气候变化领域集成服务门户(CCPortal): Modelling and mapping climate change impacts on permafrost at high spatial resolution for an Arctic region with complex terrain

CCPortal

DOI	10.5194/tc-7-1121-2013
	Modelling and mapping climate change impacts on permafrost at high spatial resolution for an Arctic region with complex terrain
	Zhang Y.; Wang X.; Fraser R.; Olthof I.; Chen W.; McLennan D.; Ponomarenko S.; Wu W.
发表日期	2013
ISSN	19940416
卷号	7 期号:4
英文摘要	Most spatial modelling of climate change impacts on permafrost has been conducted at half-degree latitude/longitude or coarser spatial resolution. At such coarse resolution, topographic effects on insolation cannot be considered accurately and the results are not suitable for land-use planning and ecological assessment. Here we mapped climate change impacts on permafrost from 1968 to 2100 at 10 m resolution using a process-based model for Ivvavik National Park, an Arctic region with complex terrain in northern Yukon, Canada. Soil and drainage conditions were defined based on ecosystem types, which were mapped using SPOT imagery. Leaf area indices were mapped using Landsat imagery and the ecosystem map. Climate distribution was estimated based on elevation and station observations, and the effects of topography on insolation were calculated based on slope, aspect and viewshed. To reduce computation time, we clustered climate distribution and topographic effects on insolation into discrete types. The modelled active-layer thickness and permafrost distribution were comparable with field observations and other studies. The map portrayed large variations in active-layer thickness, with ecosystem types being the most important controlling variable, followed by climate, including topographic effects on insolation. The results show deepening in active-layer thickness and progressive degradation of permafrost, although permafrost will persist in most of the park during the 21st century. This study also shows that ground conditions and climate scenarios are the major sources of uncertainty for high-resolution permafrost mapping. © 2013 Author(s).
学科领域	active layer; arctic environment; climate change; complex terrain; land use planning; Landsat; mapping; permafrost; satellite imagery; spatial resolution; topographic effect; twenty first century; environmental assessment; environmental degradation; mapping method; numerical model; terrain; Arctic; Canada; Ivvavik National Park; Yukon Territory
语种	英语
scopus关键词	active layer; arctic environment; climate change; complex terrain; land use planning; Landsat; mapping; permafrost; satellite imagery; spatial resolution; topographic effect; twenty first century; environmental assessment; environmental degradation; mapping method; numerical model; terrain; Arctic; Canada; Ivvavik National Park; Yukon Territory
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120281
作者单位	Canada Centre for Remote Sensing, Natural Resources Canada, Ottawa, ON K1A 0Y7, Canada; College of Resources and Environmental Science, Hebei Normal University, Shijiazhuang, Hebei, 050024, China; Parks Canada Agency, Hull, QC K1A 0M5, Canada; Western and Northern Service Centre, Parks Canada Agency, Winnipeg, MB R3B 0R9, Canada
推荐引用方式 GB/T 7714	Zhang Y.,Wang X.,Fraser R.,et al. Modelling and mapping climate change impacts on permafrost at high spatial resolution for an Arctic region with complex terrain[J],2013,7(4).
APA	Zhang Y..,Wang X..,Fraser R..,Olthof I..,Chen W..,...&Wu W..(2013).Modelling and mapping climate change impacts on permafrost at high spatial resolution for an Arctic region with complex terrain.Cryosphere,7(4).
MLA	Zhang Y.,et al."Modelling and mapping climate change impacts on permafrost at high spatial resolution for an Arctic region with complex terrain".Cryosphere 7.4(2013).