Tropical Atlantic mixed layer buoyancy seasonality: atmospheric and oceanic physical processes contributions

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dc.contributor.authorCamara, Ibrahima
dc.contributor.authorMignot, Juliette
dc.contributor.authorKolodziejczyk, Nicolas
dc.contributor.authorLosada Doval, Teresa
dc.contributor.authorLazar, Alban
dc.date.accessioned2023-06-16T15:23:04Z
dc.date.available2023-06-16T15:23:04Z
dc.date.issued2020-06
dc.description© 2020 by the authors. The authors thank the Laboratoire de Physique de l’Atmosphère et de l’Océan Siméon Fongang (LPAO-SF) of the University Cheikh Anta Diop de Dakar where the work was mainly done. The editor and the anonymous reviewers are also sincerely thanked for their valuable comments and suggestions to improve the quality of the paper. : IRD, grant number 182SNLMIE2, funded this research. This study was also supported by the CNES TOSCA SMOS OCEAN project.
dc.description.abstractThis study investigates the physical processes controlling the mixed layer buoyancy using a regional configuration of an ocean general circulation model. Processes are quantified by using a linearized equation of state, a mixed-layer heat, and a salt budget. Model results correctly reproduce the observed seasonal near-surface density tendencies. The results indicate that the heat flux is located poleward of 10◦ of latitude, which is at least three times greater than the freshwater flux that mainly controls mixed layer buoyancy. During boreal spring-summer of each hemisphere, the freshwater flux partly compensates the heat flux in terms of buoyancy loss while, during the fall-winter, they act together. Under the seasonal march of the Inter-tropical Convergence Zone and in coastal areas affected by the river, the contribution of ocean processes on the upper density becomes important. Along the north Brazilian coast and the Gulf of Guinea, horizontal and vertical processes involving salinity are the main contributors to an upper water change with a contribution of at least twice as much the temperature. At the equator and along the Senegal-Mauritanian coast, vertical processes are the major oceanic contributors. This is mainly due to the vertical gradient of temperature at the mixed layer base in the equator while the salinity one dominates along the Senegal-Mauritania coast.
dc.description.departmentDepto. de Física de la Tierra y Astrofísica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipthe Laboratoire de Physique de l’Atmosphère et de l’Océan Siméon Fongang (LPAO-SF) of the University Cheikh Anta Diop de Dakar
dc.description.sponsorshipThe IRD
dc.description.sponsorshipthe CNES
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/62145
dc.identifier.doi10.3390/atmos11060649
dc.identifier.issn2073-4433
dc.identifier.officialurlhttp://dx.doi.org/10.3390/atmos11060649
dc.identifier.relatedurlhttps://www.mdpi.com/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/6541
dc.issue.number6
dc.journal.titleAtmosphere
dc.language.isoeng
dc.publisherMDPI AG
dc.relation.projectID182SNLMIE2
dc.relation.projectIDCNES TOSCA SMOS OCEAN
dc.rightsAtribución 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/es/
dc.subject.cdu52
dc.subject.keywordSea-surface salinity
dc.subject.keywordWater mass transformation
dc.subject.keywordTemperature
dc.subject.keywordSubduction
dc.subject.keywordBalance
dc.subject.ucmFísica atmosférica
dc.subject.unesco2501 Ciencias de la Atmósfera
dc.titleTropical Atlantic mixed layer buoyancy seasonality: atmospheric and oceanic physical processes contributions
dc.typejournal article
dc.volume.number11
dspace.entity.typePublication
relation.isAuthorOfPublicationa3494605-922c-4914-8015-fb37bf6f596a
relation.isAuthorOfPublication.latestForDiscoverya3494605-922c-4914-8015-fb37bf6f596a
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