Changes in the Seasonally Frozen Ground Over the Eastern Qinghai-Tibet Plateau in the Past 60 Years
The Qinghai-Tibet Plateau (QTP) has the largest extent of high altitude permafrost at the middle and low latitudes in northern hemisphere and is surrounded by dozens of seasonally frozen ground. Rising air temperatures have resulted in frozen ground degradation over QTP since the last century. Based...
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Online Access: | https://doi.org/10.3389/feart.2020.00270 https://doaj.org/article/f9d4c8c16ed740a1a8c2dcf38ccd1e96 |
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ftdoajarticles:oai:doaj.org/article:f9d4c8c16ed740a1a8c2dcf38ccd1e96 2023-05-15T17:57:53+02:00 Changes in the Seasonally Frozen Ground Over the Eastern Qinghai-Tibet Plateau in the Past 60 Years Chenghai Wang Wen Zhao Yang Cui 2020-07-01T00:00:00Z https://doi.org/10.3389/feart.2020.00270 https://doaj.org/article/f9d4c8c16ed740a1a8c2dcf38ccd1e96 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/feart.2020.00270/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2020.00270 https://doaj.org/article/f9d4c8c16ed740a1a8c2dcf38ccd1e96 Frontiers in Earth Science, Vol 8 (2020) qinghai-tibet plateau seasonally frozen ground maximum depth of frost penetration climate change freezing-thawing process Science Q article 2020 ftdoajarticles https://doi.org/10.3389/feart.2020.00270 2022-12-31T04:00:59Z The Qinghai-Tibet Plateau (QTP) has the largest extent of high altitude permafrost at the middle and low latitudes in northern hemisphere and is surrounded by dozens of seasonally frozen ground. Rising air temperatures have resulted in frozen ground degradation over QTP since the last century. Based on the daily frozen soil depth, annual mean daily minimum air temperatures and annual mean air temperatures obtained from 19 in-situ observations over QTP, the changes in the thickness, temporal and spatial distributions of frozen ground, as well as the associated attributions, are analyzed for the period of 1960–2019. The results show that the maximum depth of frost penetration, the beginning time of soil freezing and the ending time of soil thawing have changed considerably. On average, the maximum depth of frost penetration (MDFP) has reduced by 0.14∼1.71 m at most stations. The annual frozen period has decreased by about 40 days. The changes in seasonal freezing of soils appear to be attributed to the rising of minimum air temperatures in winter, especially at the higher elevations range from 4500 to 5000 m. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles Frontiers in Earth Science 8 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
qinghai-tibet plateau seasonally frozen ground maximum depth of frost penetration climate change freezing-thawing process Science Q |
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qinghai-tibet plateau seasonally frozen ground maximum depth of frost penetration climate change freezing-thawing process Science Q Chenghai Wang Wen Zhao Yang Cui Changes in the Seasonally Frozen Ground Over the Eastern Qinghai-Tibet Plateau in the Past 60 Years |
topic_facet |
qinghai-tibet plateau seasonally frozen ground maximum depth of frost penetration climate change freezing-thawing process Science Q |
description |
The Qinghai-Tibet Plateau (QTP) has the largest extent of high altitude permafrost at the middle and low latitudes in northern hemisphere and is surrounded by dozens of seasonally frozen ground. Rising air temperatures have resulted in frozen ground degradation over QTP since the last century. Based on the daily frozen soil depth, annual mean daily minimum air temperatures and annual mean air temperatures obtained from 19 in-situ observations over QTP, the changes in the thickness, temporal and spatial distributions of frozen ground, as well as the associated attributions, are analyzed for the period of 1960–2019. The results show that the maximum depth of frost penetration, the beginning time of soil freezing and the ending time of soil thawing have changed considerably. On average, the maximum depth of frost penetration (MDFP) has reduced by 0.14∼1.71 m at most stations. The annual frozen period has decreased by about 40 days. The changes in seasonal freezing of soils appear to be attributed to the rising of minimum air temperatures in winter, especially at the higher elevations range from 4500 to 5000 m. |
format |
Article in Journal/Newspaper |
author |
Chenghai Wang Wen Zhao Yang Cui |
author_facet |
Chenghai Wang Wen Zhao Yang Cui |
author_sort |
Chenghai Wang |
title |
Changes in the Seasonally Frozen Ground Over the Eastern Qinghai-Tibet Plateau in the Past 60 Years |
title_short |
Changes in the Seasonally Frozen Ground Over the Eastern Qinghai-Tibet Plateau in the Past 60 Years |
title_full |
Changes in the Seasonally Frozen Ground Over the Eastern Qinghai-Tibet Plateau in the Past 60 Years |
title_fullStr |
Changes in the Seasonally Frozen Ground Over the Eastern Qinghai-Tibet Plateau in the Past 60 Years |
title_full_unstemmed |
Changes in the Seasonally Frozen Ground Over the Eastern Qinghai-Tibet Plateau in the Past 60 Years |
title_sort |
changes in the seasonally frozen ground over the eastern qinghai-tibet plateau in the past 60 years |
publisher |
Frontiers Media S.A. |
publishDate |
2020 |
url |
https://doi.org/10.3389/feart.2020.00270 https://doaj.org/article/f9d4c8c16ed740a1a8c2dcf38ccd1e96 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Frontiers in Earth Science, Vol 8 (2020) |
op_relation |
https://www.frontiersin.org/article/10.3389/feart.2020.00270/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2020.00270 https://doaj.org/article/f9d4c8c16ed740a1a8c2dcf38ccd1e96 |
op_doi |
https://doi.org/10.3389/feart.2020.00270 |
container_title |
Frontiers in Earth Science |
container_volume |
8 |
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1766166391901126656 |