Spatiotemporal <scp>freeze–thaw</scp> variations over the <scp>Qinghai‐Tibet</scp> Plateau 1981–2017 from reanalysis
Abstract The thawing and freezing conditions on the Qinghai‐Tibet Plateau (QTP) are considered effective indicators that are widely used in ecology, climate change, cold‐region engineering design, and permafrost mapping. The purpose of this study is to utilize reanalysis to detect spatial variations...
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crwiley:10.1002/joc.6849 2024-04-28T08:35:47+00:00 Spatiotemporal <scp>freeze–thaw</scp> variations over the <scp>Qinghai‐Tibet</scp> Plateau 1981–2017 from reanalysis Qin, Yanhui Wu, Tonghua Zhang, Peng Liu, Wenfeng Xue, Shanbin Guo, Zonghe National Natural Science Foundation of China 2020 http://dx.doi.org/10.1002/joc.6849 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6849 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.6849 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6849 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 41, issue 2, page 1438-1454 ISSN 0899-8418 1097-0088 Atmospheric Science journal-article 2020 crwiley https://doi.org/10.1002/joc.6849 2024-04-08T06:55:43Z Abstract The thawing and freezing conditions on the Qinghai‐Tibet Plateau (QTP) are considered effective indicators that are widely used in ecology, climate change, cold‐region engineering design, and permafrost mapping. The purpose of this study is to utilize reanalysis to detect spatial variations in freeze–thaw conditions across the QTP from 1981–2017. From a comparison of five recent reanalysis models (MERRA2: National Aeronautics and Space Administration Modern‐Era Reanalysis for Research and Applications, Version 2; ERA: European Center for Medium‐Range Weather Forecasts Interim Reanalysis; GLDAS: Global Land Data Assimilation System NOAH; CFS: National Centers for Environmental Prediction Climate Forecast System Reanalysis, Version 2; and CMFD: China Meteorological Forcing Dataset) against existing sparse observations of 2‐m surface air temperature (SAT), we find that NASA MERRA2 dataset is the most applicable to the QTP. Then, the MERRA2 SAT dataset was selected for this study and was corrected and validated by utilizing calibration models built from the observed data. The results revealed that the correlation coefficients between the corrected MERRA2 SAT and meteorological station observed data increased from 0.52 to 0.93, 0.49 to 0.90, 0.56 to 0.93, and 0.69 to 0.93 in spring, summer, autumn, and winter, respectively. The corrected parameters performed better in the southern and southeastern portions of the QTP. Finally, we utilize the corrected MERRA2 dataset to develop freeze–thaw indices and evaluate statistical trends. We find that relatively high air freezing indices are one of the important factors for the presence of permafrost in the central and northeastern portions of the QTP. Trends in the air thawing and freezing indices in the permafrost and seasonally frozen ground regions indicate that, from 1981 to 2017 in the permafrost regions, the warming was more significant in the summer than in the other seasons. However, the winter warming rates in permafrost and seasonally frozen ground regions ... Article in Journal/Newspaper permafrost Wiley Online Library International Journal of Climatology 41 2 1438 1454 |
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Wiley Online Library |
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language |
English |
topic |
Atmospheric Science |
spellingShingle |
Atmospheric Science Qin, Yanhui Wu, Tonghua Zhang, Peng Liu, Wenfeng Xue, Shanbin Guo, Zonghe Spatiotemporal <scp>freeze–thaw</scp> variations over the <scp>Qinghai‐Tibet</scp> Plateau 1981–2017 from reanalysis |
topic_facet |
Atmospheric Science |
description |
Abstract The thawing and freezing conditions on the Qinghai‐Tibet Plateau (QTP) are considered effective indicators that are widely used in ecology, climate change, cold‐region engineering design, and permafrost mapping. The purpose of this study is to utilize reanalysis to detect spatial variations in freeze–thaw conditions across the QTP from 1981–2017. From a comparison of five recent reanalysis models (MERRA2: National Aeronautics and Space Administration Modern‐Era Reanalysis for Research and Applications, Version 2; ERA: European Center for Medium‐Range Weather Forecasts Interim Reanalysis; GLDAS: Global Land Data Assimilation System NOAH; CFS: National Centers for Environmental Prediction Climate Forecast System Reanalysis, Version 2; and CMFD: China Meteorological Forcing Dataset) against existing sparse observations of 2‐m surface air temperature (SAT), we find that NASA MERRA2 dataset is the most applicable to the QTP. Then, the MERRA2 SAT dataset was selected for this study and was corrected and validated by utilizing calibration models built from the observed data. The results revealed that the correlation coefficients between the corrected MERRA2 SAT and meteorological station observed data increased from 0.52 to 0.93, 0.49 to 0.90, 0.56 to 0.93, and 0.69 to 0.93 in spring, summer, autumn, and winter, respectively. The corrected parameters performed better in the southern and southeastern portions of the QTP. Finally, we utilize the corrected MERRA2 dataset to develop freeze–thaw indices and evaluate statistical trends. We find that relatively high air freezing indices are one of the important factors for the presence of permafrost in the central and northeastern portions of the QTP. Trends in the air thawing and freezing indices in the permafrost and seasonally frozen ground regions indicate that, from 1981 to 2017 in the permafrost regions, the warming was more significant in the summer than in the other seasons. However, the winter warming rates in permafrost and seasonally frozen ground regions ... |
author2 |
National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Qin, Yanhui Wu, Tonghua Zhang, Peng Liu, Wenfeng Xue, Shanbin Guo, Zonghe |
author_facet |
Qin, Yanhui Wu, Tonghua Zhang, Peng Liu, Wenfeng Xue, Shanbin Guo, Zonghe |
author_sort |
Qin, Yanhui |
title |
Spatiotemporal <scp>freeze–thaw</scp> variations over the <scp>Qinghai‐Tibet</scp> Plateau 1981–2017 from reanalysis |
title_short |
Spatiotemporal <scp>freeze–thaw</scp> variations over the <scp>Qinghai‐Tibet</scp> Plateau 1981–2017 from reanalysis |
title_full |
Spatiotemporal <scp>freeze–thaw</scp> variations over the <scp>Qinghai‐Tibet</scp> Plateau 1981–2017 from reanalysis |
title_fullStr |
Spatiotemporal <scp>freeze–thaw</scp> variations over the <scp>Qinghai‐Tibet</scp> Plateau 1981–2017 from reanalysis |
title_full_unstemmed |
Spatiotemporal <scp>freeze–thaw</scp> variations over the <scp>Qinghai‐Tibet</scp> Plateau 1981–2017 from reanalysis |
title_sort |
spatiotemporal <scp>freeze–thaw</scp> variations over the <scp>qinghai‐tibet</scp> plateau 1981–2017 from reanalysis |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/joc.6849 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6849 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.6849 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6849 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
International Journal of Climatology volume 41, issue 2, page 1438-1454 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.6849 |
container_title |
International Journal of Climatology |
container_volume |
41 |
container_issue |
2 |
container_start_page |
1438 |
op_container_end_page |
1454 |
_version_ |
1797567786427351040 |