Late Pleistocene–Holocene ground surface heat flux changes reconstructed from borehole temperature data (the Urals, Russia)
We use geothermal reconstruction of the ground surface temperature (GST) history early obtained in the Middle Urals to determine the surface heat flux (SHF) history over the past 35 kyr. A new algorithm of GST–SHF transformation was applied to solve this problem. The timescale of geothermal reconstr...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-04-01
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| Series: | Climate of the Past |
| Online Access: | http://www.clim-past.net/11/647/2015/cp-11-647-2015.pdf |
| Summary: | We use geothermal reconstruction of the ground surface temperature (GST)
history early obtained in the Middle Urals to determine the surface heat flux
(SHF) history over the past 35 kyr. A new algorithm of GST–SHF
transformation was applied to solve this problem. The timescale of
geothermal reconstructions has been corrected by comparing the estimated heat
flux and annual insolation at the latitude of 60° N. The consistency
of SHF and insolation changes on the interval 35–6 kyr BP with the linear correlation coefficient <i>R</i> = 0.99 points to
orbital factors as the main cause of climatic changes during the
Pleistocene–Holocene transition. The amplitude of SHF variations is about
1.3% of the insolation change amplitude. The increase of carbon dioxide
concentrations lagged by 2–3 kyr from the SHF increase and occurred
synchronously with GST changes. |
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| ISSN: | 1814-9324 1814-9332 |