tómas jóhannesson 1, helgi björnsson 2, sverrir guðmundsson 2, eyjólfur magnússon 2, finnur...

Tómas Jóhannesson1, Helgi Björnsson2, Sverrir Guðmundsson2, Eyjólfur Magnússon2, Finnur Pálsson2, Oddur Sigurðsson1 and Þorsteinn

Þorsteinsson1

1Icelandic Meteorological Office2Institute of Earth Sciences, University of Iceland

Mapping the Surface and Surface Changes of Icelandic Ice Caps with

LIDAR

• Pooling of efforts of different nations and institutes• Legacy programmes, baseline measurements• Outreach to the publich to increase awareness about the

importance of polar areas

The glacier mapping in Iceland

The international polar year

• Participants: The Icelandic Meteorological Office, the Institute of Earth Sciences, University of Iceland

• Support/collaborators: Icelandic Research Fund (RANNIS, the Icelandic Centre for Research), Landsvirkjun (the National Power Company of Iceland), The Icelandic Public Road Administration, Reykjavík Energy Environmental and Energy Research Fund and the National Land Survey of Iceland, the Scott Polar Research Institute (Cambridge), Klima og luft gruppen (KoL) under the Nordic Council of Ministers.

• Contractor: TopScan, Rheine, Germany

Glacier surfaces are mapped with airborne laser scanning.It relies on the combination of high-precision DGPS positioning in kinematic mode, inertial systems, and laser distance measurements. Accuracy in elevation measurement better than 0.5 m.

2008:Mapping of Snæfellsjökull, Eiríksjökull and most of Hofsjökull (total mapped area ~800 km²)

2009:No mapping due to adverse weather conditions

2010:Completion of Hofsjökull, Mýrdalsjökull, Eyjafjallajökull, S- and SE-Vatnajökull

Total mapped area now is >4500 km² + ~900 km² on Langjökull (by SPRI) = ~5500 km²

5x5 or 10x10 m digital elevation models of the ice caps are produced

The new ice surface maps will make it possible to assess past ice volume changes since 1990-2000 using available maps together With InSAR and SPOT satellite data and future changes from remote sensing data that will become available after 2008-2011

The work progress

Eyjafjallajökull

Eyjafjallajökull, lava path and top crater

Eyjafjallajökull, jökulhlaup path, lahars