Snow cover influences the thermal regime of active layer in Urumqi River Source, Tianshan Mountains, China
Snow cover is characterized by the high albedo, low thermal conductivity, and notable heat transition during phase changes. Thus, snow cover significantly affects the ground thermal regime. A comparison of the snow cover in high latitudes or high-altitude snowy mountain regions indicates that the ea...
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ftchinacadscimhe:oai:ir.imde.ac.cn:131551/46362 2023-05-15T17:57:15+02:00 Snow cover influences the thermal regime of active layer in Urumqi River Source, Tianshan Mountains, China Zhao, Jing-yi Chen, Ji Wu, Qing-bai Hou, Xin http://ir.imde.ac.cn/handle/131551/46362 https://doi.org/10.1007/s11629-018-4856-y 英语 eng JOURNAL OF MOUNTAIN SCIENCE http://ir.imde.ac.cn/handle/131551/46362 doi:10.1007/s11629-018-4856-y cn.org.cspace.api.content.CopyrightPolicy@ddd5613 Snow cover Permafrost Ground temperature Tianshan Mountains Heat flux Article 期刊论文 ftchinacadscimhe https://doi.org/10.1007/s11629-018-4856-y 2022-12-19T18:26:25Z Snow cover is characterized by the high albedo, low thermal conductivity, and notable heat transition during phase changes. Thus, snow cover significantly affects the ground thermal regime. A comparison of the snow cover in high latitudes or high-altitude snowy mountain regions indicates that the eastern Tianshan Mountains (China) show a characteristically thin snow cover (snow depth below 15 cm) with remarkable temporal variability. Based on snow depth, heat flux, and ground temperature from 2014 to 2015 in the Urumqi River source, the spatialtemporal characteristics of snow cover and snow cover influences on the thermal conditions of active layer in the permafrost area were analyzed. During the autumn (Sept. - Oct.), thin and discontinuous snow cover can noticeably accelerate the exothermic process of the ground, producing a cooling effect on the shallow soil. During the winter (Nov. - Mar.), it is inferred that the effective thermal insulation starts with snow depth exceeding 10 cm during early winter. However, the snow depth in this area is generally below 15 cm, and the resulting snow-induced thermal insulation during the winter is very limited. Due to common heavy snowfalls in the spring (Apr. to May), the monthly mean snow thickness in April reached to 15 cm and remained until mid-May. Snow cover during the spring significantly retarded the ground warming. Broadly, snow cover in the study area exerts a cooling effect on the active layer and plays a positive role in the development and preservation of permafrost. Article in Journal/Newspaper permafrost IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) Snowy Mountain ENVELOPE(-131.620,-131.620,56.666,56.666) Journal of Mountain Science 15 12 2622 2636 |
institution |
Open Polar |
collection |
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) |
op_collection_id |
ftchinacadscimhe |
language |
English |
topic |
Snow cover Permafrost Ground temperature Tianshan Mountains Heat flux |
spellingShingle |
Snow cover Permafrost Ground temperature Tianshan Mountains Heat flux Zhao, Jing-yi Chen, Ji Wu, Qing-bai Hou, Xin Snow cover influences the thermal regime of active layer in Urumqi River Source, Tianshan Mountains, China |
topic_facet |
Snow cover Permafrost Ground temperature Tianshan Mountains Heat flux |
description |
Snow cover is characterized by the high albedo, low thermal conductivity, and notable heat transition during phase changes. Thus, snow cover significantly affects the ground thermal regime. A comparison of the snow cover in high latitudes or high-altitude snowy mountain regions indicates that the eastern Tianshan Mountains (China) show a characteristically thin snow cover (snow depth below 15 cm) with remarkable temporal variability. Based on snow depth, heat flux, and ground temperature from 2014 to 2015 in the Urumqi River source, the spatialtemporal characteristics of snow cover and snow cover influences on the thermal conditions of active layer in the permafrost area were analyzed. During the autumn (Sept. - Oct.), thin and discontinuous snow cover can noticeably accelerate the exothermic process of the ground, producing a cooling effect on the shallow soil. During the winter (Nov. - Mar.), it is inferred that the effective thermal insulation starts with snow depth exceeding 10 cm during early winter. However, the snow depth in this area is generally below 15 cm, and the resulting snow-induced thermal insulation during the winter is very limited. Due to common heavy snowfalls in the spring (Apr. to May), the monthly mean snow thickness in April reached to 15 cm and remained until mid-May. Snow cover during the spring significantly retarded the ground warming. Broadly, snow cover in the study area exerts a cooling effect on the active layer and plays a positive role in the development and preservation of permafrost. |
format |
Article in Journal/Newspaper |
author |
Zhao, Jing-yi Chen, Ji Wu, Qing-bai Hou, Xin |
author_facet |
Zhao, Jing-yi Chen, Ji Wu, Qing-bai Hou, Xin |
author_sort |
Zhao, Jing-yi |
title |
Snow cover influences the thermal regime of active layer in Urumqi River Source, Tianshan Mountains, China |
title_short |
Snow cover influences the thermal regime of active layer in Urumqi River Source, Tianshan Mountains, China |
title_full |
Snow cover influences the thermal regime of active layer in Urumqi River Source, Tianshan Mountains, China |
title_fullStr |
Snow cover influences the thermal regime of active layer in Urumqi River Source, Tianshan Mountains, China |
title_full_unstemmed |
Snow cover influences the thermal regime of active layer in Urumqi River Source, Tianshan Mountains, China |
title_sort |
snow cover influences the thermal regime of active layer in urumqi river source, tianshan mountains, china |
url |
http://ir.imde.ac.cn/handle/131551/46362 https://doi.org/10.1007/s11629-018-4856-y |
long_lat |
ENVELOPE(-131.620,-131.620,56.666,56.666) |
geographic |
Snowy Mountain |
geographic_facet |
Snowy Mountain |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
JOURNAL OF MOUNTAIN SCIENCE http://ir.imde.ac.cn/handle/131551/46362 doi:10.1007/s11629-018-4856-y |
op_rights |
cn.org.cspace.api.content.CopyrightPolicy@ddd5613 |
op_doi |
https://doi.org/10.1007/s11629-018-4856-y |
container_title |
Journal of Mountain Science |
container_volume |
15 |
container_issue |
12 |
container_start_page |
2622 |
op_container_end_page |
2636 |
_version_ |
1766165641054650368 |