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...
Published in: | Frontiers in Ecology and Evolution |
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ftchinacadscimhe:oai:ir.imde.ac.cn:131551/56139 2023-05-15T13:03:10+02:00 Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet Liao, Ying Li, Yiying Fan, Jihui Galoie, Majid Motamedi, Artemis 2021-09-29 http://ir.imde.ac.cn/handle/131551/56139 https://doi.org/10.3389/fevo.2021.750961 英语 eng FRONTIERS MEDIA SA FRONTIERS IN ECOLOGY AND EVOLUTION http://ir.imde.ac.cn/handle/131551/56139 doi:10.3389/fevo.2021.750961 Tibet freezing and thawing indices climate change variation trends permafrost degradation TEMPERATURE LAPSE RATES ACTIVE-LAYER THICKNESS NEAR-SURFACE AIR CLIMATE-CHANGE PERMAFROST PLATEAU REGION CHINA RIVER Environmental Sciences & Ecology Ecology 期刊论文 2021 ftchinacadscimhe https://doi.org/10.3389/fevo.2021.750961 2022-12-19T18:29:32Z 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 degrees 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 x 10(6) km(2) in Tibet. Report Active layer thickness permafrost IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) Frontiers in Ecology and Evolution 9 |
institution |
Open Polar |
collection |
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) |
op_collection_id |
ftchinacadscimhe |
language |
English |
topic |
Tibet freezing and thawing indices climate change variation trends permafrost degradation TEMPERATURE LAPSE RATES ACTIVE-LAYER THICKNESS NEAR-SURFACE AIR CLIMATE-CHANGE PERMAFROST PLATEAU REGION CHINA RIVER Environmental Sciences & Ecology Ecology |
spellingShingle |
Tibet freezing and thawing indices climate change variation trends permafrost degradation TEMPERATURE LAPSE RATES ACTIVE-LAYER THICKNESS NEAR-SURFACE AIR CLIMATE-CHANGE PERMAFROST PLATEAU REGION CHINA RIVER Environmental Sciences & Ecology Ecology Liao, Ying Li, Yiying Fan, Jihui Galoie, Majid Motamedi, Artemis 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 TEMPERATURE LAPSE RATES ACTIVE-LAYER THICKNESS NEAR-SURFACE AIR CLIMATE-CHANGE PERMAFROST PLATEAU REGION CHINA RIVER Environmental Sciences & Ecology Ecology |
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 degrees 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 x 10(6) km(2) in Tibet. |
format |
Report |
author |
Liao, Ying Li, Yiying Fan, Jihui Galoie, Majid Motamedi, Artemis |
author_facet |
Liao, Ying Li, Yiying Fan, Jihui Galoie, Majid Motamedi, Artemis |
author_sort |
Liao, Ying |
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 SA |
publishDate |
2021 |
url |
http://ir.imde.ac.cn/handle/131551/56139 https://doi.org/10.3389/fevo.2021.750961 |
genre |
Active layer thickness permafrost |
genre_facet |
Active layer thickness permafrost |
op_relation |
FRONTIERS IN ECOLOGY AND EVOLUTION http://ir.imde.ac.cn/handle/131551/56139 doi:10.3389/fevo.2021.750961 |
op_doi |
https://doi.org/10.3389/fevo.2021.750961 |
container_title |
Frontiers in Ecology and Evolution |
container_volume |
9 |
_version_ |
1766329864167620608 |