气候变化领域集成服务门户(CCPortal): Remote sensing of ice motion in Antarctica

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DOI	10.1016/j.rse.2019.111595
	Remote sensing of ice motion in Antarctica – A review
	Dirscherl M.; Dietz A.J.; Dech S.; Kuenzer C.
发表日期	2020
ISSN	00344257
卷号	237
英文摘要	The Antarctic Ice Sheet holds ~91% of the global ice mass making it the biggest potential contributor to global sea-level-rise. In order to evaluate the ice sheet's present and future response to global climate change, detailed information about spatial and temporal ice mass dynamics is required. While ice sheet surface mass balance can be estimated from regional climate models, ice discharge is often determined from spaceborne measurements of ice thickness and ice motion at selected flux gates. The retrieval of ice motion is not only critical for analysing the rate of ice transport into the ocean but also for investigating the spatial and temporal pattern or the driving forcings of Antarctic ice flow dynamics. This study provides a comprehensive review of state-of-the-art spaceborne ice velocity measurements in Antarctica. Based on 201 scientific papers, published over the last three decades, our analysis revealed a dominant interest in local and regional scale investigations. Yet, the launch of the ERS-1/-2 and RADARSAT-1 SAR satellites in the 1990s dramatically increased data coverage over the Antarctic continent and enabled the first circum-antarctic velocity product to be published in the late 2000s. In recent years, the improved imaging capabilities of Landsat 8 led to a shift towards using mainly optical satellite data and enabled great advances in circum-antarctic velocity mapping. Data from the currently operating Sentinel-1/-2 missions was applied in fewer studies but will play a crucial role in future ice motion studies e.g. as part of ESA CCI projects. In addition, we found a growing interest in high temporal resolution velocity change analyses. Based on the reviewed studies, we moreover summarized the highly dynamic and locally variable flow pattern over the Antarctic continent being in accordance with varying local and regional driving mechanisms. Despite the great advances in spaceborne ice velocity mapping in Antarctica, we report some major drawbacks and discuss future challenges and requirements. To start with, our study uncovered strong variations regarding the spatial availability of investigations. While we found an aggregation of studies over selected glaciers, we report a major lack of studies in all three Antarctic sectors. Additionally, many velocity datasets were created with strongly heterogeneous output parameters and were provided at coarse temporal resolution or at point-based measurement locations only. Future studies should consequently aim at creating more uniform ice motion products at defined spatial and temporal coverage and resolution standards and at analysing particularly the least studied glaciers. © 2019 Elsevier Inc.
英文关键词	Antarctic ice sheet; Antarctica; Glacier dynamics; Glacier velocity; Ice flow; Ice flow dynamics; Ice motion; Ice sheet flow; Ice shelf dynamics; Ice shelf velocity; Ice velocity; Remote sensing
语种	英语
scopus关键词	Climate change; Climate models; Flow patterns; Geodetic satellites; Glacial geology; Glaciers; Mapping; Remote sensing; Sea level; Space-based radar; Synthetic aperture radar; Velocity; Antarctic ice sheets; Antarctica; Glacier dynamics; Ice flow; Ice flow dynamics; Ice motion; Ice shelves; Ice velocity; Ice-sheet flow; Ice; flow pattern; global climate; ice flow; ice movement; ice shelf; RADARSAT; regional climate; remote sensing; satellite data; Antarctic Ice Sheet; Antarctica
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/179499
作者单位	German Remote Sensing Data Center (DFD), German Aerospace Center (DLR), Münchener Str. 20, Wessling, 82234, Germany; Department of Remote Sensing, Institute of Geography and Geology, University Wuerzburg, Am Hubland, Wuerzburg, 97074, Germany
推荐引用方式 GB/T 7714	Dirscherl M.,Dietz A.J.,Dech S.,等. Remote sensing of ice motion in Antarctica – A review[J],2020,237.
APA	Dirscherl M.,Dietz A.J.,Dech S.,&Kuenzer C..(2020).Remote sensing of ice motion in Antarctica – A review.Remote Sensing of Environment,237.
MLA	Dirscherl M.,et al."Remote sensing of ice motion in Antarctica – A review".Remote Sensing of Environment 237(2020).