Sand dune activity in north-eastern Patagonia

Autores
del Valle, Hector Francisco; Rostagno, Cesar Mario; Coronato, Fernando Raul; Bouza, Pablo Jose; Blanco, Paula Daniela
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Valdes Peninsula has the most noticeable aeolian landforms of the Patagonian drylands. The southern sector of the peninsula is affected by the advance of several fronts of active sand dunes grouped in discrete megapatches. The objectives of the study were to: (1) analyse the morphology of sand dunes, and (2) measure the migration rates and orientation of the sand dunes along a 33-year period (1969-2002). These studies used a series of field techniques in conjunction with aerial photography and satellite data, such as AVIRIS and Landsat imagery. Four main types of active sand dune forms were identified: (1) compound linear; (2) compound transverse; (3) compound dome-shaped; and (4) complex dome-shaped. Because of the windy climate, dune mobility is high; there is an eastward migration to an average speed of 9.1±2.7 m yr-1. Despite this high rate and since observed changes in the total area of active dunes were small, active processes of vegetation encroachment are deducible. Thus, wind and effective rainfall appear as the main factors regulating the process, in short and long-term, respectively. Although the orientation and disposition of the dunefields is in agreement with the prevailing west winds, the active dunes present a variety of forms, which reflect local variations in the wind flow. The circulation is strongly influenced by the shape of the coastline and the actual existence of the dunefields is due to this friable windward coast found nowhere else in Patagonia.
Fil: del Valle, Hector Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Rostagno, Cesar Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Coronato, Fernando Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Bouza, Pablo Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Blanco, Paula Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Materia
ARGENTINA
COASTAL DUNEFIELD
DUNE MOBILITY
REMOTE SENSING
WIND REGIME
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/99855
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/99855
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Sand dune activity in north-eastern Patagoniadel Valle, Hector FranciscoRostagno, Cesar MarioCoronato, Fernando RaulBouza, Pablo JoseBlanco, Paula DanielaARGENTINACOASTAL DUNEFIELDDUNE MOBILITYREMOTE SENSINGWIND REGIMEhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Valdes Peninsula has the most noticeable aeolian landforms of the Patagonian drylands. The southern sector of the peninsula is affected by the advance of several fronts of active sand dunes grouped in discrete megapatches. The objectives of the study were to: (1) analyse the morphology of sand dunes, and (2) measure the migration rates and orientation of the sand dunes along a 33-year period (1969-2002). These studies used a series of field techniques in conjunction with aerial photography and satellite data, such as AVIRIS and Landsat imagery. Four main types of active sand dune forms were identified: (1) compound linear; (2) compound transverse; (3) compound dome-shaped; and (4) complex dome-shaped. Because of the windy climate, dune mobility is high; there is an eastward migration to an average speed of 9.1±2.7 m yr-1. Despite this high rate and since observed changes in the total area of active dunes were small, active processes of vegetation encroachment are deducible. Thus, wind and effective rainfall appear as the main factors regulating the process, in short and long-term, respectively. Although the orientation and disposition of the dunefields is in agreement with the prevailing west winds, the active dunes present a variety of forms, which reflect local variations in the wind flow. The circulation is strongly influenced by the shape of the coastline and the actual existence of the dunefields is due to this friable windward coast found nowhere else in Patagonia.Fil: del Valle, Hector Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Rostagno, Cesar Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Coronato, Fernando Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Bouza, Pablo Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Blanco, Paula Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaAcademic Press Ltd - Elsevier Science Ltd2008-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/99855del Valle, Hector Francisco; Rostagno, Cesar Mario; Coronato, Fernando Raul; Bouza, Pablo Jose; Blanco, Paula Daniela; Sand dune activity in north-eastern Patagonia; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 72; 4; 4-2008; 411-4220140-1963CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jaridenv.2007.07.011info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0140196307002170info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:58:15Zoai:ri.conicet.gov.ar:11336/99855instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:58:15.563CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Sand dune activity in north-eastern Patagonia
title Sand dune activity in north-eastern Patagonia
spellingShingle Sand dune activity in north-eastern Patagonia
del Valle, Hector Francisco
ARGENTINA
COASTAL DUNEFIELD
DUNE MOBILITY
REMOTE SENSING
WIND REGIME
