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Environmental and Climatic History in the NW Argentine Andes (24° S) Over the Last 2100 Years Inferred from a High-altitude Peatland Record : Volume 11, Issue 3 (27/05/2015)

By Schittek, K.

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Book Id: WPLBN0004006802
Format Type: PDF Article :
File Size: Pages 40
Reproduction Date: 2015

Title: Environmental and Climatic History in the NW Argentine Andes (24° S) Over the Last 2100 Years Inferred from a High-altitude Peatland Record : Volume 11, Issue 3 (27/05/2015)  
Author: Schittek, K.
Volume: Vol. 11, Issue 3
Language: English
Subject: Science, Climate, Past
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Lücke, A., Kock, S. T., Schittek, K., Kulemeyer, J. J., Schäbitz, F., Ohlendorf, C., & Lupo, L. C. (2015). Environmental and Climatic History in the NW Argentine Andes (24° S) Over the Last 2100 Years Inferred from a High-altitude Peatland Record : Volume 11, Issue 3 (27/05/2015). Retrieved from http://www.ebooklibrary.org/


Description
Description: Seminar of Geography and Geographical Education, University of Cologne, Germany. High-altitude cushion peatlands are versatile archives for high-resolution palaeoenvironmental studies, due to their high accumulation rates, range of proxies and sensitivity to climatic and/or human-induced changes. Especially within the central Andes, the knowledge about climate conditions during the Holocene is limited. In this study, we present the environmental and climatic history for the last 2100 years of Cerro Tuzgle peatland (CTP), which is located in the dry Puna of NW Argentina, based on a multi-proxy approach. X-ray fluorescence (XRF), stable isotope and element content analyses (δ13C, δ15N, TN and TOC) were conducted to analyse the inorganic geochemistry throughout the sequence, revealing changes in the peatland's past redox conditions. Pollen assemblages give an insight into substantial environmental changes on a regional scale. The palaeoclimate varied significantly during the last 2100 years. The results reflect prominent late Holocene climate anomalies and provide evidence that Northern Hemisphere temperature oscillations were extensive and affected the southward migration of the Intertropical Convergence Zone (ITCZ), and hence, the intensity of moisture flux within the South American Summer Monsoon (SASM) belt. Volcanic forcing at the beginning of the 19th century (1815 Tambora eruption) seems to have had an impact on climatic settings in the central Andes. In the past, the peatland recovered from climatic perturbations. Nowadays, CTP is heavily degraded by human interventions, and the peat deposit becomes increasingly susceptible to erosion and incision.

Summary
Environmental and climatic history in the NW Argentine Andes (24° S) over the last 2100 years inferred from a high-altitude peatland record

Excerpt
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