气候变化领域集成服务门户(CCPortal): Multisequal aeolian deposition during the Holocene in southwestern Patagonia (51°S) was modulated by southern westerly wind intensity and vegetation type

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DOI	10.1016/j.quascirev.2024.108616
	Multisequal aeolian deposition during the Holocene in southwestern Patagonia (51°S) was modulated by southern westerly wind intensity and vegetation type
	Flores-Aqueveque, V.; Villasenor, T.; Gomez-Fontealba, C.; Alloway, B. V.; Alfaro, S.; Pizarro, H.; Guerra, L.; Moreno, P. I.
发表日期	2024
ISSN	0277-3791
EISSN	1873-457X
起始页码	331
卷号	331
英文摘要	We studied a multisequal soil succession (MSS) just south of Torres del Paine National Park (51 degrees S), at the presentday core of the Southern Westerly Winds (SWW). The Rio Serrano Section comprises paleosol horizons with associated intervening loess and sandy loess beds formed during the Holocene. Our record suggests strong and stable aeolian activity between -9.3 -7.2 ka followed by a decline with centennial-scale variations until -5 ka. A strengthening commenced at -5 ka and culminated in a maximum between -2.2 -0.5 ka with millennial-scale variations. Subsequent weakening of aeolian activity between -0.5 and 0 ka was coeval with the deposition of a -40 cm-thick paleosol, after which aeolian activity increased abruptly and reached an unprecedented maximum starting in the mid-20th century. The inferred wind intensity variations from our data bear partial agreement with competing hypotheses of SWW evolution, which postulate minimum SWW influence in SW Patagonia during the early Holocene and maximum influence during the Late Holocene, or vice versa. When analyzed through the lens of vegetation physiognomy/distribution and associated hydrological balance inferences from neighboring sites, our results suggest a primary control by precipitation and wind speeds associated to SWW strength at regional scale, modulated by the position of the forest/steppe ecotone east of the austral Andes. Human activities during the mid-20th century (deforestation, fire -regime shifts, livestock grazing, land use changes) caused an unprecedented increase in aeolian activity through decreased vegetation cover that increased sediment availability for aeolian transport, marking a striking difference with the magnitude of natural processes before the Anthropocene. Our results highlight the importance of climate change and natural/human-driven changes in vegetation cover for deciphering wind intensity histories, particularly in the transition from humid to semiarid environments along the eastern slope of the southern Patagonian Andes.
英文关键词	Multisequal soil sequence; Wind reconstruction; Southern westerly winds; Holocene; Loess-paleosol sequence; Southwestern patagonia; Vegetation cover; Land use changes; Aeolian processes; Human-induced changes
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001218398100001
来源期刊	QUATERNARY SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303746
作者单位	Universidad de Chile; Universidad de O'Higgins; Pontificia Universidad Catolica de Chile; Universite Paris-Est-Creteil-Val-de-Marne (UPEC); Universite Paris Cite; Universite Gustave-Eiffel; Centre National de la Recherche Scientifique (CNRS); Universite Paris-Est-Creteil-Val-de-Marne (UPEC); Universidad Catolica del Norte; Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); National University of Cordoba; Universidad de Chile
推荐引用方式 GB/T 7714	Flores-Aqueveque, V.,Villasenor, T.,Gomez-Fontealba, C.,et al. Multisequal aeolian deposition during the Holocene in southwestern Patagonia (51°S) was modulated by southern westerly wind intensity and vegetation type[J],2024,331.
APA	Flores-Aqueveque, V..,Villasenor, T..,Gomez-Fontealba, C..,Alloway, B. V..,Alfaro, S..,...&Moreno, P. I..(2024).Multisequal aeolian deposition during the Holocene in southwestern Patagonia (51°S) was modulated by southern westerly wind intensity and vegetation type.QUATERNARY SCIENCE REVIEWS,331.
MLA	Flores-Aqueveque, V.,et al."Multisequal aeolian deposition during the Holocene in southwestern Patagonia (51°S) was modulated by southern westerly wind intensity and vegetation type".QUATERNARY SCIENCE REVIEWS 331(2024).