Arid
DOI10.1127/njgpa/2015/0502
Last millennial environmental reconstruction based on a multi-proxy record from Laguna Nassau, Western Pampas, Argentina
Vilanova, Isabel1; Schittek, Karsten2; Geilenkirchen, Mathias2; Schaebitz, Frank2; Schulz, Wilfried2
通讯作者Vilanova, Isabel
来源期刊NEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN
ISSN0077-7749
出版年2015
卷号277期号:2页码:209-224
英文摘要

We present a multi-proxy record from Laguna Nassau (LN), a shallow lake which developed in a blowout depression in the semi-arid sandy lowlands of the Western Pampas of Argentina. This multi-proxy stacked record reveals the evolution of an incipient water body subjected to warm and dry conditions from similar to 900 to 770 cal yr BP, an interval that is coeval with the Medieval Climatic Anomaly (MCA) period. Vegetation was dominated locally by Typha, and regionally by the Espinal, represented by Celtis, along with psammophytic-halophytic communities in sand dunes and lowlands. After that, variable water-depths and unstable conditions occurred in the water body in relation to dry and humid climatic phases until similar to 200 cal yr BP, likely related to a transition from warm and dry conditions, corresponding to the MCA, to a colder and wet climatic setting during a period concurrent with the Little Ice Age (LIA). This water body evolved into a shallow lake since then, with a more stable and higher water level, and regional vegetation characterized by the Espinal and psammophytic-halophytic communities mantling and stabilizing the nearby sand dunes. This evolution suggests complex hydrological responses of LN likely associated with its sensitivity to climatic variability. Our results highlight important contrasts in hydrologic balance during the MCA and LIA along the western and northeastern Pampas, suggesting important shifts mainly in the South-American Summer Monsoon at centennial timescales over the last millennium.


英文关键词Western Pampas Argentina blowout depression late Holocene multi-proxy record climate change paleoenvironments dune field Medieval Climate Anomaly Little Ice Age
类型Article
语种英语
国家Argentina ; Germany
收录类别SCI-E
WOS记录号WOS:000359293000008
WOS关键词SOUTH-AMERICA ; SAN-LUIS ; HOLOCENE ; VARIABILITY ; DEPOSITION ; HISTORY ; CLIMATE ; REGION
WOS类目Paleontology
WOS研究方向Paleontology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/189354
作者单位1.Consejo Nacl Invest Cient & Tecn, Museo Argentino Ciencias Nat Bernardino Rivadavia, RA-1405 Buenos Aires, DF, Argentina;
2.Univ Cologne, Seminar Geog & Ihre Didakt, D-50931 Cologne, Germany
推荐引用方式
GB/T 7714
Vilanova, Isabel,Schittek, Karsten,Geilenkirchen, Mathias,et al. Last millennial environmental reconstruction based on a multi-proxy record from Laguna Nassau, Western Pampas, Argentina[J],2015,277(2):209-224.
APA Vilanova, Isabel,Schittek, Karsten,Geilenkirchen, Mathias,Schaebitz, Frank,&Schulz, Wilfried.(2015).Last millennial environmental reconstruction based on a multi-proxy record from Laguna Nassau, Western Pampas, Argentina.NEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN,277(2),209-224.
MLA Vilanova, Isabel,et al."Last millennial environmental reconstruction based on a multi-proxy record from Laguna Nassau, Western Pampas, Argentina".NEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN 277.2(2015):209-224.
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