globalchange  > 气候减缓与适应
DOI: 10.1016/j.gloplacha.2018.09.016
WOS记录号: WOS:000456222800012
论文题名:
Spatial distributions and temporal variations of the near-surface soil freeze state across China under climate change
作者: Wang, Xiqiang1,2; Chen, Rensheng1; Liu, Guohua1,2; Yang, Yong1; Song, Yaoxuan1; Liu, Junfeng1; Liu, Zhangwen1; Han, Chuntan1; Liu, Xiaojiao1,2; Guo, Shuhai1,2; Wang, Lei1,2; Zheng, Qin1,2
通讯作者: Chen, Rensheng
刊名: GLOBAL AND PLANETARY CHANGE
ISSN: 0921-8181
EISSN: 1872-6364
出版年: 2019
卷: 172, 页码:150-158
语种: 英语
英文关键词: Freeze state ; Spatial distribution ; Temporal variation ; Frozen ground region ; Climate warming
WOS关键词: PERMAFROST REGIONS ; ACTIVE LAYER ; TIME-SERIES ; FROZEN ; THAW ; PRECIPITATION ; TEMPERATURE ; DYNAMICS ; REGIMES
WOS学科分类: Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向: Physical Geography ; Geology
英文摘要:

The near-surface soil freeze state is affected by global warming, and its changes have profound effects on landscapes, ecosystems and hydrological processes. On the basis of daily soil freeze observational data at 476 meteorological stations over 50 freezing years from September 1, 1961 to August 31, 2011, the spatial distributions and temporal variations of the near-surface soil freeze state were estimated using five freeze variables (first date, last date, maximum seasonally frozen depth, duration and actual number of freeze days) across China, which was divided into three regions (eastern China, northwestern China and the Qinghai-Tibetan Plateau (QTP)). The near-surface soil freeze state varied greatly across China. The QTP has an earlier freeze, later thaw, longer freeze days and deeper seasonally frozen depth than the other two regions. The spatial distributions of the near-surface soil freeze state can be explained largely by altitude in northwestern China and on the QTP, whereas they can be explained by latitude in eastern China. The near-surface soil freeze state has changed significantly over 50 freezing years. On average across China over the study period, the first date of freezing was delayed by approximately 10 +/- 1 days with a rate of 0.20 +/- 0.02 days/year, the last date advanced by approximately 18 +/- 2 days with a rate of 0.36 +/- 0.04 days/year, the duration and the number of freeze days decreased by 28 +/- 2 and 23 +/- 2 days with rates of 0.56 +/- 0.04 and 0.45 +/- 0.04 days/year, respectively, and the maximum seasonally frozen depth decreased by 20 +/- 3 cm with a rate of 0.41 +/- 0.06 cm/year. The change in the freeze variables is relatively large in high-latitude and high-altitude regions.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/126514
Appears in Collections:气候减缓与适应

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作者单位: 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Qilian Alpine Ecol & Hydrol Res Stn, Lanzhou 730000, Gansu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Wang, Xiqiang,Chen, Rensheng,Liu, Guohua,et al. Spatial distributions and temporal variations of the near-surface soil freeze state across China under climate change[J]. GLOBAL AND PLANETARY CHANGE,2019-01-01,172:150-158
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