DOI: 10.1002/2017JF004326
Scopus记录号: 2-s2.0-85043793509
论文题名: Variability in Rates of Coastal Change Along the Yukon Coast, 1951 to 2015
作者: Irrgang A.M. ; Lantuit H. ; Manson G.K. ; Günther F. ; Grosse G. ; Overduin P.P.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期: 4 起始页码: 779
结束页码: 800
语种: 英语
英文关键词: Arctic coastal dynamics
; Beaufort coast
; DSAS analysis
; permafrost
; shoreline change
Scopus关键词: coastal morphology
; erosion rate
; GPS
; permafrost
; photogrammetry
; satellite imagery
; shoreline change
; Alaska
; Beaufort Coastal Plain
; Canada
; United States
; Yukon Territory
英文摘要: To better understand the reaction of Arctic coasts to increasing environmental pressure, coastal changes along a 210-km length of the Yukon Territory coast in north-west Canada were investigated. Shoreline positions were acquired from aerial and satellite images between 1951 and 2011. Shoreline change rates were calculated for multiple time periods along the entire coast and at six key sites. Additionally, Differential Global Positioning System (DGPS) measurements of shoreline positions from seven field sites were used to analyze coastal dynamics from 1991 to 2015 at higher spatial resolution. The whole coast has a consistent, spatially averaged mean rate of shoreline change of 0.7 ± 0.2 m/a with a general trend of decreasing erosion from west to east. Additional data from six key sites shows that the mean shoreline change rate decreased from −1.3 ± 0.8 (1950s–1970s) to −0.5 ± 0.6 m/a (1970s–1990s). This was followed by a significant increase in shoreline change to −1.3 ± 0.3 m/a in the 1990s to 2011. This increase is confirmed by DGPS measurements that indicate increased erosion rates at local rates up to −8.9 m/a since 2006. Ground surveys and observations with remote sensing data indicate that the current rate of shoreline retreat along some parts of the Yukon coast is higher than at any time before in the 64-year-long observation record. Enhanced availability of material in turn might favor the buildup of gravel features, which have been growing in extent throughout the last six decades. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114229
Appears in Collections: 气候减缓与适应
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作者单位: Department of Periglacial Research, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany; Institute of Earth and Environmental Science, University of Potsdam, Postdam, Germany; Geological Survey of Canada-Atlantic, Dartmouth, Canada
Recommended Citation:
Irrgang A.M.,Lantuit H.,Manson G.K.,et al. Variability in Rates of Coastal Change Along the Yukon Coast, 1951 to 2015[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(4)