Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet
Freezing and thawing indices (FI and TI) are commonly used as indicators for climate change assessment and permafrost extent estimation in cold regions. In this study, based on the meteorological daily data (1978–2017) among 34 meteorological stations in Tibet, the temperature in space has been inte...
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ftdoajarticles:oai:doaj.org/article:ed782456b7b54d3983b8b9f614b3ca48 2023-05-15T17:56:42+02:00 Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet Ying Liao Yiying Li Jihui Fan Majid Galoie Artemis Motamedi 2021-09-01T00:00:00Z https://doi.org/10.3389/fevo.2021.750961 https://doaj.org/article/ed782456b7b54d3983b8b9f614b3ca48 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fevo.2021.750961/full https://doaj.org/toc/2296-701X 2296-701X doi:10.3389/fevo.2021.750961 https://doaj.org/article/ed782456b7b54d3983b8b9f614b3ca48 Frontiers in Ecology and Evolution, Vol 9 (2021) Tibet freezing and thawing indices climate change variation trends permafrost degradation Evolution QH359-425 Ecology QH540-549.5 article 2021 ftdoajarticles https://doi.org/10.3389/fevo.2021.750961 2022-12-31T09:54:02Z Freezing and thawing indices (FI and TI) are commonly used as indicators for climate change assessment and permafrost extent estimation in cold regions. In this study, based on the meteorological daily data (1978–2017) among 34 meteorological stations in Tibet, the temperature in space has been interpolated and FI and TI have been calculated. Finally, spatiotemporal variations have been analyzed and the permafrost area has been estimated. The results showed the mean annual of FI and TI in Tibet are 1241.36 and 1290.22°C⋅day, respectively. A significant downward trend in freezing index (FI) and an upward trend in thawing index (TI) have been reported in the time series, in against, analyzing the spatial distribution showed there is an increasing trend from southeast to northwest for FI while TI was decreased gradually in the same region in Tibet. This research indicates that altitude has a significant influence on the change of FI and TI. With the increase of altitude, FI decreased and TI increased more significantly. The permafrost area was estimated at about 0.59 × 106 km2 in Tibet. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles Frontiers in Ecology and Evolution 9 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Tibet freezing and thawing indices climate change variation trends permafrost degradation Evolution QH359-425 Ecology QH540-549.5 |
spellingShingle |
Tibet freezing and thawing indices climate change variation trends permafrost degradation Evolution QH359-425 Ecology QH540-549.5 Ying Liao Yiying Li Jihui Fan Majid Galoie Artemis Motamedi Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet |
topic_facet |
Tibet freezing and thawing indices climate change variation trends permafrost degradation Evolution QH359-425 Ecology QH540-549.5 |
description |
Freezing and thawing indices (FI and TI) are commonly used as indicators for climate change assessment and permafrost extent estimation in cold regions. In this study, based on the meteorological daily data (1978–2017) among 34 meteorological stations in Tibet, the temperature in space has been interpolated and FI and TI have been calculated. Finally, spatiotemporal variations have been analyzed and the permafrost area has been estimated. The results showed the mean annual of FI and TI in Tibet are 1241.36 and 1290.22°C⋅day, respectively. A significant downward trend in freezing index (FI) and an upward trend in thawing index (TI) have been reported in the time series, in against, analyzing the spatial distribution showed there is an increasing trend from southeast to northwest for FI while TI was decreased gradually in the same region in Tibet. This research indicates that altitude has a significant influence on the change of FI and TI. With the increase of altitude, FI decreased and TI increased more significantly. The permafrost area was estimated at about 0.59 × 106 km2 in Tibet. |
format |
Article in Journal/Newspaper |
author |
Ying Liao Yiying Li Jihui Fan Majid Galoie Artemis Motamedi |
author_facet |
Ying Liao Yiying Li Jihui Fan Majid Galoie Artemis Motamedi |
author_sort |
Ying Liao |
title |
Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet |
title_short |
Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet |
title_full |
Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet |
title_fullStr |
Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet |
title_full_unstemmed |
Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet |
title_sort |
spatiotemporal variations of freezing and thawing indices during the past four decades in tibet |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/fevo.2021.750961 https://doaj.org/article/ed782456b7b54d3983b8b9f614b3ca48 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Frontiers in Ecology and Evolution, Vol 9 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fevo.2021.750961/full https://doaj.org/toc/2296-701X 2296-701X doi:10.3389/fevo.2021.750961 https://doaj.org/article/ed782456b7b54d3983b8b9f614b3ca48 |
op_doi |
https://doi.org/10.3389/fevo.2021.750961 |
container_title |
Frontiers in Ecology and Evolution |
container_volume |
9 |
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1766164943238856704 |