气候变化领域集成服务门户(CCPortal): Rapid retreat of permafrost coastline observed with aerial drone photogrammetry

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DOI	10.5194/tc-13-1513-2019
	Rapid retreat of permafrost coastline observed with aerial drone photogrammetry
	Cunliffe A.; Tanski G.; Radosavljevic B.; Palmer W.; Sachs T.; Lantuit H.; Kerby J.; Myers-Smith I.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	1513
结束页码	1528
卷号	13 期号:5 页码:1513-1528
英文摘要	Permafrost landscapes are changing around the Arctic in response to climate warming, with coastal erosion being one of the most prominent and hazardous features. Using drone platforms, satellite images, and historic aerial photographs, we observed the rapid retreat of a permafrost coastline on Qikiqtaruk - Herschel Island, Yukon Territory, in the Canadian Beaufort Sea. This coastline is adjacent to a gravel spit accommodating several culturally significant sites and is the logistical base for the Qikiqtaruk - Herschel Island Territorial Park operations. In this study we sought to (i) assess short-term coastal erosion dynamics over fine temporal resolution, (ii) evaluate short-term shoreline change in the context of long-term observations, and (iii) demonstrate the potential of low-cost lightweight unmanned aerial vehicles (drones) to inform coastline studies and management decisions. We resurveyed a 500m permafrost coastal reach at high temporal frequency (seven surveys over 40 d in 2017). Intra-seasonal shoreline changes were related to meteorological and oceanographic variables to understand controls on intra-seasonal erosion patterns. To put our short-term observations into historical context, we combined our analysis of shoreline positions in 2016 and 2017 with historical observations from 1952, 1970, 2000, and 2011. In just the summer of 2017, we observed coastal retreat of 14.5 m, more than 6 times faster than the long-term average rate of 2:20:1ma1 (1952-2017). Coastline retreat rates exceeded 1:00:1md1 over a single 4 d period. Over 40 d, we estimated removal of ca. 0.96m3 m1 d1. These findings highlight the episodic nature of shoreline change and the important role of storm events, which are poorly understood along permafrost coastlines. We found drone surveys combined with image-based modelling yield fine spatial resolution and accurately geolocated observations that are highly suitable to observe intra-seasonal erosion dynamics in rapidly changing Arctic landscapes. © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
WOS研究方向	Physical Geography ; Geology
scopus关键词	aerial photograph; coastal erosion; landscape; long-term change; permafrost; photogrammetry; shoreline change; spatial resolution; unmanned vehicle; Arctic; Arctic Ocean; Beaufort Sea; Canada; Herschel Island; Yukon Territory
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/97960
作者单位	Geography University of Exeter, Exeter, EX4 4RJ, United Kingdom; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; Faculty of Sciences Earth and Climate, Vrije Universiteit Amsterdam, Amsterdam, Netherlands; Department of Permafrost Research, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany; Landscapes, Paris, France; Neukom Institute for Computational Science, Dartmouth College, Hanover, NH, United States
推荐引用方式 GB/T 7714	Cunliffe A.,Tanski G.,Radosavljevic B.,et al. Rapid retreat of permafrost coastline observed with aerial drone photogrammetry[J],2019,13(5):1513-1528.
APA	Cunliffe A..,Tanski G..,Radosavljevic B..,Palmer W..,Sachs T..,...&Myers-Smith I..(2019).Rapid retreat of permafrost coastline observed with aerial drone photogrammetry.The Cryosphere,13(5),1513-1528.
MLA	Cunliffe A.,et al."Rapid retreat of permafrost coastline observed with aerial drone photogrammetry".The Cryosphere 13.5(2019):1513-1528.