| HRBÁČEK, Filip, Daniel NÝVLT, Kamil LÁSKA, Michaela KŇAŽKOVÁ, Barbora KAMPOVÁ, Zbyněk ENGEL, Marc OLIVA and Carsten W MUELLER. Permafrost and active layer research on James Ross Island: An overview. Czech Polar Reports. Brno: Masarykova univerzita, 2019, vol. 9, No 1, p. 20-36. ISSN 1805-0689. Available from: https://dx.doi.org/10.5817/CPR2019-1-3. |
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@article{1544227,
author = {Hrbáček, Filip and Nývlt, Daniel and Láska, Kamil and Kňažková, Michaela and Kampová, Barbora and Engel, Zbyněk and Oliva, Marc and Mueller, Carsten W},
article_location = {Brno},
article_number = {1},
doi = {http://dx.doi.org/10.5817/CPR2019-1-3},
keywords = {active layer; ground thermal regime; climate; snow cover; ground physical properties},
language = {eng},
issn = {1805-0689},
journal = {Czech Polar Reports},
title = {Permafrost and active layer research on James Ross Island: An overview},
url = {https://www.sci.muni.cz/CPR/17cislo/Hrbacek_web.pdf},
volume = {9},
year = {2019}
}
TY - JOUR
ID - 1544227
AU - Hrbáček, Filip - Nývlt, Daniel - Láska, Kamil - Kňažková, Michaela - Kampová, Barbora - Engel, Zbyněk - Oliva, Marc - Mueller, Carsten W
PY - 2019
TI - Permafrost and active layer research on James Ross Island: An overview
JF - Czech Polar Reports
VL - 9
IS - 1
SP - 20-36
EP - 20-36
PB - Masarykova univerzita
SN - 18050689
KW - active layer
KW - ground thermal regime
KW - climate
KW - snow cover
KW - ground physical properties
UR - https://www.sci.muni.cz/CPR/17cislo/Hrbacek_web.pdf
L2 - https://www.sci.muni.cz/CPR/17cislo/Hrbacek_web.pdf
N2 - This study summarizes the current state of the active layer and permafrost research on James Ross Island. The analysis of climate parameters covers the reference period 2011–2017. The mean annual air temperature at the AWS-JGM site was -6.9°C (ranged from -3.9°C to -8.2°C). The mean annual ground temperature at the depth of 5 cm was -5.5°C (ranged from -3.3°C to -6.7°C) and it also reached -5.6°C (ranged from -4.0 to -6.8°C) at the depth of 50 cm. The mean daily ground temperature at the depth of 5 cm correlated moderately up to strongly with the air temperature depending on the season of the year. Analysis of the snow effect on the ground thermal regime confirmed a low insulating effect of snow cover when snow thickness reached up to 50 cm. A thicker snow accumu-lation, reaching at least 70 cm, can develop around the hyaloclastite breccia boulders where a well pronounced insulation effect on the near-surface ground thermal regime was observed. The effect of lithology on the ground physical properties and the active layer thickness was also investigated. Laboratory analysis of ground thermal propertiesshowed variation in thermal conductivity (0.3 to 0.9 Wm-1K-1). The thickest active layer (89 cm) was observed on the Berry Hill slopes site, where the lowest thawing degree days index (321 to 382°C·day) and the highest value of thermal conductivity (0.9 Wm-1K-1) was observed. The clearest influence of lithological conditions on active layer thickness was observed on the CALM-S grid. The site comprises a sandy Holocene marine terrace and muddy sand of the Whisky Bay Formation. Surveying using a manual probe, ground penetrating radar, and an electromagnetic conductivity meter clearly showed the effect of the lithological boundary on local variability of the active layer thickness.
ER -
HRBÁČEK, Filip, Daniel NÝVLT, Kamil LÁSKA, Michaela KŇAŽKOVÁ, Barbora KAMPOVÁ, Zbyněk ENGEL, Marc OLIVA and Carsten W MUELLER. Permafrost and active layer research on James Ross Island: An overview. \textit{Czech Polar Reports}. Brno: Masarykova univerzita, 2019, vol.~9, No~1, p.~20-36. ISSN~1805-0689. Available from: https://dx.doi.org/10.5817/CPR2019-1-3.
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