Freeze-thaw cycles and snow impact at arid permafrost region in Chajnantor Volcano, Atacama, northern Chile
Permafrost occurs in the high Atacama Desert, and its thermal state was characterized at a study site 5,075 m a.s.l., at the lower regional altitude boundary for permafrost. The permafrost body is about 5 m thick and located in the hydrothermal alteration zone. The freeze-thaw layer and upper part o...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/80637 2023-05-15T14:14:03+02:00 Freeze-thaw cycles and snow impact at arid permafrost region in Chajnantor Volcano, Atacama, northern Chile Mena, Gabriela Yoshikawa, Kenji Schorghofer, Norbert Pasten, Cesar Ochoa, Felipe Agustin Yoshii, Yuzuru Doi, Mamoru Miyata, Takeshi Takahashi, Hidenori Casassa, Gino Sone, Toshio http://hdl.handle.net/2115/80637 https://doi.org/10.1080/15230430.2021.1878739 eng eng Taylor & Francis http://hdl.handle.net/2115/80637 Arctic antarctic and alpine research, 53(1): 60-66 http://dx.doi.org/10.1080/15230430.2021.1878739 https://creativecommons.org/licenses/by/4.0/ CC-BY Permafrost freeze–thaw cycle high elevation Atacama snow 450 article fthokunivhus https://doi.org/10.1080/15230430.2021.1878739 2022-11-18T01:06:22Z Permafrost occurs in the high Atacama Desert, and its thermal state was characterized at a study site 5,075 m a.s.l., at the lower regional altitude boundary for permafrost. The permafrost body is about 5 m thick and located in the hydrothermal alteration zone. The freeze-thaw layer and upper part of the permafrost layer temperatures were measured at 0 to 39 cm depth at 1-cm resolution throughout the year. The upper 3 cm of the ground experienced more than 100 freeze-thaw cycles in 2019. The maximum thaw depth was 14 cm. No significant thermal offset is observed between the annual mean of the surface temperature and the top permafrost boundary. The 14-m borehole reveals that the geothermal gradient was quite high at 200 degrees C/km. In 2019 the seventy days of snow cover impacted the surface energy budget. Winter and summer snow conditions contribute to cooling the surface temperature regime in different ways. Article in Journal/Newspaper Antarctic and Alpine Research Arctic permafrost Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic, Antarctic, and Alpine Research 53 1 60 66 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Permafrost freeze–thaw cycle high elevation Atacama snow 450 |
spellingShingle |
Permafrost freeze–thaw cycle high elevation Atacama snow 450 Mena, Gabriela Yoshikawa, Kenji Schorghofer, Norbert Pasten, Cesar Ochoa, Felipe Agustin Yoshii, Yuzuru Doi, Mamoru Miyata, Takeshi Takahashi, Hidenori Casassa, Gino Sone, Toshio Freeze-thaw cycles and snow impact at arid permafrost region in Chajnantor Volcano, Atacama, northern Chile |
topic_facet |
Permafrost freeze–thaw cycle high elevation Atacama snow 450 |
description |
Permafrost occurs in the high Atacama Desert, and its thermal state was characterized at a study site 5,075 m a.s.l., at the lower regional altitude boundary for permafrost. The permafrost body is about 5 m thick and located in the hydrothermal alteration zone. The freeze-thaw layer and upper part of the permafrost layer temperatures were measured at 0 to 39 cm depth at 1-cm resolution throughout the year. The upper 3 cm of the ground experienced more than 100 freeze-thaw cycles in 2019. The maximum thaw depth was 14 cm. No significant thermal offset is observed between the annual mean of the surface temperature and the top permafrost boundary. The 14-m borehole reveals that the geothermal gradient was quite high at 200 degrees C/km. In 2019 the seventy days of snow cover impacted the surface energy budget. Winter and summer snow conditions contribute to cooling the surface temperature regime in different ways. |
format |
Article in Journal/Newspaper |
author |
Mena, Gabriela Yoshikawa, Kenji Schorghofer, Norbert Pasten, Cesar Ochoa, Felipe Agustin Yoshii, Yuzuru Doi, Mamoru Miyata, Takeshi Takahashi, Hidenori Casassa, Gino Sone, Toshio |
author_facet |
Mena, Gabriela Yoshikawa, Kenji Schorghofer, Norbert Pasten, Cesar Ochoa, Felipe Agustin Yoshii, Yuzuru Doi, Mamoru Miyata, Takeshi Takahashi, Hidenori Casassa, Gino Sone, Toshio |
author_sort |
Mena, Gabriela |
title |
Freeze-thaw cycles and snow impact at arid permafrost region in Chajnantor Volcano, Atacama, northern Chile |
title_short |
Freeze-thaw cycles and snow impact at arid permafrost region in Chajnantor Volcano, Atacama, northern Chile |
title_full |
Freeze-thaw cycles and snow impact at arid permafrost region in Chajnantor Volcano, Atacama, northern Chile |
title_fullStr |
Freeze-thaw cycles and snow impact at arid permafrost region in Chajnantor Volcano, Atacama, northern Chile |
title_full_unstemmed |
Freeze-thaw cycles and snow impact at arid permafrost region in Chajnantor Volcano, Atacama, northern Chile |
title_sort |
freeze-thaw cycles and snow impact at arid permafrost region in chajnantor volcano, atacama, northern chile |
publisher |
Taylor & Francis |
url |
http://hdl.handle.net/2115/80637 https://doi.org/10.1080/15230430.2021.1878739 |
genre |
Antarctic and Alpine Research Arctic permafrost |
genre_facet |
Antarctic and Alpine Research Arctic permafrost |
op_relation |
http://hdl.handle.net/2115/80637 Arctic antarctic and alpine research, 53(1): 60-66 http://dx.doi.org/10.1080/15230430.2021.1878739 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1080/15230430.2021.1878739 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
53 |
container_issue |
1 |
container_start_page |
60 |
op_container_end_page |
66 |
_version_ |
1766286546993938432 |