Ice in caves and its effect on thermal inversion and permafrost in the case of the Velika ledena jama v Paradani, Smrekova draga and neighbouring dolines
In the Velika ledena jama v Paradani, in the karstic blowholes on the slopes of Smrekova draga and in the nearby dolines I measured and interpreted air temperatures and the effect of the summer outflow of cold air from them into the surrounding area. In winter, cold air enters the cave, radically co...
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Slovenian Academy of Sciences and Arts
2021
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Online Access: | https://doi.org/10.3986/ac.v50i2-3.10495 https://doaj.org/article/2e80ce2107484c49b532419f6c5a8575 |
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ftdoajarticles:oai:doaj.org/article:2e80ce2107484c49b532419f6c5a8575 2023-05-15T16:36:59+02:00 Ice in caves and its effect on thermal inversion and permafrost in the case of the Velika ledena jama v Paradani, Smrekova draga and neighbouring dolines Andrej Mihevc 2021-12-01T00:00:00Z https://doi.org/10.3986/ac.v50i2-3.10495 https://doaj.org/article/2e80ce2107484c49b532419f6c5a8575 EN eng Slovenian Academy of Sciences and Arts https://ojs.zrc-sazu.si/carsologica/article/view/10495 https://doaj.org/toc/0583-6050 https://doaj.org/toc/1580-2612 0583-6050 1580-2612 doi:10.3986/ac.v50i2-3.10495 https://doaj.org/article/2e80ce2107484c49b532419f6c5a8575 Acta Carsologica, Vol 50, Iss 2-3 (2021) karst ice cave blowholes doline cave climate topoclimate permafrost thermal inversion Petrology QE420-499 Stratigraphy QE640-699 article 2021 ftdoajarticles https://doi.org/10.3986/ac.v50i2-3.10495 2023-02-12T01:31:03Z In the Velika ledena jama v Paradani, in the karstic blowholes on the slopes of Smrekova draga and in the nearby dolines I measured and interpreted air temperatures and the effect of the summer outflow of cold air from them into the surrounding area. In winter, cold air enters the cave, radically cooling the entrance part of the cave, where for this reason there is permanent cave ice. The summertime circulation is reversed: emerging from the inner part of cave, which has an average temperature of around 4° C, is air which only when it transits through the sub-cooled entrance part is then cooled to around 1° C. This air comes to the surface and in the hollow at the cave entrance maintains a distinct thermal inversion during the warm part of the year. There is a similar air circulation and similar development of annual temperatures observed at the vents, where cave air emerges through rubble spread over cave entrances on slopes or at the bottom of dolines. The stable summer air temperatures of around 1° C in the vents where I conducted measurements indicate that underneath them there is also permafrost or sub-cooled rock and permanent ice. This is created and preserved, just like in the caves, due to the advection of cold air in winter. In Trnovski gozd, such karstic permafrost is found at an altitude of 1,100 m above sea level. The outflow of cold air from the vents in the summer, just like inside the cave, causes a distinct thermal inversion in dolines on the surface. Article in Journal/Newspaper Ice permafrost Directory of Open Access Journals: DOAJ Articles Draga ENVELOPE(7.900,7.900,63.004,63.004) Jama ENVELOPE(68.300,68.300,-73.317,-73.317) Acta Carsologica 50 2-3 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
karst ice cave blowholes doline cave climate topoclimate permafrost thermal inversion Petrology QE420-499 Stratigraphy QE640-699 |
spellingShingle |
karst ice cave blowholes doline cave climate topoclimate permafrost thermal inversion Petrology QE420-499 Stratigraphy QE640-699 Andrej Mihevc Ice in caves and its effect on thermal inversion and permafrost in the case of the Velika ledena jama v Paradani, Smrekova draga and neighbouring dolines |
topic_facet |
karst ice cave blowholes doline cave climate topoclimate permafrost thermal inversion Petrology QE420-499 Stratigraphy QE640-699 |
description |
In the Velika ledena jama v Paradani, in the karstic blowholes on the slopes of Smrekova draga and in the nearby dolines I measured and interpreted air temperatures and the effect of the summer outflow of cold air from them into the surrounding area. In winter, cold air enters the cave, radically cooling the entrance part of the cave, where for this reason there is permanent cave ice. The summertime circulation is reversed: emerging from the inner part of cave, which has an average temperature of around 4° C, is air which only when it transits through the sub-cooled entrance part is then cooled to around 1° C. This air comes to the surface and in the hollow at the cave entrance maintains a distinct thermal inversion during the warm part of the year. There is a similar air circulation and similar development of annual temperatures observed at the vents, where cave air emerges through rubble spread over cave entrances on slopes or at the bottom of dolines. The stable summer air temperatures of around 1° C in the vents where I conducted measurements indicate that underneath them there is also permafrost or sub-cooled rock and permanent ice. This is created and preserved, just like in the caves, due to the advection of cold air in winter. In Trnovski gozd, such karstic permafrost is found at an altitude of 1,100 m above sea level. The outflow of cold air from the vents in the summer, just like inside the cave, causes a distinct thermal inversion in dolines on the surface. |
format |
Article in Journal/Newspaper |
author |
Andrej Mihevc |
author_facet |
Andrej Mihevc |
author_sort |
Andrej Mihevc |
title |
Ice in caves and its effect on thermal inversion and permafrost in the case of the Velika ledena jama v Paradani, Smrekova draga and neighbouring dolines |
title_short |
Ice in caves and its effect on thermal inversion and permafrost in the case of the Velika ledena jama v Paradani, Smrekova draga and neighbouring dolines |
title_full |
Ice in caves and its effect on thermal inversion and permafrost in the case of the Velika ledena jama v Paradani, Smrekova draga and neighbouring dolines |
title_fullStr |
Ice in caves and its effect on thermal inversion and permafrost in the case of the Velika ledena jama v Paradani, Smrekova draga and neighbouring dolines |
title_full_unstemmed |
Ice in caves and its effect on thermal inversion and permafrost in the case of the Velika ledena jama v Paradani, Smrekova draga and neighbouring dolines |
title_sort |
ice in caves and its effect on thermal inversion and permafrost in the case of the velika ledena jama v paradani, smrekova draga and neighbouring dolines |
publisher |
Slovenian Academy of Sciences and Arts |
publishDate |
2021 |
url |
https://doi.org/10.3986/ac.v50i2-3.10495 https://doaj.org/article/2e80ce2107484c49b532419f6c5a8575 |
long_lat |
ENVELOPE(7.900,7.900,63.004,63.004) ENVELOPE(68.300,68.300,-73.317,-73.317) |
geographic |
Draga Jama |
geographic_facet |
Draga Jama |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Acta Carsologica, Vol 50, Iss 2-3 (2021) |
op_relation |
https://ojs.zrc-sazu.si/carsologica/article/view/10495 https://doaj.org/toc/0583-6050 https://doaj.org/toc/1580-2612 0583-6050 1580-2612 doi:10.3986/ac.v50i2-3.10495 https://doaj.org/article/2e80ce2107484c49b532419f6c5a8575 |
op_doi |
https://doi.org/10.3986/ac.v50i2-3.10495 |
container_title |
Acta Carsologica |
container_volume |
50 |
container_issue |
2-3 |
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1766027292186771456 |