Transport pathways across the West African Monsoon as revealed by Lagrangian Coherent Structures

The West African Monsoon (WAM) system is the main source of rainfall in the agriculturally based region of the Sahel. Understanding transport across the WAM is of crucial importance due to the strong impact of humidity and dust pathways on local cloud formation. However, the description of this tran...

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Detalles Bibliográficos
Autores: Niang, Coumba, Mancho, Ana María, García Garrido, Víctor José, Mohino Harris, Elsa, Rodríguez De Fonseca, María Belén, Curbelo, Jezabel
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/6535
Acceso en línea:https://hdl.handle.net/20.500.14352/6535
Access Level:acceso abierto
Palabra clave:52
Phase-spaces structures
Southerns stratosphere
Seasonal evolution
Moisture
Climatology
Descriptors
Dust
Precipitation
Circulation
Reanalysis
Física atmosférica
2501 Ciencias de la Atmósfera
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oai_identifier_str oai:docta.ucm.es:20.500.14352/6535
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spelling Transport pathways across the West African Monsoon as revealed by Lagrangian Coherent StructuresNiang, CoumbaMancho, Ana MaríaGarcía Garrido, Víctor JoséMohino Harris, ElsaRodríguez De Fonseca, María BelénCurbelo, Jezabel52Phase-spaces structuresSoutherns stratosphereSeasonal evolutionMoistureClimatologyDescriptorsDustPrecipitationCirculationReanalysisFísica atmosférica2501 Ciencias de la AtmósferaThe West African Monsoon (WAM) system is the main source of rainfall in the agriculturally based region of the Sahel. Understanding transport across the WAM is of crucial importance due to the strong impact of humidity and dust pathways on local cloud formation. However, the description of this transport is challenging due to its 3D complex nature. Lagrangian Coherent Structures (LCS) simplify transport description across the WAM by providing a geometrical partition of the troposphere into domains. Air parcels within each domain have similar dynamical characteristics. LCS make it possible to achieve an integrated vision of transport pathways across this system. Using this approach we unveil new connections in the WAM system. In particular, we identify transport pathways between the Tropical Easterly Jet (TEJ) and the African Easterly Jet (AEJ). Furthermore, the clockwise circulation associated with the divergent upper part of the Sahara heat low is clearly delimitated. Additionally, we show the presence of mixing regions in the AEJ and the lower part of the TEJ that are linked to pathways to sources of dust and humidity.Nature Publishing GroupUniversidad Complutense de Madrid20202020-07-2720202020-07-27journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/6535reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/65352026-06-02T12:44:21Z
dc.title.none.fl_str_mv Transport pathways across the West African Monsoon as revealed by Lagrangian Coherent Structures
title Transport pathways across the West African Monsoon as revealed by Lagrangian Coherent Structures
spellingShingle Transport pathways across the West African Monsoon as revealed by Lagrangian Coherent Structures
Niang, Coumba
52
Phase-spaces structures
Southerns stratosphere
Seasonal evolution
Moisture
Climatology
Descriptors
Dust
Precipitation
Circulation
Reanalysis
Física atmosférica
2501 Ciencias de la Atmósfera
title_short Transport pathways across the West African Monsoon as revealed by Lagrangian Coherent Structures
title_full Transport pathways across the West African Monsoon as revealed by Lagrangian Coherent Structures
title_fullStr Transport pathways across the West African Monsoon as revealed by Lagrangian Coherent Structures
title_full_unstemmed Transport pathways across the West African Monsoon as revealed by Lagrangian Coherent Structures
title_sort Transport pathways across the West African Monsoon as revealed by Lagrangian Coherent Structures
dc.creator.none.fl_str_mv Niang, Coumba
Mancho, Ana María
García Garrido, Víctor José
Mohino Harris, Elsa
Rodríguez De Fonseca, María Belén
Curbelo, Jezabel
author Niang, Coumba
author_facet Niang, Coumba
Mancho, Ana María
García Garrido, Víctor José
Mohino Harris, Elsa
Rodríguez De Fonseca, María Belén
Curbelo, Jezabel
author_role author
author2 Mancho, Ana María
García Garrido, Víctor José
Mohino Harris, Elsa
Rodríguez De Fonseca, María Belén
Curbelo, Jezabel
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Phase-spaces structures
Southerns stratosphere
Seasonal evolution
Moisture
Climatology
Descriptors
Dust
Precipitation
Circulation
Reanalysis
Física atmosférica
2501 Ciencias de la Atmósfera
topic 52
Phase-spaces structures
Southerns stratosphere
Seasonal evolution
Moisture
Climatology
Descriptors
Dust
Precipitation
Circulation
Reanalysis
Física atmosférica
2501 Ciencias de la Atmósfera
description The West African Monsoon (WAM) system is the main source of rainfall in the agriculturally based region of the Sahel. Understanding transport across the WAM is of crucial importance due to the strong impact of humidity and dust pathways on local cloud formation. However, the description of this transport is challenging due to its 3D complex nature. Lagrangian Coherent Structures (LCS) simplify transport description across the WAM by providing a geometrical partition of the troposphere into domains. Air parcels within each domain have similar dynamical characteristics. LCS make it possible to achieve an integrated vision of transport pathways across this system. Using this approach we unveil new connections in the WAM system. In particular, we identify transport pathways between the Tropical Easterly Jet (TEJ) and the African Easterly Jet (AEJ). Furthermore, the clockwise circulation associated with the divergent upper part of the Sahara heat low is clearly delimitated. Additionally, we show the presence of mixing regions in the AEJ and the lower part of the TEJ that are linked to pathways to sources of dust and humidity.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-07-27
2020
2020-07-27
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/6535
url https://hdl.handle.net/20.500.14352/6535
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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