气候变化领域集成服务门户(CCPortal): Heterogeneous spatial and temporal pattern of surface elevation change and mass balance of the Patagonian ice fields between 2000 and 2016

CCPortal

DOI	10.5194/tc-13-2511-2019
	Heterogeneous spatial and temporal pattern of surface elevation change and mass balance of the Patagonian ice fields between 2000 and 2016
	Abdel Jaber W.; Rott H.; Floricioiu D.; Wuite J.; Miranda N.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	2511
结束页码	2535
卷号	13 期号:9
英文摘要	The northern and southern Patagonian ice fields (NPI and SPI) have been subject to accelerated retreat during the last decades, with considerable variability in magnitude and timing among individual glaciers. We derive spatially detailed maps of surface elevation change (SEC) of NPI and SPI from bistatic synthetic aperture radar (SAR) interferometry data of the Shuttle Radar Topography Mission (SRTM) and TerraSAR-X add-on for Digital Elevation Measurements (TanDEM-X) for two epochs, 2000-2012 and 2012-2016, and provide data on changes in surface elevation and ice volume for the individual glaciers and the ice fields at large. We apply advanced TanDEM-X processing techniques allowing us to cover 90% and 95% of the area of NPI and 97% and 98% of SPI for the two epochs, respectively. Particular attention is paid to precisely co-registering the digital elevation models (DEMs), accounting for possible effects of radar signal penetration through backscatter analysis and correcting for seasonality biases in case of deviations in repeat DEM coverage from full annual time spans. The results show a different temporal trend between the two ice fields and reveal a heterogeneous spatial pattern of SEC and mass balance caused by different sensitivities with respect to direct climatic forcing and ice flow dynamics of individual glaciers. The estimated volume change rates for NPI are-4:26±0:20 km3 a-1 for epoch 1 and-5:60±0:74 km3 a-1 for epoch 2, while for SPI these are -14:87±0:52 km3 a-1 for epoch 1 and -11:86±1:99 km3 a-1 for epoch 2. This corresponds for both ice fields to an eustatic sea level rise of 0:048±0:002mma-1 for epoch 1 and 0:043±0:005mma-1 for epoch 2. On SPI the spatial pattern of surface elevation change is more complex than on NPI and the temporal trend is less uniform. On terminus sections of the main calving glaciers of SPI, temporal variations in flow velocities are a main factor for differences in SEC between the two epochs. Striking differences are observed even on adjoining glaciers, such as Upsala Glacier, with decreasing mass losses associated with slowdown of flow velocity, contrasting with acceleration and increase in mass losses on Viedma Glacier. © Author(s) 2019.
学科领域	backscatter; digital elevation model; glacier; ice flow; iceberg calving; mass balance; Shuttle Radar Topography Mission; spatiotemporal analysis; TanDEM-X; TerraSAR-X; Argentina; Santa Cruz [Argentina]; Sweden; Uppsala [Sweden]; Uppsala [Uppsala (CNT)]; Viedma Glacier
语种	英语
scopus关键词	backscatter; digital elevation model; glacier; ice flow; iceberg calving; mass balance; Shuttle Radar Topography Mission; spatiotemporal analysis; TanDEM-X; TerraSAR-X; Argentina; Santa Cruz [Argentina]; Sweden; Uppsala [Sweden]; Uppsala [Uppsala (CNT)]; Viedma Glacier
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/118832
作者单位	Remote Sensing Technology Institute (IMF), German Aerospace Center (DLR), Oberpfaffenhofen, Germany; ENVEO IT GmbH, Innsbruck, Austria; Institute of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria; European Space Agency (ESA)-ESRIN, Frascati, Italy
推荐引用方式 GB/T 7714	Abdel Jaber W.,Rott H.,Floricioiu D.,et al. Heterogeneous spatial and temporal pattern of surface elevation change and mass balance of the Patagonian ice fields between 2000 and 2016[J],2019,13(9).
APA	Abdel Jaber W.,Rott H.,Floricioiu D.,Wuite J.,&Miranda N..(2019).Heterogeneous spatial and temporal pattern of surface elevation change and mass balance of the Patagonian ice fields between 2000 and 2016.The Cryosphere,13(9).
MLA	Abdel Jaber W.,et al."Heterogeneous spatial and temporal pattern of surface elevation change and mass balance of the Patagonian ice fields between 2000 and 2016".The Cryosphere 13.9(2019).