Response of Eyjafjallajökull, Torfajökull and Tindfjallajökull ice caps in Iceland to regional warming, deduced by remote sensing

Polar research

Etienne Berthier¹  Finnur Pálsson²  Magnús Tumi Gudmundsson²  Thórdís Högnadóttir²  Helgi Björnsson²  Eyjólfur Magnússon²  Sverrir Gudmundsson³  Jørgen Dall⁴ 

[1] Centre National de la Recherche Scientifique, Université de Toulouse, Laboratoire d'Etudes en Géophysique et Océanographie Spatiale Université de Toulouse 14 Avenue Edouard BelinToulouse, FR-31400, France;Institute of Earth Sciences, University of Iceland Sturlugata 7Askja, Reykjavík, IS-101, Iceland;Institute of Earth Sciences, University of Iceland Sturlugata 7Askja, Reykjavík, IS-101, Iceland Correspondence;National Space Institute, Technical University of DenmarkLyngby, DK-2800, Denmark

关键词: Remote sensing;    glacier mass balance;    regional warming;    Eyjafjallajökull;    Torfajökull;    Tindfjallajökull.;   

DOI  :  10.3402/polar.v30i0.7282

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

We assess the volume change and mass balance of three ice caps in southern Iceland for two periods, 1979–1984 to 1998 and 1998 to 2004, by comparing digital elevation models (DEMs). The ice caps are Eyjafjallajökull (ca. 81 km2), Tindfjallajökull (ca. 15 km2) and Torfajökull (ca. 14 km2). The DEMs were compiled using aerial photographs from 1979 to 1984, airborne Synthetic Aperture Radar (SAR) images obtained in 1998 and two image pairs from the SPOT 5 satellite's high-resolution stereoscopic (HRS) instrument acquired in 2004. The ice-free part of the accurate DEM from 1998 was used as a reference map for co-registration and correction of the vertical offset of the other DEMs. The average specific mass balance was estimated from the mean elevation difference between glaciated areas of the DEMs. The glacier mass balance declined significantly between the two periods: from −0.2 to 0.2 m yr−1 w. eq. during the earlier period (1980s through 1998) to −1.8 to −1.5 m yr−1 w. eq. for the more recent period (1998–...

【 授权许可】

CC BY-NC