气候变化领域集成服务门户(CCPortal): Late Pleistocene to holocene palaeoclimates and palaeoenvironments inferred from palynofacies and dinoflagellates cysts in Santos Basin; offshore Brazil

CCPortal

DOI	10.1016/j.palaeo.2019.109385
	Late Pleistocene to holocene palaeoclimates and palaeoenvironments inferred from palynofacies and dinoflagellates cysts in Santos Basin; offshore Brazil
	Souza T.C.S.; Carvalho M.A.; Escamilla J.H.; Barreto C.F.; Freitas A.D.S.; Silva C.G.; Baptista Neto J.A.
发表日期	2020
ISSN	0031-0182
卷号	538
英文摘要	We analyse Late Pleistocene to Holocene palynofacies and dinoflagellates in a sedimentary core (PC PRIMA 4), collected on the northern offshore shelf of the Santos Basin of Brazil, which covers the last 29,429 cal yrs BP. The aim of this study is to better understand changes in climate and oceanographic circulation that affected this region since the Last Glacial Maximum (LGM), and the 120 m rise in sea level that followed. The organic matter in the core shows characteristics consistent with an oxygenized proximal shelf with incursions of continental elements, which evolved into a more distal dysaerobic-anoxic environment over the studied time interval. An increase in phytoclast (opaque and non-opaque) abundance during the Last Glacial Maximum interval suggests enhanced river supply, driven by the increase in the hydrological cycle resulting from cold and humid climatic conditions. The increase of Amorphous Organic Matter from 16,437 cal yrs BP suggests the onset of anoxic bottomwater conditions that resulted of an increase in water depth. Together with the percentage increase of Operculodinium centrocarpum and the fall in Tuberculodinium vancampoae abundance, this implies the postglacial development of warmer currents. In summary, our results better document the climatic and oceanographic changes that occurred in this area during and following the LGM. © 2019 Elsevier B.V.
英文关键词	Environmental changes; Holocene; Last glacial maximum; Organic matter input; Quaternary
语种	英语
scopus关键词	abundance; dinoflagellate; Holocene; hydrological cycle; Last Glacial Maximum; organic matter; paleoenvironment; Pleistocene; sea level; Atlantic Ocean; Brazil; Santos Basin; Dinophyceae; Operculodinium centrocarpum; Tuberculodinium vancampoae
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150651
作者单位	Instituto de Geociências, Departamento de Geologia e Geofísica Marinha, Universidade Federal Fluminense, Avenida General Milton Tavares de Souza, S/n, Niterói, RJ 24210346, Brazil; Laboratório de Paleoecologia Vegetal, Departamento de Geologia e Paleontologia, Museu Nacional, Universidade Federal Do Rio de Janeiro, Quinta da Boa Vista S/n, São Cristóvão, Rio de Janeiro, RJ 22040-040, Brazil; Departamento de Geología, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, Baja California 22860, Mexico
推荐引用方式 GB/T 7714	Souza T.C.S.,Carvalho M.A.,Escamilla J.H.,et al. Late Pleistocene to holocene palaeoclimates and palaeoenvironments inferred from palynofacies and dinoflagellates cysts in Santos Basin; offshore Brazil[J],2020,538.
APA	Souza T.C.S..,Carvalho M.A..,Escamilla J.H..,Barreto C.F..,Freitas A.D.S..,...&Baptista Neto J.A..(2020).Late Pleistocene to holocene palaeoclimates and palaeoenvironments inferred from palynofacies and dinoflagellates cysts in Santos Basin; offshore Brazil.Palaeogeography, Palaeoclimatology, Palaeoecology,538.
MLA	Souza T.C.S.,et al."Late Pleistocene to holocene palaeoclimates and palaeoenvironments inferred from palynofacies and dinoflagellates cysts in Santos Basin; offshore Brazil".Palaeogeography, Palaeoclimatology, Palaeoecology 538(2020).