Shortened duration and reduced area of frozen soil in the Northern Hemisphere
The changes in near-surface soil freeze-thaw cycles (FTCs) are crucial to understanding the related hydrological and biological processes in terrestrial ecosystems under a changing climate. However, long-term dynamics of soil FTCs at the hemisphere scale and the underlying mechanisms are not well un...
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ftpubmed:oai:pubmedcentral.nih.gov:8454614 2023-05-15T15:09:38+02:00 Shortened duration and reduced area of frozen soil in the Northern Hemisphere Li, Ting Chen, Yong-Zhe Han, Li-Jian Cheng, Lin-Hai Lv, Yi-He Fu, Bo-Jie Feng, Xiao-Ming Wu, Xing 2021-07-21 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8454614/ https://doi.org/10.1016/j.xinn.2021.100146 en eng Elsevier http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8454614/ http://dx.doi.org/10.1016/j.xinn.2021.100146 © 2021 The Authors https://creativecommons.org/licenses/by/4.0/This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). CC-BY Innovation (N Y) Report Text 2021 ftpubmed https://doi.org/10.1016/j.xinn.2021.100146 2021-09-26T00:39:23Z The changes in near-surface soil freeze-thaw cycles (FTCs) are crucial to understanding the related hydrological and biological processes in terrestrial ecosystems under a changing climate. However, long-term dynamics of soil FTCs at the hemisphere scale and the underlying mechanisms are not well understood. In this study, the spatiotemporal patterns and main driving factors of soil FTCs across the Northern Hemisphere (NH) during 1979–2017 were analyzed using multisource data fusion and attribution approaches. Our results showed that the duration and the annual mean area of frozen soil in the NH decreased significantly at rates of 0.13 ± 0.04 days/year and 4.9 × 10(4) km(2)/year, respectively, over the past 40 years. These were mainly because the date of frozen soil onset was significantly delayed by 0.1 ± 0.02 days/year, while the end of freezing and onset of thawing were substantially advanced by 0.21 ± 0.02 and 0.15 ± 0.03 days/year, respectively. Moreover, the interannual FTC changes were more drastic in Eurasia than in North America, especially at mid-latitudes (30°–45° N) and in Arctic regions (>75° N). More importantly, our results highlighted that near-surface air temperature (T(a)) and snowpack are the main driving factors of the spatiotemporal variations in soil FTCs. Furthermore, our results suggested that the long-term dynamics of soil FTCs at the hemisphere scale should be considered in terrestrial biosphere models to reduce uncertainties in future simulations. Text Arctic PubMed Central (PMC) Arctic The Innovation 2 3 100146 |
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Report Li, Ting Chen, Yong-Zhe Han, Li-Jian Cheng, Lin-Hai Lv, Yi-He Fu, Bo-Jie Feng, Xiao-Ming Wu, Xing Shortened duration and reduced area of frozen soil in the Northern Hemisphere |
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Report |
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The changes in near-surface soil freeze-thaw cycles (FTCs) are crucial to understanding the related hydrological and biological processes in terrestrial ecosystems under a changing climate. However, long-term dynamics of soil FTCs at the hemisphere scale and the underlying mechanisms are not well understood. In this study, the spatiotemporal patterns and main driving factors of soil FTCs across the Northern Hemisphere (NH) during 1979–2017 were analyzed using multisource data fusion and attribution approaches. Our results showed that the duration and the annual mean area of frozen soil in the NH decreased significantly at rates of 0.13 ± 0.04 days/year and 4.9 × 10(4) km(2)/year, respectively, over the past 40 years. These were mainly because the date of frozen soil onset was significantly delayed by 0.1 ± 0.02 days/year, while the end of freezing and onset of thawing were substantially advanced by 0.21 ± 0.02 and 0.15 ± 0.03 days/year, respectively. Moreover, the interannual FTC changes were more drastic in Eurasia than in North America, especially at mid-latitudes (30°–45° N) and in Arctic regions (>75° N). More importantly, our results highlighted that near-surface air temperature (T(a)) and snowpack are the main driving factors of the spatiotemporal variations in soil FTCs. Furthermore, our results suggested that the long-term dynamics of soil FTCs at the hemisphere scale should be considered in terrestrial biosphere models to reduce uncertainties in future simulations. |
format |
Text |
author |
Li, Ting Chen, Yong-Zhe Han, Li-Jian Cheng, Lin-Hai Lv, Yi-He Fu, Bo-Jie Feng, Xiao-Ming Wu, Xing |
author_facet |
Li, Ting Chen, Yong-Zhe Han, Li-Jian Cheng, Lin-Hai Lv, Yi-He Fu, Bo-Jie Feng, Xiao-Ming Wu, Xing |
author_sort |
Li, Ting |
title |
Shortened duration and reduced area of frozen soil in the Northern Hemisphere |
title_short |
Shortened duration and reduced area of frozen soil in the Northern Hemisphere |
title_full |
Shortened duration and reduced area of frozen soil in the Northern Hemisphere |
title_fullStr |
Shortened duration and reduced area of frozen soil in the Northern Hemisphere |
title_full_unstemmed |
Shortened duration and reduced area of frozen soil in the Northern Hemisphere |
title_sort |
shortened duration and reduced area of frozen soil in the northern hemisphere |
publisher |
Elsevier |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8454614/ https://doi.org/10.1016/j.xinn.2021.100146 |
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Arctic |
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Arctic |
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Arctic |
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Arctic |
op_source |
Innovation (N Y) |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8454614/ http://dx.doi.org/10.1016/j.xinn.2021.100146 |
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© 2021 The Authors https://creativecommons.org/licenses/by/4.0/This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
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CC-BY |
op_doi |
https://doi.org/10.1016/j.xinn.2021.100146 |
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