DOI: 10.1002/jgrd.50457
论文题名: Simulation of permafrost and seasonally frozen ground conditions on the Tibetan Plateau, 1981-2010
作者: Guo D. ; Wang H.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 11 起始页码: 5216
结束页码: 5230
语种: 英语
英文关键词: climate warming
; permafrost
; seasonally frozen ground
; Tibetan Plateau
Scopus关键词: Climate change
; Freezing
; Soils
; Climate warming
; Community land models
; High-resolution datum
; Scale mismatches
; Seasonally frozen ground
; Soil temperature
; Temporal and spatial
; Tibetan Plateau
; Permafrost
; active layer
; climate change
; data set
; frozen ground
; permafrost
; resolution
; seasonality
; soil temperature
; warming
; China
; Qinghai-Xizang Plateau
英文摘要: Permafrost and seasonally frozen ground conditions on the Tibetan Plateau were investigated using the Community Land Model, version 4 (CLM4), forced by a suite of new, high-resolution data. This new data set was highly accurate and had an advantage in the frozen ground simulations for its fine temporal and spatial resolution. The simulated current (1981-2000) near-surface permafrost area was 151.50 × 104 km2, which is close to, but slightly larger than, the range from previous studies (111.80 ∼ 150.0 × 104 km2). The simulated current active layer thicknesses ranged from 0 to 4.74 m, with an average of 2.01 m. The other frozen ground parameters, such as the maximum freezing depths for seasonally frozen ground, the date of freeze start, the date of freeze end, and the freeze duration at 1 m depth, were also examined. Considering the issue of scale mismatch, the simulated soil temperature and other frozen ground parameters were reasonable compared to our observations. In response to the Plateau warming of approximately 0.44°C/decade from 1981 to 2010, the near-surface permafrost area decreased at a rate of 9.20 × 104 km2/decade, and the area-mean active layer thickness increased by 0.15 m/decade. The area-mean maximum freezing depth of the seasonally frozen ground decreased by 0.34 m/decade. At a depth of 1 m, the dates of freeze start for permafrost and seasonally frozen ground delayed linearly by 3.8 and 4.0 days/decade, respectively, while the dates of freeze end for them advanced linearly by 5.9 and 4.6 days/decade, respectively. These trends in the dates of freeze start and freeze end resulted in freeze durations that were shortened by 9.7 and 8.6 days/decade for permafrost and seasonally frozen ground, respectively. These results give detailed permafrost and seasonally frozen ground states as well as their changes, which will be useful for studying frozen ground's response to climate change and frozen ground engineering stabilization. © 2013. American Geophysical Union. All Rights Reserved. 资助项目: 41130103
; 41210007
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63691
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Nansen-Zhu International Research Center (NZC), Institute of Atmospheric Physics, Chinese Academy of Sciences, PO Box 9804, Beijing 100029, China; Graduate University of Chinese Academy of Sciences, Beijing, China; Climate Change Research Center, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Guo D.,Wang H.. Simulation of permafrost and seasonally frozen ground conditions on the Tibetan Plateau, 1981-2010[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(11)