| Full text | |
| Author(s): |
Vinícius Ribau Mendes
[1]
;
Paulo César Fonseca Giannini
[2]
;
Carlos Conforti Ferreira Guedes
[3]
;
Regina DeWitt
[4]
;
Helena Asmar de Abreu Andrade
[5]
Total Authors: 5
|
| Affiliation: | [1] Universidade de São Paulo - USP. Geoscience Institute - Brasil
[2] Universidade de São Paulo - USP. Geoscience Institute. Geology Department - Brasil
[3] Universidade Federal de São Paulo - UNIFESP. Marine Institute. Department of Marine Sciences - Brasil
[4] East Carolina University. Department of Physics - Estados Unidos
[5] Universidade de São Paulo - USP. Geoscience Institute - Brasil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | BRAZILIAN JOURNAL OF GEOLOGY; v. 45, p. 79-95, 2015-08-00. |
| Abstract | |
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. (AU) | |
| FAPESP's process: | 09/54232-4 - Morphodynamics and chronology of quaternary aeolian depositional systems in Brazil |
| Grantee: | Paulo César Fonseca Giannini |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 09/53988-8 - Acquisition of a luminescence dating system and a precision microsampler for the study of environmental changes in the Quaternary period |
| Grantee: | Paulo César Fonseca Giannini |
| Support Opportunities: | Multi-user Equipment Program |