干旱区生态环境知识资源中心(Arid): Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years

Arid

DOI	10.1016/j.palaeo.2019.03.037
	Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years
	Cesar Speranza, Flavio 1,5; Giralt, Santiago 2; Concepcion Lupo, Liliana 3,4; Jose Kulemeyer, Julio 3,5,6,7; de los Angeles Pereira, Elizabeth 3; Claramunt Lopez, Bernat 8,9
通讯作者	Cesar Speranza, Flavio
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2019
卷号	524 页码:85-100
英文摘要	In this paper, we analyze the paleoclimatic and paleoenvironmental evolution of Laguna Yema in semi-arid Chaco region of Argentina over the past six hundred years. High resolution multiproxy studies of lake sediments utilize analyses of lithology, mineralogy, geochemistry, palynology, and are constrained by radiocarbon and gamma spectrometry dating. Laguna Yema sediments were mainly composed of well stratified fine sediments (silts and clays), with variable proportions of quartz, clays (illite) and feldspar (microcline and albite). Twelve light and heavy geochemical elements were registered. Most elements (Al, Si, K, Ti, Fe, Rb, Ba, and Br) are associated with illite and albite. Different material transport processes related to the changes in aridity and humidity of the basin were identified using the main mineralogical origins of geochemical elements. Palynological records indicate cycles of contraction and expansion of the lake, with an increase in concentration of Alternanthera aquatica during wet periods (expansion of lake), and an increase in Ambrosia, Poaceae and fern spores during dry periods (contraction of lake). These changes are linked to fluctuations in moisture conditions in the Subandean Mountains and semi-arid Chaco regions, in response to interactions between the South American Monsoon System (SAMS) and the South American Low Level Jet (SALLJ), which send warm and humid air to northern Argentina. In a regional context, the Laguna Yema records are in accordance with the analyses of the temporal and spatial pattern of moisture distribution for the last six centuries.
英文关键词	Palynology Sedimentology Bermejo basin South American Monsoon System South American Arid Diagonal South American Low Level Jet
类型	Article
语种	英语
国家	Argentina ; Spain
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000469154700008
WOS关键词	RADIOCARBON AGE CALIBRATION ; HYDROLOGICAL VARIABILITY ; SOUTHERN ALTIPLANO ; LATE QUATERNARY ; CLIMATE ; SEDIMENTS ; PATTERNS ; HISTORY ; NORTH ; INTCAL13
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217866
作者单位	1.Inst Nacl Tecnol Agr, RN 34 Km 1286, RA-4518 Yuto, Jujuy, Argentina; 2.CSIC, Inst Earth Sci Jaume Almera ICTJA, C Lluis Sole i Sabaris S-N, E-08028 Barcelona, Spain; 3.Univ Nacl Jujuy, CONICET, Inst Ecorreg Andinas INECOA, Ave Bolivia 1239, RA-4600 San Salvador De Jujuy, Jujuy, Argentina; 4.Univ Nacl Jujuy, Fac Ciencias Agr, Catedra Ecol Gen, Lab Palinol, Alberdi 47, RA-4600 San Salvador De Jujuy, Jujuy, Argentina; 5.Univ Nacl Jujuy, Fac Ciencias Agr, Catedra Ciencias Tierra, San Salvador De Jujuy, Argentina; 6.Univ Nacl Jujuy, Fac Ingn, Catedra Suelos, Italo Palanca 10, RA-4600 San Salvador De Jujuy, Jujuy, Argentina; 7.UNJu, CONICET, UNT, InDyA, Ave Gral Martijena S-N, Palpala, Jujuy, Argentina; 8.Univ Autonoma Barcelona, CREAF, Fac Ciencies, Edifici C, Barcelona, Catalonia, Spain; 9.Univ Autonoma Barcelona, Dept Biol Anim Biol Vegetal & Ecol, Unitat Ecol, Fac Ciencies, Edifici C, Barcelona, Spain
推荐引用方式 GB/T 7714	Cesar Speranza, Flavio,Giralt, Santiago,Concepcion Lupo, Liliana,et al. Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years[J],2019,524:85-100.
APA	Cesar Speranza, Flavio,Giralt, Santiago,Concepcion Lupo, Liliana,Jose Kulemeyer, Julio,de los Angeles Pereira, Elizabeth,&Claramunt Lopez, Bernat.(2019).Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,524,85-100.
MLA	Cesar Speranza, Flavio,et al."Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 524(2019):85-100.