Estimation of Permafrost Ground Ice to 10 m Depth on the Qinghai‐Tibet Plateau
ABSTRACT Permafrost ground ice melting could alter hydrological processes in cold regions by releasing water. Currently, there is a lack of gridded data of ground ice from the Qinghai‐Tibet Plateau (QTP). Using 664 borehole sample records, we applied a random forest (RF) method to predict the ground...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | http://dx.doi.org/10.1002/ppp.2226 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2226 |
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crwiley:10.1002/ppp.2226 2024-06-02T08:07:58+00:00 Estimation of Permafrost Ground Ice to 10 m Depth on the Qinghai‐Tibet Plateau Zou, Defu Pang, Qiangqiang Zhao, Lin Wang, Lingxiao Hu, Guojie Du, Erji Liu, Guangyue Liu, Shibo Liu, Yadong National Natural Science Foundation of China 2024 http://dx.doi.org/10.1002/ppp.2226 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2226 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes ISSN 1045-6740 1099-1530 journal-article 2024 crwiley https://doi.org/10.1002/ppp.2226 2024-05-03T11:44:06Z ABSTRACT Permafrost ground ice melting could alter hydrological processes in cold regions by releasing water. Currently, there is a lack of gridded data of ground ice from the Qinghai‐Tibet Plateau (QTP). Using 664 borehole sample records, we applied a random forest (RF) method to predict the ground ice content of permafrost between 2 and 10 m depth in three layers (2–3, 3–5, and 5–10 m) at a spatial resolution of 1 km. The RF predictions demonstrated an R 2 value exceeding 0.80 for all three layers with a negligible positive overestimation (0.98%–1.85%). The ground ice content of the first layer (2–3 m) can be predicted primarily using climate variables, but the contribution of terrain and soil variables increases as the depth increases. The total water storage of ground ice across the QTP permafrost (2–10 m depth) is approximately 3330.0 km 3 , with 403.5 km 3 in the 2–3 m layer, 857.2 km 3 in the 3–5 m layer, and 2069.3 km 3 in the 5–10 m layer. This study generated for the first time a gridded dataset of the shallow permafrost ground ice content across the entire QTP which can be used to improve simulations of hydrological processes in the permafrost regions. Article in Journal/Newspaper Ice permafrost Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT Permafrost ground ice melting could alter hydrological processes in cold regions by releasing water. Currently, there is a lack of gridded data of ground ice from the Qinghai‐Tibet Plateau (QTP). Using 664 borehole sample records, we applied a random forest (RF) method to predict the ground ice content of permafrost between 2 and 10 m depth in three layers (2–3, 3–5, and 5–10 m) at a spatial resolution of 1 km. The RF predictions demonstrated an R 2 value exceeding 0.80 for all three layers with a negligible positive overestimation (0.98%–1.85%). The ground ice content of the first layer (2–3 m) can be predicted primarily using climate variables, but the contribution of terrain and soil variables increases as the depth increases. The total water storage of ground ice across the QTP permafrost (2–10 m depth) is approximately 3330.0 km 3 , with 403.5 km 3 in the 2–3 m layer, 857.2 km 3 in the 3–5 m layer, and 2069.3 km 3 in the 5–10 m layer. This study generated for the first time a gridded dataset of the shallow permafrost ground ice content across the entire QTP which can be used to improve simulations of hydrological processes in the permafrost regions. |
author2 |
National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Zou, Defu Pang, Qiangqiang Zhao, Lin Wang, Lingxiao Hu, Guojie Du, Erji Liu, Guangyue Liu, Shibo Liu, Yadong |
spellingShingle |
Zou, Defu Pang, Qiangqiang Zhao, Lin Wang, Lingxiao Hu, Guojie Du, Erji Liu, Guangyue Liu, Shibo Liu, Yadong Estimation of Permafrost Ground Ice to 10 m Depth on the Qinghai‐Tibet Plateau |
author_facet |
Zou, Defu Pang, Qiangqiang Zhao, Lin Wang, Lingxiao Hu, Guojie Du, Erji Liu, Guangyue Liu, Shibo Liu, Yadong |
author_sort |
Zou, Defu |
title |
Estimation of Permafrost Ground Ice to 10 m Depth on the Qinghai‐Tibet Plateau |
title_short |
Estimation of Permafrost Ground Ice to 10 m Depth on the Qinghai‐Tibet Plateau |
title_full |
Estimation of Permafrost Ground Ice to 10 m Depth on the Qinghai‐Tibet Plateau |
title_fullStr |
Estimation of Permafrost Ground Ice to 10 m Depth on the Qinghai‐Tibet Plateau |
title_full_unstemmed |
Estimation of Permafrost Ground Ice to 10 m Depth on the Qinghai‐Tibet Plateau |
title_sort |
estimation of permafrost ground ice to 10 m depth on the qinghai‐tibet plateau |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/ppp.2226 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2226 |
genre |
Ice permafrost Permafrost and Periglacial Processes |
genre_facet |
Ice permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.2226 |
container_title |
Permafrost and Periglacial Processes |
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1800753115528429568 |