Comparative analysis of soil thermal conductivity in the permafrost regions of the Qinghai–Tibetan Plateau and the Arctic
Rattachement africain : cn. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
The Qinghai-Tibetan Plateau (QTP) and the Arctic are prime examples of permafrost distribution in high-altitude and high-latitude regions. A nuanced understanding of soil thermal conductivity (STC) and the various influencing factors is essential for improving the accuracy of permafrost simulation models in these areas. Nevertheless, no comparative analysis of STC between these two regions has been conducted. Therefore, this study aims to investigate the characteristics and influencing factors of STC at varying depths within the active layer (5 to 60 cm) during freezing and thawing periods in the QTP and the Arctic, using the regional-scale STC data products simulated through the XGBoost method. The findings indicate the following: (1) the mean STC of permafrost in the QTP is higher than that in the Arctic permafrost region. The STC in the QTP demonstrates a declining trend over time, while the Arctic permafrost maintains relative stability. The mean STC values in the QTP permafrost region during the thawing period are significantly higher than those during the freezing period. (2) STC of the QTP exhibits a fluctuating pattern at different depths, in contrast, the average STC value in the Arctic increases steadily with depth, with an increase rate of approximately 0.005 Wm −1 K −1 /cm. (3) The analysis of influencing factors revealed that although moisture content, bulk density, and porosity are the primary drivers of regional variations in STC between the QTP and the Arctic permafrost, moisture elements in the QTP region have a greater influence on STC and the effect is stronger with increasing depth and during the freeze–thaw cycles. Conversely, soil saturation, bulk density, and porosity in the Arctic have significant impacts. This study constitutes the first systematic comparative analysis of STC characteristics.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Comparative analysis of soil thermal conductivity in the permafrost regions of the Qinghai–Tibetan Plateau and the Arctic
- Date Crossref
- 01/08/2025
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
-
Chinese Academy of Sciences pays non établi dans la noticeOrganisme public
-
Northwest Institute of Eco-Environment and Resources pays non établi dans la noticeStructure de recherche
-
University of Chinese Academy of Sciences pays non établi dans la noticeUniversité ou école supérieure
-
Nanyang Normal University pays non établi dans la noticeUniversité ou école supérieure
-
State Key Laboratory of Cryospheric Science and Frozen Soil Engineering Cryosphere Research Station on the Qinghai–Tibet Plateau pays non établi dans la noticeStructure de recherche
-
Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands pays non établi dans la noticeStructure de recherche
-
Key Laboratory of Knowledge Computing and Intelligent Decision pays non établi dans la noticeStructure de recherche
-
School of Geographic Science and Tourism pays non établi dans la noticeUniversité ou école supérieure
Chinese Academy of Sciences, Northwest Institute of Eco-Environment and Resources et University of Chinese Academy of Sciences, avec 5 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.