气候变化领域集成服务门户(CCPortal): Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record

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DOI	10.1016/j.palaeo.2019.01.013
	Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record
	Torres G.R.; Pérez C.F.; Lupo L.C.
发表日期	2019
ISSN	0031-0182
起始页码	66
结束页码	77
卷号	520
英文摘要	The presence of pollen from Yungas tree species in fossil sequences located above the tree-line has led to alternative interpretations of past climate changes in tropical and subtropical Andes. We studied atmospheric and surface pollen deposition rates of Yungas trees along an altitudinal gradient (1700–3800 m a.s.l.) to understand the role of local wind patterns in modern pollen transport to mountain regions. Pollen from the Montane forest (Alnus and Juglans) and the Montane rainforest (Anadenanthera, Celtis and Myrtaceae) becomes airborne and is transported upslope well above the tree-line. The resulting patterns of pollen deposition show a secondary maximum in the Montane grassland, consistent with the development of a mountain-valley breeze system during the flowering period of the pollen producer species. Given that the pattern is also preserved in the surface sediment, we propose that these tree pollen types are good indicators of mesoscale atmospheric circulation and could provide a proxy for this circulation system in Quaternary records. This alternative approach to interpreting fossil pollen records of Yungas species in highlands of the Central Andes has implications for regional reconstructions of past climate. © 2019 Elsevier B.V.
英文关键词	Local wind; Palaeoenvironment; Pollen tracers; Subtropical Andes; Vegetation zones
语种	英语
scopus关键词	altitude; atmospheric circulation; deciduous tree; fossil record; mountain region; paleoclimate; paleoenvironment; pollen; Quaternary; rainforest; subtropical region; treeline; vegetation cover; Andes; Argentina; Alnus; Anadenanthera; Celtis; Juglans; Myrtaceae
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/151032
作者单位	Laboratorio de Palinología, Facultad de Ciencias Agrarias, Universidad Nacional de Jujuy Instituto de Ecorregiones Andinas-CONICET/UNJu, Alberdi 47Jujuy 4600, Argentina; Departamento de Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires-CONICET, Pabellón II, 2° piso, Ciudad Universitaria, Buenos Aires, 1428, Argentina
推荐引用方式 GB/T 7714	Torres G.R.,Pérez C.F.,Lupo L.C.. Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record[J],2019,520.
APA	Torres G.R.,Pérez C.F.,&Lupo L.C..(2019).Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record.Palaeogeography, Palaeoclimatology, Palaeoecology,520.
MLA	Torres G.R.,et al."Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record".Palaeogeography, Palaeoclimatology, Palaeoecology 520(2019).