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Soil temperature dynamics and freezing processes for biocrustal soils in frozen soil regions on the Qinghai-Tibet Plateau

文献类型：期刊论文

作者Ming, Jiao2,4; Zhao, Yunge2,3; Wu, Qingbai1; He, Hailong5; Gao, Liqian2,3
刊名GEODERMA
出版日期2022-03-01
卷号409页码:11
ISSN号0016-7061
关键词Biocrusts Temperature regime Freezing and thawing processes Permafrost Active layer
DOI10.1016/j.geoderma.2021.115655
通讯作者Zhao, Yunge()
英文摘要The relationship between soil temperature and its variations with different types of land cover are critical to understanding the effects of climate warming on ecohydrological processes in frozen soil regions such as the Qinghai-Tibet Plateau (QTP) of China. Biological soil crusts (biocrusts), which cover approximately 40% of the open soil surface in frozen soil regions, exert great impacts on soil temperatures. However, little attention has been given to the potential effects of biocrusts on the temperature characteristics, dynamics and freezing duration of soil in frozen soil regions. To provide more insight into this issue, an automatic system was used to monitor soil temperatures and dynamics at depths of 5, 30, 50 and 100 cm beneath bare soil and two types of biocrustal soils (soils covered with two types of biocrusts) on the QTP of China. The results showed that biocrusts play an important role in controlling the dynamics of soil temperatures. Biocrusts cause a 0.6-1 degrees C decrease in the mean annual temperature of soils down to a depth of 100 cm. The extent of the decrease in soil temperature was dependent on biocrust type, and dark biocrust showed a greater reduction in soil temperature than light biocrust. In addition, reductions in soil temperatures of biocrusts mainly occurred in daytimes of the thawing period, and this prolonged the freezing duration in the top 100 cm by approximately 10-20 days. The results of this study indicate that biocrusts maintain lower temperatures in the thawing period and slow the thawing of frozen soil in the spring, which helps to maintain the stability of the frozen soil. This information may aid understanding of the function of biocrusts in the frozen soil regions under global warming conditions.
WOS关键词LAYER THERMAL REGIME ; ACTIVE-LAYER ; VEGETATION COVER ; SAND DUNES ; PERMAFROST ; CRUSTS ; DEGRADATION ; MOISTURE ; CLIMATE ; SUMMER
资助项目National Natural Science Foundation of China[41601072] ; National Natural Science Foundation of China[41830758] ; Research Program of the State Key Laboratory of Frozen Soil Engineering, Chinese Academy of Sci-ences[Y452F11001]
WOS研究方向Agriculture
语种英语
出版者ELSEVIER
WOS记录号WOS:000788135400001
资助机构National Natural Science Foundation of China ; Research Program of the State Key Laboratory of Frozen Soil Engineering, Chinese Academy of Sci-ences
源URL[http://ir.igsnrr.ac.cn/handle/311030/175683]  
专题中国科学院地理科学与资源研究所
通讯作者Zhao, Yunge
作者单位1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
3.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Ming, Jiao,Zhao, Yunge,Wu, Qingbai,et al. Soil temperature dynamics and freezing processes for biocrustal soils in frozen soil regions on the Qinghai-Tibet Plateau[J]. GEODERMA,2022,409:11.
APA Ming, Jiao,Zhao, Yunge,Wu, Qingbai,He, Hailong,&Gao, Liqian.(2022).Soil temperature dynamics and freezing processes for biocrustal soils in frozen soil regions on the Qinghai-Tibet Plateau.GEODERMA,409,11.
MLA Ming, Jiao,et al."Soil temperature dynamics and freezing processes for biocrustal soils in frozen soil regions on the Qinghai-Tibet Plateau".GEODERMA 409(2022):11.

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来源：地理科学与资源研究所

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