| DOI: | 10.1016/j.gloplacha.2014.02.008
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| 论文题名: | Spatial variations in snow cover and seasonally frozen ground over northern China and Mongolia, 1988-2010 |
| 作者: | Han L.; Tsunekawa A.; Tsubo M.; He C.; Shen M.
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| ISSN: | 0921-8472
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| 出版年: | 2014
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| 卷: | 116 | | 起始页码: | 139
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| 结束页码: | 148
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| 语种: | 英语
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| 英文关键词: | Algorithm application
; Climatic warming
; Passive microwave remote sensing
; Remote sensing of frozen ground and snow
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| Scopus关键词: | Ablation
; Algorithms
; Remote sensing
; Soil mechanics
; Soils
; Thawing
; Climatic warming
; Frozen ground
; Maximum temperature
; Mountainous area
; Passive microwave remote sensing
; Seasonally frozen ground
; Spatial variations
; Spatiotemporal variability
; Snow
; algorithm
; freeze-thaw cycle
; frozen ground
; microwave radiation
; mountain region
; remote sensing
; seasonality
; snow cover
; spatiotemporal analysis
; China
; Eastern Equatoria
; Mongalla
; South Sudan
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| 英文摘要: | This study investigates the spatiotemporal variability of snow cover and seasonally frozen ground in northern China and Mongolia during 1988-2010 with passive microwave remote sensing records. We used the Goodison snow algorithm, adapted by introducing an additional soil freeze/thaw indicator to improve its efficiency in mountainous areas, and soil freeze-thaw algorithm to estimate snow cover onset, duration, ablation and, for the first time, interval between snow cover ablation and thawing of seasonally frozen ground. Snow cover onset, duration, and ablation tended to vary systematically from high to low latitudes, and to trend toward early/long/late in elevated areas. The ablation-thawing interval varied from low to high latitudes/elevations, and from dry to relatively humid areas, being shorter (<. 2. weeks) in the north and elevated areas but longer in some cold-dry and plain-mountain adjacent regions. During 1988-2010, snow cover showed a later/earlier trend of the onset/ablation on the western Tibetan Plateau and a belt from northeast China to central Mongolia, with trends being stronger in spring than in autumn. The time of snow cover ablation was negatively correlated with maximum temperature in the northern study area, indicating that temperature mainly advanced snow melting in spring. However, no significant relationship between temperature and the interval was observed, suggesting that other unknown factors impact the interval. Furthermore, in the north and on Mt. Changbai the interval changed by <. 2. weeks, whereas changes were larger in cold-dry and plain-mountain transitional areas, indicating changes of Earth surface systems in those areas. © 2014 Elsevier B.V. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896038361&doi=10.1016%2fj.gloplacha.2014.02.008&partnerID=40&md5=6b9a978f6e0f50241478beec2a5a4c01
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/11378
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| Appears in Collections: | 全球变化的国际研究计划
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作者单位: | State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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| Recommended Citation: | |
Han L.,Tsunekawa A.,Tsubo M.,et al. Spatial variations in snow cover and seasonally frozen ground over northern China and Mongolia, 1988-2010[J],2014-01-01,116.
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