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HIGH-RESOLUTION RECONSTRUCTION OF CLIMATE CHANGE IN CENTRAL ASIA OVER THE PAST MILLENNIUM

A. Darin, I. Kalugin, N. Maksimova, D. Ovchinnikov, E. Vologina, N. Rudaya, AL. Ptitsyn, SV. Reshetova, Y. Rakshun, K. Zolotarev

First published: 2010DOI pendingView metrics

Abstract

Reconstruction of climate change in Central Asia over the last millennium with an annual resolution was made using geochemical and biological proxy in lake bottom sediments and tree-ring data. We investigated the lake in Central Asia- Teletskoe (Altai), Kucherla (Altai), Baikal, Arahlei (Chita) - and adjacent areas. Cores of bottom sediments were investigated by method of scanning X-ray fluorescent analysis with synchrotron radiation with the spatial resolution of 0.1 mm. It corresponds to the time resolution 0.2-0.5 year. At each point analyzed more than 30 trace elements from K to U. Geochemical proxy of terrigenous, organogenous and aerosol components of sediments well correlated with regional meteodata for the last 100-150 years. Time series of lithological-geochemical indicators of climate change based on dating by 14C, 137Cs and 210Pb was calibrated by instrumental hydrometeorological data. We used tree-ring series together with element contents as an additional proxy for calculation of transfer function, considering that tree-ring series are response to summer temperature in this climatic zone. Annual temperature and precipitation change for the Central Asia region (0 - 1000 years ago) have been reconstructed using the transfer functions such as: time series proxy=function (temperature, precipitation).

Publication details

Title
HIGH-RESOLUTION RECONSTRUCTION OF CLIMATE CHANGE IN CENTRAL ASIA OVER THE PAST MILLENNIUM
Authors
A. Darin, I. Kalugin, N. Maksimova, D. Ovchinnikov, E. Vologina, N. Rudaya, AL. Ptitsyn, SV. Reshetova, Y. Rakshun, K. Zolotarev
Proceedings
10th International Multidisciplinary Scientific GeoConference SGEM2010
Publisher
SGEM Scientific GeoConference
Year
2010
Pages
55-60
SWS Citekey
Darin2010448
ISSN
1314-2704
ISBN
954-91818-1-2
Language
en
Publication type
Conference Paper
Keywords
SRXRF scanninggeochemical indicatorssedimentationtree-ring width chronology
References3

  1. K. Zolotarev et all. Scanning SR-XRF beamline for analysis of bottom sediments // Nucl. Instrum. and Meth. in Physics Research, A470 (2001), 1-2 , pp.376-379.;

  2. A. Daryin et all. Use of a scanning XRF analysis on SR beams from VEPP-3 storage ...// Nucl. Instrum. and Methods in Physics Research, A 543 (2005), pp. 255-258.;

  3. IPCC 2007. Climate Change 2007. The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change , Ed. by S. Solomon, D. Qin, M. Manning, et al. (Cambridge Univ. Press, Cambridge, 2007), p. 996.

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