干旱区生态环境知识资源中心(Arid): Fluvial responses to external and internal forcing: Upper Holocene dynamics in a low latitude semi-arid region in South America

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DOI	10.1016/j.jsames.2021.103545
	Fluvial responses to external and internal forcing: Upper Holocene dynamics in a low latitude semi-arid region in South America
	Lima, Kleber Carvalho; Perez Filho, Archimedes; Lupinacci, Cenira Maria; Valezio, Everton Vinicius; Goes, Liliane Matos
通讯作者	Lima, KC (corresponding author), Univ Pernambuco UPE, Dept Geog, Campus Garanhuns, Recife, PE, Brazil.
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN	0895-9811
EISSN	1873-0647
出版年	2021
卷号	112
英文摘要	River streams are sensitive to environmental changes in drainage basins in response to external and internal forcing. These changes lead to drainage channel adjustments and may alter erosion-sedimentation cycles along valleys, as well as short and long term geomorphological evolution. Concerning the low latitude semi-arid region in South America, fluvial responses to environmental changes during the Upper Holocene have still not been adequately assessed, contrasting with evaluations in river drylands located in middle latitudes. To collaborate with assessments on Upper Holocene climatic fluctuations, alluvial deposits at the Itapicuru River, located in the Brazilian semi-arid, were analyzed to understand this river's dynamics in the last 5 ka and its relationship with both intrinsic and extrinsic factors. The following analyses were performed: [1] spatial terrace distribution throughout the river's longitudinal profile, [2] stratigraphic section assessments, [3] OSL dating, to estimate surface time elaboration, and [4] age correlations with regional paleoclimatic models. In the last 2.2 ka, downcutting and lateral migration occurred at the same time due to fluvial discharge changes over centuries and decades. Semi-arid conditions, such as those currently observed, prevailed throughout the drainage basin, with wet intervals identified upstream. Humidity variations were responsible for middle valley incision and deposition, forming terrace, bars, and natural levees. These findings indicate that, at least in our case study, intrinsic factors had big importance to control the fluvial dynamics since the establishment of the semi-arid low latitude climatic conditions.
英文关键词	Allogenic rivers Drylands OSL Dating Tropical zones Itapicuru River
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000701800800001
WOS关键词	ITAPICURU GREENSTONE-BELT ; CLIMATE-CHANGE ; TERRACE FORMATION ; RIVER-BASIN ; RAINFALL VARIABILITY ; NORTHEASTERN BRAZIL ; DRAINAGE-BASIN ; INCISION ; RECORD ; MODEL
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364034
作者单位	[Lima, Kleber Carvalho] Univ Pernambuco UPE, Dept Geog, Campus Garanhuns, Recife, PE, Brazil; [Perez Filho, Archimedes] Univ Estadual Campinas, UNICAMP, Inst Geosci, Dept Geog, Campinas, Brazil; [Lupinacci, Cenira Maria] Sao Paulo State Univ Julio de Mesquita UNESP, Dept Geog & Environm Planning, Campus Rio Claro, Sao Paulo, Brazil; [Valezio, Everton Vinicius] Univ Estadual Campinas, UNICAMP, Inst Geosci, Dept Geog, Campinas, Brazil; [Goes, Liliane Matos] Univ Bahia State UNEB, Dept Humanities, Campus Jacobina, Salvador, BA, Brazil
推荐引用方式 GB/T 7714	Lima, Kleber Carvalho,Perez Filho, Archimedes,Lupinacci, Cenira Maria,et al. Fluvial responses to external and internal forcing: Upper Holocene dynamics in a low latitude semi-arid region in South America[J],2021,112.
APA	Lima, Kleber Carvalho,Perez Filho, Archimedes,Lupinacci, Cenira Maria,Valezio, Everton Vinicius,&Goes, Liliane Matos.(2021).Fluvial responses to external and internal forcing: Upper Holocene dynamics in a low latitude semi-arid region in South America.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,112.
MLA	Lima, Kleber Carvalho,et al."Fluvial responses to external and internal forcing: Upper Holocene dynamics in a low latitude semi-arid region in South America".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 112(2021).