PERICLIMv1.0: a model deriving palaeo-air temperatures from thaw depth in past permafrost regions
Periglacial features, such as various kinds of patterned ground, cryoturbations, frost wedges, solifluction structures, and blockfields, are among the most common relics of cold climate periods, which repetitively occurred throughout the Quaternary. As such, they are widespread archives of past envi...
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ftcopernicus:oai:publications.copernicus.org:gmd82859 2023-05-15T13:03:34+02:00 PERICLIMv1.0: a model deriving palaeo-air temperatures from thaw depth in past permafrost regions Uxa, Tomáš Křížek, Marek Hrbáček, Filip 2021-04-07 application/pdf https://doi.org/10.5194/gmd-14-1865-2021 https://gmd.copernicus.org/articles/14/1865/2021/ eng eng doi:10.5194/gmd-14-1865-2021 https://gmd.copernicus.org/articles/14/1865/2021/ eISSN: 1991-9603 Text 2021 ftcopernicus https://doi.org/10.5194/gmd-14-1865-2021 2021-04-12T16:22:14Z Periglacial features, such as various kinds of patterned ground, cryoturbations, frost wedges, solifluction structures, and blockfields, are among the most common relics of cold climate periods, which repetitively occurred throughout the Quaternary. As such, they are widespread archives of past environmental conditions. Climate controls on the development of most periglacial features, however, remain poorly known, and thus empirical palaeo-climate reconstructions based on them have limited validity. This study presents and evaluates a simple new inverse modelling scheme called PERICLIMv1.0 (PERIglacial CLIMate) that derives palaeo-air temperature characteristics related to the palaeo-active-layer thickness, which can be recognized using many relict periglacial features found in past permafrost regions. The evaluation against modern temperature records showed that the model reproduces air temperature characteristics with average errors ≤1.3 ∘ C . The past mean annual air temperature modelled experimentally for two sites in the Czech Republic hosting relict cryoturbation structures was between <math xmlns="http://www.w3.org/1998/Math/MathML" id="M3" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">7.0</mn><mo>±</mo><mn mathvariant="normal">1.9</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="52pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="a73d94d6529884b0ef9c6e34a21b2cc9"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="gmd-14-1865-2021-ie00001.svg" width="52pt" height="10pt" src="gmd-14-1865-2021-ie00001.png"/></svg:svg> and <math xmlns="http://www.w3.org/1998/Math/MathML" id="M4" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">3.2</mn><mo>±</mo><mn mathvariant="normal">1.5</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="52pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="9a1b78c553d0a66f6e34c85a92749d54"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="gmd-14-1865-2021-ie00002.svg" width="52pt" height="10pt" src="gmd-14-1865-2021-ie00002.png"/></svg:svg> ∘ C , which is well in line with earlier reconstructions utilizing various palaeo-archives. These initial results are promising and suggest that the model could become a useful tool for reconstructing Quaternary palaeo-environments across vast areas of mid-latitudes and low latitudes where relict periglacial assemblages frequently occur, but their full potential remains to be exploited. Text Active layer thickness permafrost wedge* Copernicus Publications: E-Journals Geoscientific Model Development 14 4 1865 1884 |
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ftcopernicus |
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English |
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Periglacial features, such as various kinds of patterned ground, cryoturbations, frost wedges, solifluction structures, and blockfields, are among the most common relics of cold climate periods, which repetitively occurred throughout the Quaternary. As such, they are widespread archives of past environmental conditions. Climate controls on the development of most periglacial features, however, remain poorly known, and thus empirical palaeo-climate reconstructions based on them have limited validity. This study presents and evaluates a simple new inverse modelling scheme called PERICLIMv1.0 (PERIglacial CLIMate) that derives palaeo-air temperature characteristics related to the palaeo-active-layer thickness, which can be recognized using many relict periglacial features found in past permafrost regions. The evaluation against modern temperature records showed that the model reproduces air temperature characteristics with average errors ≤1.3 ∘ C . The past mean annual air temperature modelled experimentally for two sites in the Czech Republic hosting relict cryoturbation structures was between <math xmlns="http://www.w3.org/1998/Math/MathML" id="M3" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">7.0</mn><mo>±</mo><mn mathvariant="normal">1.9</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="52pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="a73d94d6529884b0ef9c6e34a21b2cc9"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="gmd-14-1865-2021-ie00001.svg" width="52pt" height="10pt" src="gmd-14-1865-2021-ie00001.png"/></svg:svg> and <math xmlns="http://www.w3.org/1998/Math/MathML" id="M4" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">3.2</mn><mo>±</mo><mn mathvariant="normal">1.5</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="52pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="9a1b78c553d0a66f6e34c85a92749d54"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="gmd-14-1865-2021-ie00002.svg" width="52pt" height="10pt" src="gmd-14-1865-2021-ie00002.png"/></svg:svg> ∘ C , which is well in line with earlier reconstructions utilizing various palaeo-archives. These initial results are promising and suggest that the model could become a useful tool for reconstructing Quaternary palaeo-environments across vast areas of mid-latitudes and low latitudes where relict periglacial assemblages frequently occur, but their full potential remains to be exploited. |
format |
Text |
author |
Uxa, Tomáš Křížek, Marek Hrbáček, Filip |
spellingShingle |
Uxa, Tomáš Křížek, Marek Hrbáček, Filip PERICLIMv1.0: a model deriving palaeo-air temperatures from thaw depth in past permafrost regions |
author_facet |
Uxa, Tomáš Křížek, Marek Hrbáček, Filip |
author_sort |
Uxa, Tomáš |
title |
PERICLIMv1.0: a model deriving palaeo-air temperatures from thaw depth in past permafrost regions |
title_short |
PERICLIMv1.0: a model deriving palaeo-air temperatures from thaw depth in past permafrost regions |
title_full |
PERICLIMv1.0: a model deriving palaeo-air temperatures from thaw depth in past permafrost regions |
title_fullStr |
PERICLIMv1.0: a model deriving palaeo-air temperatures from thaw depth in past permafrost regions |
title_full_unstemmed |
PERICLIMv1.0: a model deriving palaeo-air temperatures from thaw depth in past permafrost regions |
title_sort |
periclimv1.0: a model deriving palaeo-air temperatures from thaw depth in past permafrost regions |
publishDate |
2021 |
url |
https://doi.org/10.5194/gmd-14-1865-2021 https://gmd.copernicus.org/articles/14/1865/2021/ |
genre |
Active layer thickness permafrost wedge* |
genre_facet |
Active layer thickness permafrost wedge* |
op_source |
eISSN: 1991-9603 |
op_relation |
doi:10.5194/gmd-14-1865-2021 https://gmd.copernicus.org/articles/14/1865/2021/ |
op_doi |
https://doi.org/10.5194/gmd-14-1865-2021 |
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Geoscientific Model Development |
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