title_short Sand dune activity in north-eastern Patagonia
title_full Sand dune activity in north-eastern Patagonia
title_fullStr Sand dune activity in north-eastern Patagonia
title_full_unstemmed Sand dune activity in north-eastern Patagonia
title_sort Sand dune activity in north-eastern Patagonia
dc.creator.none.fl_str_mv del Valle, Hector Francisco
Rostagno, Cesar Mario
Coronato, Fernando Raul
Bouza, Pablo Jose
Blanco, Paula Daniela
author del Valle, Hector Francisco
author_facet del Valle, Hector Francisco
Rostagno, Cesar Mario
Coronato, Fernando Raul
Bouza, Pablo Jose
Blanco, Paula Daniela
author_role author
author2 Rostagno, Cesar Mario
Coronato, Fernando Raul
Bouza, Pablo Jose
Blanco, Paula Daniela
author2_role author
author
author
author
dc.subject.none.fl_str_mv ARGENTINA
COASTAL DUNEFIELD
DUNE MOBILITY
REMOTE SENSING
WIND REGIME
topic ARGENTINA
COASTAL DUNEFIELD
DUNE MOBILITY
REMOTE SENSING
WIND REGIME
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Valdes Peninsula has the most noticeable aeolian landforms of the Patagonian drylands. The southern sector of the peninsula is affected by the advance of several fronts of active sand dunes grouped in discrete megapatches. The objectives of the study were to: (1) analyse the morphology of sand dunes, and (2) measure the migration rates and orientation of the sand dunes along a 33-year period (1969-2002). These studies used a series of field techniques in conjunction with aerial photography and satellite data, such as AVIRIS and Landsat imagery. Four main types of active sand dune forms were identified: (1) compound linear; (2) compound transverse; (3) compound dome-shaped; and (4) complex dome-shaped. Because of the windy climate, dune mobility is high; there is an eastward migration to an average speed of 9.1±2.7 m yr-1. Despite this high rate and since observed changes in the total area of active dunes were small, active processes of vegetation encroachment are deducible. Thus, wind and effective rainfall appear as the main factors regulating the process, in short and long-term, respectively. Although the orientation and disposition of the dunefields is in agreement with the prevailing west winds, the active dunes present a variety of forms, which reflect local variations in the wind flow. The circulation is strongly influenced by the shape of the coastline and the actual existence of the dunefields is due to this friable windward coast found nowhere else in Patagonia.
Fil: del Valle, Hector Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Rostagno, Cesar Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Coronato, Fernando Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Bouza, Pablo Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Blanco, Paula Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
description The Valdes Peninsula has the most noticeable aeolian landforms of the Patagonian drylands. The southern sector of the peninsula is affected by the advance of several fronts of active sand dunes grouped in discrete megapatches. The objectives of the study were to: (1) analyse the morphology of sand dunes, and (2) measure the migration rates and orientation of the sand dunes along a 33-year period (1969-2002). These studies used a series of field techniques in conjunction with aerial photography and satellite data, such as AVIRIS and Landsat imagery. Four main types of active sand dune forms were identified: (1) compound linear; (2) compound transverse; (3) compound dome-shaped; and (4) complex dome-shaped. Because of the windy climate, dune mobility is high; there is an eastward migration to an average speed of 9.1±2.7 m yr-1. Despite this high rate and since observed changes in the total area of active dunes were small, active processes of vegetation encroachment are deducible. Thus, wind and effective rainfall appear as the main factors regulating the process, in short and long-term, respectively. Although the orientation and disposition of the dunefields is in agreement with the prevailing west winds, the active dunes present a variety of forms, which reflect local variations in the wind flow. The circulation is strongly influenced by the shape of the coastline and the actual existence of the dunefields is due to this friable windward coast found nowhere else in Patagonia.
publishDate 2008
dc.date.none.fl_str_mv 2008-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/99855
del Valle, Hector Francisco; Rostagno, Cesar Mario; Coronato, Fernando Raul; Bouza, Pablo Jose; Blanco, Paula Daniela; Sand dune activity in north-eastern Patagonia; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 72; 4; 4-2008; 411-422
0140-1963
CONICET Digital
CONICET
url http://hdl.handle.net/11336/99855
identifier_str_mv del Valle, Hector Francisco; Rostagno, Cesar Mario; Coronato, Fernando Raul; Bouza, Pablo Jose; Blanco, Paula Daniela; Sand dune activity in north-eastern Patagonia; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 72; 4; 4-2008; 411-422
0140-1963
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jaridenv.2007.07.011
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0140196307002170
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Academic Press Ltd - Elsevier Science Ltd
publisher.none.fl_str_mv Academic Press Ltd - Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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