Impact of Chlorophyll Shading on the Peruvian Upwelling System.

Echevin, V. , Hauschildt, Jaard, Colas, F. , Thomsen, S. and Aumont, O. (2021) Impact of Chlorophyll Shading on the Peruvian Upwelling System. Open Access Geophysical Research Letters, 48 (19). Art.Nr. e2021GL094429. DOI 10.1029/2021GL094429.

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The influence of chlorophyll shading on ocean dynamics has been usually disregarded in eastern boundary upwelling systems modeling studies in spite of their very high primary productivity. Here, we study how this effect impacts on the Peru upwelling system using a regional mesoscale-resolving physical biogeochemical coupled model. We show that the shading effect leads to a surface cooling of up to 1°C on the shelf due to subsurface cooling of the source waters during their transit toward the shelf. The shading effect leads to a more realistic subsurface stratification, a slowdown of the alongshore currents, and a shoaling of the oxycline. Impacts on the regional model biases show that the shading effect needs to be taken into account in both physical and coupled physical-biogeochemical regional models of upwelling systems.

Document Type: Article
Funder compliance: info:eu-repo/grantAgreement/EC/H2020/749699
Keywords: Biogeochemicals; Coupled models; Meso scale; Modelling studies; Ocean dynamics; Primary productivity; Regional modelling; Shading effect; System models; Upwelling systems
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
OceanRep > SFB 754
Main POF Topic: PT6: Marine Life
Refereed: Yes
Open Access Journal?: No
Publisher: AGU (American Geophysical Union), Wiley
Related URLs:
Projects: SFB754, WACO
Date Deposited: 25 Oct 2021 08:10
Last Modified: 08 Feb 2023 09:25

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