Reconstruction of the Earth’s surface temperature based on data of deep boreholes,global warming in the last millennium,and long-term solar cyclicity. Part 2. Experimental data analysis |
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Authors: | V A Dergachev O M Raspopov |
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Institution: | (1) Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA 90089, USA;; |
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Abstract: | The most reliable pattern of climate changes is obtained using data of instrumental observations at the network of meteorological
stations. However, the series of such data have short timescales (about 150 years). Indirect data from natural archives make
it possible to judge specific features of climate changes in the more distant past. In contrast to indirect methods, when
data are related to temperature through statistical correlations with air temperature, the borehole geothermal method makes
it possible to directly determine the surface air temperature. The reconstructions of the temperature obtained using different
indirect data for the Northern Hemisphere have been compared with the surface air temperature reconstructions based on the
data of borehole thermometry and solar activity variations, and the possibilities of using the method in order to reconstruct
long-term trends in climate changes have been indicated. |
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Keywords: | |
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