63 research outputs found
Physical characterization of a watershed through GIS: a study in the Schmidt stream, Brazil
Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes
During 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
Caracterização sedimentológica da planície intertidal da parte sul do saco do Limoeiro (Ilha do Mel - Paraná - Brasil): I. implicações ecológicas
Upper montane grassland structure within six subranges of Serra do Mar, Southern Brazil
Reply to the comments of Assine et al. (Comments on paper by M. Arai "Aptian/Albian (Early Cretaceous) paleogeography of the South Atlantic: a paleontological perspective")
Macro e micromorfologia de ferricretes nodulares desenvolvidos de arenito do grupo Bauru, formação Adamantina
Floristic surveys of Restinga Forests in southern Bahia, Brazil, reveal the effects of geography on community composition
Análise de componentes principais de atributos físicos, químicos e mineralógicos de solos do bioma cerrado
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