Rapid Restratification Processes Control Mixed Layer Turbulence and Phytoplankton Growth in a Deep Convection Region - Océanographie Physique, Littorale et Côtière ( (OPLC Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2024

Rapid Restratification Processes Control Mixed Layer Turbulence and Phytoplankton Growth in a Deep Convection Region

Mariana Miracca-Lage
Johannes Becherer
Anthony Bosse
Jeffrey Carpenter

Résumé

Abstract The Gulf of Lion, Northwestern Mediterranean Sea, is one of few oceanic regions where deep convection occurs. We investigate the restratification following a convection event using measurements from an ocean glider equipped with turbulence microstructure sensors. This unique combination of instruments provides a high‐resolution description of the mixed layer with regard to turbulence, stratification and chlorophyll. We observe a rapid restratification process that proceeds over a timescale of days to one week. We find that restratification exerts a leading order control on surface mixed layer turbulence variability, as abrupt changes in turbulence dissipation rates are associated with the formation of near‐surface stratification. The near‐surface formation of stratification occurs through both the diurnal variability in surface buoyancy fluxes and through lateral advective processes. We conclude that daily near‐surface processes that influence stratification control mixed layer turbulence levels, and thus the phytoplankton response in the critical transition period to spring bloom.
Fichier principal
Vignette du fichier
Geophysical Research Letters - 2024 - Miracca‐Lage - Rapid Restratification Processes Control Mixed Layer Turbulence and.pdf (2.45 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04650283 , version 1 (17-07-2024)

Licence

Identifiants

Citer

Mariana Miracca-Lage, Johannes Becherer, Lucas Merckelbach, Anthony Bosse, Pierre Testor, et al.. Rapid Restratification Processes Control Mixed Layer Turbulence and Phytoplankton Growth in a Deep Convection Region. Geophysical Research Letters, 2024, 51 (10), ⟨10.1029/2023gl107336⟩. ⟨hal-04650283⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More