor. The results show that cooling due to turbulent heat fluxes at the base of the mixed layer is an important cooling term. This turbulent cooling, that is strongest in shallow shelf regions, is capable of explaining the observed negative cross-shore temperature gradient.

Subjects

Benguela Niños: Physikalische Prozesse und langperiodische Variabilität (BANINO), Southwest African Coastal Upwelling System and Benguela Niños (SACUS/SACUS-II), Tropical and South Atlantic climate-based marine ecosystem predictions for sustainable management (TRIATLAS)

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Funded by
EC| NextGEMS
Project
NextGEMS
Next Generation Earth Modelling Systems
  • Funder: European Commission (EC)
  • Project Code: 101003470
  • Funding stream: H2020 | RIA-LS
,
EC| TRIATLAS
Project
TRIATLAS
Tropical and South Atlantic climate-based marine ecosystem predictions for sustainable management
  • Funder: European Commission (EC)
  • Project Code: 817578
  • Funding stream: H2020 | RIA
Related to Research communities
European Marine Science
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