Spurious additional warming reconstructed from borehole temperatures corrected for the effect of the Last Glacial Cycle

0488793 - GFÚ 2019 RIV US eng J - Journal Article
Šafanda, Jan
Spurious additional warming reconstructed from borehole temperatures corrected for the effect of the Last Glacial Cycle.
Geophysical Research Letters. Roč. 45, č. 6 (2018), s. 2780-2785. ISSN 0094-8276. E-ISSN 1944-8007
Institutional support: RVO:67985530
Keywords : borehole temperatures * ground surface temperature history * effect of the Last Glacial Cycle
OECD category: Volcanology
Impact factor: 4.578, year: 2018

Reconstructions of past ground surface temperature changes from temperature logs conducted in several hundred meter deep boreholes have proved to be a valuable independent source of information on climate variations over the last millennium. The reconstruction techniques have been evolving for more than two decades to extract optimally the climate signal of the last millennium contained in the temperature logs of different length performed in sites with different histories of the Last Glacial Cycle. This paper analyzes the method of the Last Glacial Cycle thermal effect removal from such borehole temperature profiles used by Beltrami et al. (2017, ) in reconstructing the last 500year history. I show that the reported results of additional warming in this period reconstructed from the corrected borehole data for North America are an artifact generated by the correction.
Permanent Link: http://hdl.handle.net/11104/0283330