Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1127/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
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ISSN | 0077-7749 |
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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