Increased mean annual temperatures in 2014–2019 indicate permafrost thaw in Alaskan national parks

Rising temperatures in the Arctic can result in thaw of permafrost, with widespread implications for ecosystems and infrastructure. We analyzed mean annual air and ground temperatures in the eight northernmost national parks in Alaska using data from thirty-three National Park Service climate monito...

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Autores principales:	David K. Swanson, Pamela J. Sousanes, Ken Hill
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	permafrost climate change temperature n-factors Environmental sciences GE1-350 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/d62c969ace3544b28bccf936794a59bc
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spelling	oai:doaj.org-article:d62c969ace3544b28bccf936794a59bc2021-11-04T15:00:42ZIncreased mean annual temperatures in 2014–2019 indicate permafrost thaw in Alaskan national parks1523-04301938-424610.1080/15230430.2020.1859435https://doaj.org/article/d62c969ace3544b28bccf936794a59bc2021-01-01T00:00:00Zhttp://dx.doi.org/10.1080/15230430.2020.1859435https://doaj.org/toc/1523-0430https://doaj.org/toc/1938-4246Rising temperatures in the Arctic can result in thaw of permafrost, with widespread implications for ecosystems and infrastructure. We analyzed mean annual air and ground temperatures in the eight northernmost national parks in Alaska using data from thirty-three National Park Service climate monitoring stations and eight National Weather Service stations. Mean annual air temperatures (MAATs) from 2014 to 2019 increased in a stepwise fashion relative to the preceding thirty-year period by at least 1°C at all locations in the study area; the increase was near 2°C in Denali National Park and most of the Arctic Alaska parks and 3°C in the far western coastal areas of the Arctic parks. The increase in mean annual ground temperatures (MAGT) was approximately equal to the increase in MAAT in windswept tundra areas with minimal snow, whereas under deeper taiga and alpine snowpacks the increase in MAGT was about half as large as the increase in MAAT. If the warm temperatures observed during 2014 to 2019 persist, there will be widespread degradation of permafrost in portions of these national parks and in similar environments across Alaska.David K. SwansonPamela J. SousanesKen HillTaylor & Francis Grouparticlepermafrostclimate changetemperaturen-factorsEnvironmental sciencesGE1-350EcologyQH540-549.5ENArctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 1-19 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	permafrost climate change temperature n-factors Environmental sciences GE1-350 Ecology QH540-549.5
spellingShingle	permafrost climate change temperature n-factors Environmental sciences GE1-350 Ecology QH540-549.5 David K. Swanson Pamela J. Sousanes Ken Hill Increased mean annual temperatures in 2014–2019 indicate permafrost thaw in Alaskan national parks
description	Rising temperatures in the Arctic can result in thaw of permafrost, with widespread implications for ecosystems and infrastructure. We analyzed mean annual air and ground temperatures in the eight northernmost national parks in Alaska using data from thirty-three National Park Service climate monitoring stations and eight National Weather Service stations. Mean annual air temperatures (MAATs) from 2014 to 2019 increased in a stepwise fashion relative to the preceding thirty-year period by at least 1°C at all locations in the study area; the increase was near 2°C in Denali National Park and most of the Arctic Alaska parks and 3°C in the far western coastal areas of the Arctic parks. The increase in mean annual ground temperatures (MAGT) was approximately equal to the increase in MAAT in windswept tundra areas with minimal snow, whereas under deeper taiga and alpine snowpacks the increase in MAGT was about half as large as the increase in MAAT. If the warm temperatures observed during 2014 to 2019 persist, there will be widespread degradation of permafrost in portions of these national parks and in similar environments across Alaska.
format	article
author	David K. Swanson Pamela J. Sousanes Ken Hill
author_facet	David K. Swanson Pamela J. Sousanes Ken Hill
author_sort	David K. Swanson
title	Increased mean annual temperatures in 2014–2019 indicate permafrost thaw in Alaskan national parks
title_short	Increased mean annual temperatures in 2014–2019 indicate permafrost thaw in Alaskan national parks
title_full	Increased mean annual temperatures in 2014–2019 indicate permafrost thaw in Alaskan national parks
title_fullStr	Increased mean annual temperatures in 2014–2019 indicate permafrost thaw in Alaskan national parks
title_full_unstemmed	Increased mean annual temperatures in 2014–2019 indicate permafrost thaw in Alaskan national parks
title_sort	increased mean annual temperatures in 2014–2019 indicate permafrost thaw in alaskan national parks
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/d62c969ace3544b28bccf936794a59bc
work_keys_str_mv	AT davidkswanson increasedmeanannualtemperaturesin20142019indicatepermafrostthawinalaskannationalparks AT pamelajsousanes increasedmeanannualtemperaturesin20142019indicatepermafrostthawinalaskannationalparks AT kenhill increasedmeanannualtemperaturesin20142019indicatepermafrostthawinalaskannationalparks
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Increased mean annual temperatures in 2014–2019 indicate permafrost thaw in Alaskan national parks

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