气候变化领域集成服务门户(CCPortal): Changes of glacier facies on Hornsund glaciers (Svalbard) during the decade 2007

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DOI	10.1016/j.rse.2020.112060
	Changes of glacier facies on Hornsund glaciers (Svalbard) during the decade 2007–2017
	Barzycka B.; Grabiec M.; Błaszczyk M.; Ignatiuk D.; Laska M.; Hagen J.O.; Jania J.
发表日期	2020
ISSN	00344257
卷号	251
英文摘要	Changes in glacier facies (glacier zones), such as firn or superimposed ice (SI), are good indicators of glacier response to climate change. They are especially important for fast-warming Svalbard, where only a few glaciers are under glaciological mass balance monitoring. This paper presents a first study of changes of glacier facies extent for three tidewater glaciers located in southern Spitsbergen (Svalbard) and it is based on both satellite remote sensing and terrestrial data analysis, covering two time spans: 2007–2017 for Hansbreen and 2012–2017 for Storbreen and Hornbreen. Satellite remote sensing analysis include unsupervised classification of Synthetic Aperture Radar (SAR) data from both decommissioned (ENVISAT ASAR) and modern satellite missions (RADARSAT-2, Sentinel-1). The results of the SAR classification are compared to the information on glacier zones retrieved from terrestrial data, i.e. shallow cores and visual interpretation of 800 MHz Ground Penetrating Radar (GPR) profiles. In addition, a novel application of the Internal Reflection Power (IRP) coefficient as an objective method of distinguishing glacier zones based on GPR data is discussed. Changes in glacier facies areas over time are analysed, as well as their correlation to Hansbreen's mass balance. The main finding of the study is that firn and SI of Hansbreen, Storbreen and Hornbreen significantly decreased over the study period. For example, due to continuous negative mass balance between 2010 and 2017, the contribution of firn area to Hansbreen's total area decreased ca. 14% (cumulative firn area loss during that time: ~45%) whereas since 2012 SI has not been distinguished as a vast area on this glacier. In addition, an east–west gradient of firn area loss was observed as a result of differences in local climate conditions. Therefore, for the common time span (i.e. 2012–2017) Hansbreen recorded a ca. 12% loss of firn contribution to glacier area whereas Hornbreen recorded ca. 9%. Finally, application of the IRP coefficient as an objective method of glacier zones discrimination by GPR data gave very good results, so the method is recommended for future analysis of glacier zones instead, or as a support, to popular visual interpretation of the GPR profiles. © 2020 Elsevier Inc.
英文关键词	Firn; Glacier facies; Glacier zones; Ground Penetrating Radar (GPR); Hornsund; Internal Reflection Power (IRP); Mass balance; Superimposed ice; Svalbard; Synthetic Aperture Radar (SAR)
语种	英语
scopus关键词	Classification (of information); Climate change; Geodetic satellites; Geological surveys; Geophysical prospecting; Ground penetrating radar systems; Remote sensing; Synthetic aperture radar; Ground penetrating radar (GPR); Internal reflections; Novel applications; Objective methods; Satellite remote sensing; Tidewater glaciers; Unsupervised classification; Visual interpretation; Space-based radar; climate change; Envisat; glacier; glacier mass balance; ground penetrating radar; RADARSAT; remote sensing; satellite data; spatiotemporal analysis; unsupervised classification; Arctic; Hansbreen; Hornsund; Norway; Oppland; Spitsbergen; Storbreen; Svalbard; Svalbard and Jan Mayen
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179114
作者单位	University of Silesia in Katowice, Faculty of Natural Sciences, Institute of Earth Sciences, Poland; Svalbard Integrated Arctic Earth Observing System - Knowledge Centre (SIOS-KC), Norway; University of Oslo, Department of Geosciences, Norway
推荐引用方式 GB/T 7714	Barzycka B.,Grabiec M.,Błaszczyk M.,等. Changes of glacier facies on Hornsund glaciers (Svalbard) during the decade 2007–2017[J],2020,251.
APA	Barzycka B..,Grabiec M..,Błaszczyk M..,Ignatiuk D..,Laska M..,...&Jania J..(2020).Changes of glacier facies on Hornsund glaciers (Svalbard) during the decade 2007–2017.Remote Sensing of Environment,251.
MLA	Barzycka B.,et al."Changes of glacier facies on Hornsund glaciers (Svalbard) during the decade 2007–2017".Remote Sensing of Environment 251(2020).