干旱区生态环境知识资源中心(Arid): The role of Southern Hemispheric Westerlies for Holocene hydroclimatic changes in the steppe of Tierra del Fuego (Argentina)

Arid

DOI	10.1016/j.quaint.2020.09.051
	The role of Southern Hemispheric Westerlies for Holocene hydroclimatic changes in the steppe of Tierra del Fuego (Argentina)
	Laprida, Cecilia; Orgeira, Maria Julia; Fernandez, Marilen; Tofalo, Rita; Mercau, Josefina Ramon; Silvestri, Gabriel E.; Berman, Ana Laura; Chapori, Natalia Garcia; Plastani, Maria Sofia; Alonso, Susana
通讯作者	Laprida, C (corresponding author), Univ Buenos Aires, Inst Estudios Andinos Don Pablo Groeber, Fac Ciencias Exactas & Nat, Ave Intendente Guiraldes 2160,Ciudad Univ,C1428EG, Buenos Aires, DF, Argentina.
来源期刊	QUATERNARY INTERNATIONAL
ISSN	1040-6182
EISSN	1873-4553
出版年	2021
卷号	571 页码:11-25
英文摘要	The steppe of northern Tierra del Fuego is an important region for studying climate variability in the Southern Hemisphere, due to its position at the southern margin of the Southern Hemisphere Westerly Wind belt. Here we present a multiproxy analysis of a sedimentary sequence from Laguna Carmen (53 degrees S, 68 degrees W) which provides evidence of the progressive aridity and strengthening of the low-level Westerlies during the Late Holocene. We identified three prominent phases in the climatic record from Laguna Carmen: a cold and wet period between-4000 cal. BP and-2200 cal. BP, evidenced by a relative high lake level, periodic runoff into the lake, and oligohaline (mean: 2554 mu S/cm) salinities; a step-change towards warmer and drier conditions after-2200 cal. BP, reflected by limited runoff and oligo-mesohaline salinities (mean: 4799 mu S/cm); and finally, the establishment of modern semi-arid conditions some time after-1000 cal. BP, when the lake became a shallow lake that sometimes dried out during the summer. Our results coincide with paleoclimatic numerical models that suggest a progressive aridification of the southern Patagonian steppe since 6000 cal. BP due to stronger Westerlies and higher temperatures associated with changes in solar irradiance.
英文关键词	Southern hemisphere westerly winds Multiproxy analysis Lithofacies Hydrological balance Diatoms Ostracods
类型	Article
语种	英语
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000612125700002
WOS关键词	LAGUNA POTROK-AIKE ; EASTERN PATAGONIA ; ATMOSPHERIC CO2 ; FRESH-WATER ; CLIMATE ; LAKE ; RECORD ; VARIABILITY ; SEDIMENTS ; CALIBRATION
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348111
作者单位	[Laprida, Cecilia; Mercau, Josefina Ramon; Chapori, Natalia Garcia] Univ Buenos Aires, Inst Estudios Andinos Don Pablo Groeber, Fac Ciencias Exactas & Nat, Ave Intendente Guiraldes 2160,Ciudad Univ,C1428EG, Buenos Aires, DF, Argentina; [Orgeira, Maria Julia; Tofalo, Rita; Alonso, Susana] Inst Geociencias Basicas Aplicadas & Ambientales, Ave Intendente Guiraldes 2160,Pabellon 2,Piso 1, Buenos Aires, DF, Argentina; [Fernandez, Marilen] Ctr Austral Invest Cient, Bernardo Houssay 200, Ushuaia, Tierra Del Fueg, Argentina; [Silvestri, Gabriel E.; Berman, Ana Laura] Ctr Invest Mar & Atmosfera, Dept Ciencias Atmosfera & Oceanos, Ciudad Univ,Pab 2,2 Piso,C1428EGA, Buenos Aires, DF, Argentina; [Plastani, Maria Sofia] Univ Buenos Aires, Dept Ciencias Geol, Fac Ciencias Exactas & Nat, Ave Intendente Guiraldes 2160,Ciudad Univ,C1428EG, Buenos Aires, DF, Argentina
推荐引用方式 GB/T 7714	Laprida, Cecilia,Orgeira, Maria Julia,Fernandez, Marilen,et al. The role of Southern Hemispheric Westerlies for Holocene hydroclimatic changes in the steppe of Tierra del Fuego (Argentina)[J],2021,571:11-25.
APA	Laprida, Cecilia.,Orgeira, Maria Julia.,Fernandez, Marilen.,Tofalo, Rita.,Mercau, Josefina Ramon.,...&Alonso, Susana.(2021).The role of Southern Hemispheric Westerlies for Holocene hydroclimatic changes in the steppe of Tierra del Fuego (Argentina).QUATERNARY INTERNATIONAL,571,11-25.
MLA	Laprida, Cecilia,et al."The role of Southern Hemispheric Westerlies for Holocene hydroclimatic changes in the steppe of Tierra del Fuego (Argentina)".QUATERNARY INTERNATIONAL 571(2021):11-25.