Reconstruction of Paleoclimate
Tree-Ring and Ice-Core Record Combination for Paleoclimatic Reconstructions in the Tien Shan, Kamchatka, and Taymir / Franz Josef Land / Severnaya Zemlia
Tech Area / Field
- ENV-MIN/Monitoring and Instrumentation/Environment
8 Project completed
Senior Project Manager
Malakhov Yu I
MIFI, Russia, Moscow
- Institute of Geography, Russia, Moscow
- Bavarian Academy of Sciences / Commission for Glaciology, Germany, Munich\nUniversität Stuttgart / Institut fuer Geographie, Germany, Stuttgart\nHokkaido University / Institute of Low Temperature Science, Japan, Sapporo\nUniversiteit Utrecht / Instituut voor Marien en Atmosferisch Onderzoek Utrecht, The Netherlands, Utrecht
Project summaryThe objective of the project is to combine the ice-core and tree-ring records in Tien Shan, Kamchatka, and Taymir / Franz Josef Land (FJL) / Severnaya Zemlya (SZ) regions in order to produce three regional climatic reconstructions with annual resolution reproducing both short-term and long-term temperature variations.
Both tree-rings and ice-cores records belong to the climatic proxy of the new generation with annual or sub-annual resolution. The main limitation of tree-ring based reconstructions is the deformation of the long-term climatic signal. In contrast the ice-core records may loose the annual accuracy due to the occasional melting and/or wind scouring of fresh snow. Therefore tree-ring could provide the ice-core records with the external annual chronological control, whereas the ice-core data (including measured borehole temperature) would be useful for checking and improving the long-term climatic signal recorded in the tree-ring time series.
To cross-check the chronologies and combine the three sources of paleoclimatic information in the single robust paleoreconstruction we will:
- collect samples and built regional ring width and density chronologies for the Tien Shan mountains and extend the Kamchatka chronologies;
- cross-check the chronology of four ice-cores with the tree-ring series;
- detect and compare the climatic signals embedded in the ice core and tree-ring records, estimate the sensitivity of both records using a uniform statistical approach;
- develop the method for calibration of the tree-ring series (constructed from short samples) using the measured borehole temperatures and melt features;
- combine the records with the same environmental signal together in the regional paleoclimatic reconstructions.
As result we will produce three robust temperature reconstructions for the last three-five centuries with annual resolution. This is important for the long-term forecast of temperature and environmental changes in Russian Arctic and Sub-Arctic as well as in the high mountains of Central Asia. Analysis of climate change in various climatic zones of the Former Soviet Union (FSU) is important from ecological and economic point of view. The results of this study will contribute to the global networks of climatic proxies. A successful strategy for combining tree-ring and ice-core data could be useful for the development of multi-proxy reconstructions for other regions.