Permafrost and seasonal frost thermal dynamics over fifty years on tropical Maunakea volcano, Hawai‘i
ABSTRACTA unique permafrost thermal state was examined at Maunakea, Hawaiʻi. The presence of the permafrost was determined in 1969. Mean annual ground surface temperature (MAGST) is significantly above zero at permafrost sites, between +2°C and +5°C. This indicates that subsurface thermal processes...
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ftdoajarticles:oai:doaj.org/article:80e4523c3bca44408e833acf01841985 2024-09-15T17:34:48+00:00 Permafrost and seasonal frost thermal dynamics over fifty years on tropical Maunakea volcano, Hawai‘i Kenji Yoshikawa Norbert Schorghofer Fritz Klasner 2023-12-01T00:00:00Z https://doi.org/10.1080/15230430.2023.2186485 https://doaj.org/article/80e4523c3bca44408e833acf01841985 EN eng Taylor & Francis Group https://www.tandfonline.com/doi/10.1080/15230430.2023.2186485 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 doi:10.1080/15230430.2023.2186485 1938-4246 1523-0430 https://doaj.org/article/80e4523c3bca44408e833acf01841985 Arctic, Antarctic, and Alpine Research, Vol 55, Iss 1 (2023) Permafrost Hawaiʻi Maunakea thermal offset active layer tropical mountain permafrost Environmental sciences GE1-350 Ecology QH540-549.5 article 2023 ftdoajarticles https://doi.org/10.1080/15230430.2023.2186485 2024-08-05T17:49:40Z ABSTRACTA unique permafrost thermal state was examined at Maunakea, Hawaiʻi. The presence of the permafrost was determined in 1969. Mean annual ground surface temperature (MAGST) is significantly above zero at permafrost sites, between +2°C and +5°C. This indicates that subsurface thermal processes control and preserve the permafrost state (strong thermal resistance). Year-round high-resolution (1-cm intervals) active layer temperature monitoring reveals the thermal dynamics. Unlike permafrost at higher latitudes, the large thermal offset may be caused by nonconductive heat transfer in the active layer. The permafrost survived many decades because of snow cover, the structure of the ground, and hydraulic permeability. However, over the past fifty years the extent of permafrost has declined. Other periglacial geomorphology has been described in permafrost-free areas mainly above 3,500 m.a.s.l., where freeze–thaw action is ubiquitous. The seasonal frost depth is 40 to 60 cm, and seasonal and diurnal creeping has moved stones about 0.45 to 4.3 cm/year over the last fifty-two years. This research clarified the thermal dynamics of the active layer and the presence of the mountain permafrost at unusually low elevations in the tropics. Article in Journal/Newspaper Active layer temperature Antarctic and Alpine Research Arctic permafrost Directory of Open Access Journals: DOAJ Articles Arctic, Antarctic, and Alpine Research 55 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Permafrost Hawaiʻi Maunakea thermal offset active layer tropical mountain permafrost Environmental sciences GE1-350 Ecology QH540-549.5 |
spellingShingle |
Permafrost Hawaiʻi Maunakea thermal offset active layer tropical mountain permafrost Environmental sciences GE1-350 Ecology QH540-549.5 Kenji Yoshikawa Norbert Schorghofer Fritz Klasner Permafrost and seasonal frost thermal dynamics over fifty years on tropical Maunakea volcano, Hawai‘i |
topic_facet |
Permafrost Hawaiʻi Maunakea thermal offset active layer tropical mountain permafrost Environmental sciences GE1-350 Ecology QH540-549.5 |
description |
ABSTRACTA unique permafrost thermal state was examined at Maunakea, Hawaiʻi. The presence of the permafrost was determined in 1969. Mean annual ground surface temperature (MAGST) is significantly above zero at permafrost sites, between +2°C and +5°C. This indicates that subsurface thermal processes control and preserve the permafrost state (strong thermal resistance). Year-round high-resolution (1-cm intervals) active layer temperature monitoring reveals the thermal dynamics. Unlike permafrost at higher latitudes, the large thermal offset may be caused by nonconductive heat transfer in the active layer. The permafrost survived many decades because of snow cover, the structure of the ground, and hydraulic permeability. However, over the past fifty years the extent of permafrost has declined. Other periglacial geomorphology has been described in permafrost-free areas mainly above 3,500 m.a.s.l., where freeze–thaw action is ubiquitous. The seasonal frost depth is 40 to 60 cm, and seasonal and diurnal creeping has moved stones about 0.45 to 4.3 cm/year over the last fifty-two years. This research clarified the thermal dynamics of the active layer and the presence of the mountain permafrost at unusually low elevations in the tropics. |
format |
Article in Journal/Newspaper |
author |
Kenji Yoshikawa Norbert Schorghofer Fritz Klasner |
author_facet |
Kenji Yoshikawa Norbert Schorghofer Fritz Klasner |
author_sort |
Kenji Yoshikawa |
title |
Permafrost and seasonal frost thermal dynamics over fifty years on tropical Maunakea volcano, Hawai‘i |
title_short |
Permafrost and seasonal frost thermal dynamics over fifty years on tropical Maunakea volcano, Hawai‘i |
title_full |
Permafrost and seasonal frost thermal dynamics over fifty years on tropical Maunakea volcano, Hawai‘i |
title_fullStr |
Permafrost and seasonal frost thermal dynamics over fifty years on tropical Maunakea volcano, Hawai‘i |
title_full_unstemmed |
Permafrost and seasonal frost thermal dynamics over fifty years on tropical Maunakea volcano, Hawai‘i |
title_sort |
permafrost and seasonal frost thermal dynamics over fifty years on tropical maunakea volcano, hawai‘i |
publisher |
Taylor & Francis Group |
publishDate |
2023 |
url |
https://doi.org/10.1080/15230430.2023.2186485 https://doaj.org/article/80e4523c3bca44408e833acf01841985 |
genre |
Active layer temperature Antarctic and Alpine Research Arctic permafrost |
genre_facet |
Active layer temperature Antarctic and Alpine Research Arctic permafrost |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 55, Iss 1 (2023) |
op_relation |
https://www.tandfonline.com/doi/10.1080/15230430.2023.2186485 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 doi:10.1080/15230430.2023.2186485 1938-4246 1523-0430 https://doaj.org/article/80e4523c3bca44408e833acf01841985 |
op_doi |
https://doi.org/10.1080/15230430.2023.2186485 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
55 |
container_issue |
1 |
_version_ |
1810295086421901312 |