Late Holocene palaeotemperatures and palaeoenvironments in the Southeastern Brazilian coast inferred from otolith geochemistry
作者： Thayse Bertucci , Orangel Aguilera , Crisogono Vasconcelos , Gabriela Nascimento , Gabriela Marques
DOI: 10.1016/J.PALAEO.2018.04.030
关键词: Holocene 、 Upwelling 、 Waves and shallow water 、 Otolith 、 Oceanography 、 δ13C 、 δ18O 、 Geology
摘要: Abstract Holocene palaeoceanography and climatic reconstructions were evaluated based on proxy analyses of fish otoliths from shellmounds located along the coast Rio de Janeiro State, Brazil. Modern coastal seasonal upwelling is associated with ascension a deep cold-water mass as consequence persistent NE winds that affect climate in southeastern However, this influence effect palaeoenvironment shallow water are poorly known. In work, palaeotemperatures estimated geochemical otolith. The results δ18O δ13C otoliths, obtained separated by distance almost 200 km, show two distinctive otolith-derived palaeotemperature signals region under influence. Additionally, analysis suggests lived marine waters, showing similar microchemistry values composition when compared modern otoliths.
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