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DOI	10.1007/s00382-019-05055-x
	Spatiotemporal variations in 3.2 m soil temperature in China during 1980–2017
	Zhou Y.; Gao X.; Zhang K.; Li Y.; Yang L.
发表日期	2020
ISSN	0930-7575
起始页码	1233
结束页码	1244
卷号	54 期号:2020-01-02
英文摘要	Soil temperature is an important variable of earth’s surface system, and studying it is of great benefit to understanding the energy and hydrological cycles and climate change. Based on soil temperature data at a depth of 3.2 m from 113 stations in China from 1980 to 2017, the spatial distribution and temporal variation of the soil temperatures in China were analyzed by using a fuzzy C-means algorithm (FCM), linear fitting and the Mann–Kendall method. The results show that the average annual soil temperature at 3.2 m in China gradually increased from north to south, with the lowest temperatures in the northeast and Qinghai–Tibetan Plateau (T3.2m≤5∘C) and the highest in South China (T3.2m≥25∘C). The country is divided into 10 regions using the FCM method. The soil temperature anomalies show a continuous increase over time, but there are significant regional differences in the warming speeds. The northeast and northwest regions exhibit the largest temperature increases, approximately 0.57 °C/10a, North China has the second highest increases, with approximately 0.36 °C/10a, and the values in other areas are less than 0.3 °C/10a. Over the 38-year period, the soil temperature increased by approximately 1.4 °C , and the temperature increase mainly occurred during the last 20 years. The positive center of the annual soil temperature anomaly at 3.2 m in the Qinghai–Tibetan Plateau during the last 2 decades of the twentieth century became cooling to a negative soil temperature anomaly at 3.2 m during the first 2 decades of the twenty-first century. The negative centers for the annual soil temperature anomaly at 3.2 m in the south of Shaanxi and the middle reaches of the Yangtze River during the last 2 decades of the twentieth century became warming to positive soil temperature anomalies at 3.2 m in the first 2 decades of the twenty-first century. In the other regions, different turning points of the positive–negative temperature anomaly are exhibited at 3.2 m. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	China; Climate change; Land surface process; Land–air interactions; Soil heat flux; Soil temperature
语种	英语
scopus关键词	algorithm; climate change; heat flux; land surface; soil temperature; spatial distribution; temperature anomaly; temporal variation; trend analysis; China
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145721
作者单位	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, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China; PLA Unit 31682, Lanzhou, China
推荐引用方式 GB/T 7714	Zhou Y.,Gao X.,Zhang K.,等. Spatiotemporal variations in 3.2 m soil temperature in China during 1980–2017[J],2020,54(2020-01-02).
APA	Zhou Y.,Gao X.,Zhang K.,Li Y.,&Yang L..(2020).Spatiotemporal variations in 3.2 m soil temperature in China during 1980–2017.Climate Dynamics,54(2020-01-02).
MLA	Zhou Y.,et al."Spatiotemporal variations in 3.2 m soil temperature in China during 1980–2017".Climate Dynamics 54.2020-01-02(2020).