Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Geology |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892015000400079 |
Resumo: | ABSTRACTDuring the past decades, there have been contrarian explanations for the formation and stabilization of coastal dunefields: while many authors believe the dunes formation would be enhanced by falling sea level, others argue that a rising or stable sea level context would be favorable. For Brazilian coastal dunefields, the second hypothesis seems to be more consistent with the luminescence ages found so far; however, most of these data were obtained without using the SAR protocol. Another point of concern is the role of climate change in the aeolian system, which is still not very clear. The aim of this paper is to try to clarify these two questions. To this end, five coastal dunefields were selected in central Santa Catarina coast. The remote sensing and dating results allowed the discrimination and mapping of at least four aeolian generations. Their age distribution in relation to the global curve of relative sea level variation during the Late Pleistocene allows us to suggest that the formation of Aeolian dunefields in the coastal context is supported by stable relative sea level. However, relative sea level is not the only determinant for the formation and preservation of the aeolian coastal dunes. Evidences of climatic control indicate that the initiation of dunefields would be favored by periods of less humidity while their stabilization would occur preferably during the periods of rain intensification, connected to monsoon activity. |
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Brazilian Journal of Geology |
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Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changesOSL-SAR datingDune stabilizationAeolian generations.ABSTRACTDuring the past decades, there have been contrarian explanations for the formation and stabilization of coastal dunefields: while many authors believe the dunes formation would be enhanced by falling sea level, others argue that a rising or stable sea level context would be favorable. For Brazilian coastal dunefields, the second hypothesis seems to be more consistent with the luminescence ages found so far; however, most of these data were obtained without using the SAR protocol. Another point of concern is the role of climate change in the aeolian system, which is still not very clear. The aim of this paper is to try to clarify these two questions. To this end, five coastal dunefields were selected in central Santa Catarina coast. The remote sensing and dating results allowed the discrimination and mapping of at least four aeolian generations. Their age distribution in relation to the global curve of relative sea level variation during the Late Pleistocene allows us to suggest that the formation of Aeolian dunefields in the coastal context is supported by stable relative sea level. However, relative sea level is not the only determinant for the formation and preservation of the aeolian coastal dunes. Evidences of climatic control indicate that the initiation of dunefields would be favored by periods of less humidity while their stabilization would occur preferably during the periods of rain intensification, connected to monsoon activity.Sociedade Brasileira de Geologia2015-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892015000400079Brazilian Journal of Geology v.45 suppl.1 2015reponame:Brazilian Journal of Geologyinstname:Sociedade Brasileira de Geologia (SBGEO)instacron:SBGEO10.1590/2317-4889201530143info:eu-repo/semantics/openAccessMendes,Vinícius RibauGiannini,Paulo César FonsecaGuedes,Carlos Conforti FerreiraDeWitt,ReginaAndrade,Helena Asmar de Abreueng2015-10-14T00:00:00Zoai:scielo:S2317-48892015000400079Revistahttp://bjg.siteoficial.ws/index.htmhttps://old.scielo.br/oai/scielo-oai.phpsbgsede@sbgeo.org.br||claudio.riccomini@gmail.com2317-46922317-4692opendoar:2015-10-14T00:00Brazilian Journal of Geology - Sociedade Brasileira de Geologia (SBGEO)false |
dc.title.none.fl_str_mv |
Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes |
title |
Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes |
spellingShingle |
Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes Mendes,Vinícius Ribau OSL-SAR dating Dune stabilization Aeolian generations. |
title_short |
Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes |
title_full |
Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes |
title_fullStr |
Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes |
title_full_unstemmed |
Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes |
title_sort |
Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes |
author |
Mendes,Vinícius Ribau |
author_facet |
Mendes,Vinícius Ribau Giannini,Paulo César Fonseca Guedes,Carlos Conforti Ferreira DeWitt,Regina Andrade,Helena Asmar de Abreu |
author_role |
author |
author2 |
Giannini,Paulo César Fonseca Guedes,Carlos Conforti Ferreira DeWitt,Regina Andrade,Helena Asmar de Abreu |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Mendes,Vinícius Ribau Giannini,Paulo César Fonseca Guedes,Carlos Conforti Ferreira DeWitt,Regina Andrade,Helena Asmar de Abreu |
dc.subject.por.fl_str_mv |
OSL-SAR dating Dune stabilization Aeolian generations. |
topic |
OSL-SAR dating Dune stabilization Aeolian generations. |
description |
ABSTRACTDuring the past decades, there have been contrarian explanations for the formation and stabilization of coastal dunefields: while many authors believe the dunes formation would be enhanced by falling sea level, others argue that a rising or stable sea level context would be favorable. For Brazilian coastal dunefields, the second hypothesis seems to be more consistent with the luminescence ages found so far; however, most of these data were obtained without using the SAR protocol. Another point of concern is the role of climate change in the aeolian system, which is still not very clear. The aim of this paper is to try to clarify these two questions. To this end, five coastal dunefields were selected in central Santa Catarina coast. The remote sensing and dating results allowed the discrimination and mapping of at least four aeolian generations. Their age distribution in relation to the global curve of relative sea level variation during the Late Pleistocene allows us to suggest that the formation of Aeolian dunefields in the coastal context is supported by stable relative sea level. However, relative sea level is not the only determinant for the formation and preservation of the aeolian coastal dunes. Evidences of climatic control indicate that the initiation of dunefields would be favored by periods of less humidity while their stabilization would occur preferably during the periods of rain intensification, connected to monsoon activity. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-08-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892015000400079 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892015000400079 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/2317-4889201530143 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Geologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Geologia |
dc.source.none.fl_str_mv |
Brazilian Journal of Geology v.45 suppl.1 2015 reponame:Brazilian Journal of Geology instname:Sociedade Brasileira de Geologia (SBGEO) instacron:SBGEO |
instname_str |
Sociedade Brasileira de Geologia (SBGEO) |
instacron_str |
SBGEO |
institution |
SBGEO |
reponame_str |
Brazilian Journal of Geology |
collection |
Brazilian Journal of Geology |
repository.name.fl_str_mv |
Brazilian Journal of Geology - Sociedade Brasileira de Geologia (SBGEO) |
repository.mail.fl_str_mv |
sbgsede@sbgeo.org.br||claudio.riccomini@gmail.com |
_version_ |
1752122398376722432 |