气候变化领域集成服务门户(CCPortal): Variations in the top-layer soil freezing/thawing process from 2009 to 2018 in the Maqu area of the Tibetan Plateau

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DOI	10.1007/s00704-020-03382-2
	Variations in the top-layer soil freezing/thawing process from 2009 to 2018 in the Maqu area of the Tibetan Plateau
	Jia D.; Liu M.; Li K.; Wang X.; Wang Z.; Wen J.; Lai X.
发表日期	2021
ISSN	0177798X
起始页码	21
结束页码	32
卷号	143 期号:1
英文摘要	Considerable progress has been made in understanding the variation rules of the freezing/thawing period and soil water-heat exchange. With the use of meteorological and soil observation data, this study highlighted the importance of vegetation cover and soil moisture for the beginning of the freezing/thawing period, and an improved calculation equation of the soil moisture content was presented, which could be used to simulate the variation in soil moisture during the freezing/thawing period. Our analyses showed that the temperature changes at the beginning of the soil freezing month (December) and the soil thawing month (February) were significantly different from 2009 to 2018. The rate of air temperature increase in December reached 0.38 °C/a. However, the air temperature in February changed little. As a result, the beginning of the soil freezing period was clearly lagged, while the beginning of the soil thawing period fluctuated little. The total soil thawing time increased by 25 days over 10 years. Furthermore, it was shown that the surface vegetation cover and soil moisture affected the beginning of the freezing/thawing time. In general, the soil freezing/thawing state at sites with low vegetation cover and soil moisture content was more likely to change. To further study the freezing/thawing mechanism, the relationship between the soil temperature and soil moisture during the freezing/thawing period was expressed as a fitting function of the relationship between soil water and heat. It was shown that the relationship between the soil moisture and soil temperature followed the new fitting function in both warm and cold years. © 2020, Springer-Verlag GmbH Austria, part of Springer Nature.
语种	英语
scopus关键词	Theoretical and Applied Climatology
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158361
作者单位	Lanzhou City University; Lanzhou; China; Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions; Northwest Institute of Eco-Environment and Resources; Chinese Academy of Sciences; Lanzhou; China; Key Laboratory of Geographic Information Science; Ministry of Education; School of Geographic Sciences; East China Normal University; Shanghai; China; College of Atmospheric Sciences; Plateau Atmosphere and Environment Key Laboratory of Sichuan Province; Chengdu University of Information Technology; Chengdu; China
推荐引用方式 GB/T 7714	Jia D.,Liu M.,Li K.,et al. Variations in the top-layer soil freezing/thawing process from 2009 to 2018 in the Maqu area of the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,143(1).
APA	Jia D..,Liu M..,Li K..,Wang X..,Wang Z..,...&Lai X..(2021).Variations in the top-layer soil freezing/thawing process from 2009 to 2018 in the Maqu area of the Tibetan Plateau.,143(1).
MLA	Jia D.,et al."Variations in the top-layer soil freezing/thawing process from 2009 to 2018 in the Maqu area of the Tibetan Plateau".143.1(2021).