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Tijm-Reijmer Institute for Marine and Atmospheric Research Utrecht Utrecht University, The Netherlands 1 2 CONTENTS Preface..............................................................................................7 Johannes Oerlemans Program............................................................................................9 List of participants.........................................................................12 Abstracts........................................................................................15 Rapid thinning of Langfjordjøkelen in northern Norway...............16 Liss M. Andreassen, Bjarne Kjøllmoen, Al Rasmussen and Øyvind Nordli A first order model of calving glacier dynamics............................20 Doug Benn, Nick Hulton and Ruth Mottram Geometry, mass balance and climate change response of Langjökull ice cap, Iceland...........................................................22 Helgi Björnsson, Sverrir Gu(cid:1)mundsson, Tómas Jóhannesson, Finnur Pálsson, Gu(cid:1)finna A(cid:1)elgeirsdóttir and Hannes H. Haraldsson Focus on the Arctic calving glaciers: Promotion of the IPY GLACIODYN project and glaciological knowledge within tourists - our taxpayers...............................................................................26 Elisabeth Bukowska-Jania, J. Jania, P. Glowacki, L. Kolondra and M. Grabiec Dynamical downscaling of ERA-40 precipitation for modeling snow accumulation on ice caps in Iceland............................................30 Philippe Crochet, Tómas Jóhannesson, Oddur Sigur(cid:1)sson, Helgi Björnsson and Finnur Pálsson The Effect of the Firn layer on glacial runoff of Hofsjökull ice cap, Iceland.........................................................................................32 Mattias de Woul, Regine Hock, Matthias Braun, Thorsteinn Thorsteinsson, Tómas Jóhannesson and Stefanía Halldórsdóttir Regional climate modeling of the Greenland ice sheet................34 Janneke Ettema, Michiel van den Broeke, Erik van Meijgaard, Jonathan Bamber, Rupert Gladstone and Jennifer Griggs Changes in geometry and hydrothermal structure of Fridtjovbreen, a polythermal glacier in Spitsbergen, following its surge in the 1990s model................................................................................39 Andrey Glazovsky, I.I. Lavrentiev, Yu.Ya. Macheret, F.J. Navarro and E.V. Vasilenko Calving glaciers of Novaya Zemblya and Franz Joseph Land.....43 Andrey Glazovsky, Yury Macheret and Evgeny Vasilenko 3 Assessment of the surface mass balance of 18 Svalbard glaciers from the MODIS/Terra albedo product.........................................45 Wouter Greuell, Jack Kohler, Friedrich Obleitner, Piotr Glowacki, Kjetil Melvold, Erik Bernsen and Johannes Oerlemans More on elevation changes on Austfonna Ice Cap ......................49 Jon Ove Hagen, Trond Eiken, Even Loe, Jack Kohler, Ketil Melvold, Thomas V. Schuler and Andrea Taurisano Engabreen - Mass balance results and the Svartisen subglacial laboratory.....................................................................................52 Miriam Jackson and Hallgeir Elvehøy Changes in the topography of selected glaciers in southern Spitsbergen in the light of the GPS survey in 2005......................54 Jacek Jania, Mariusz Grabiec, Grzegorz Gajek, Leszek Kolondra, Piotr Glowacki and Dariusz Puczko Long-term high arctic mass balance: comparison of balances and volume changes on Midre Lovénbreen, Svalbard........................60 Jack Kohler, Chris Nuth, Ola Brandt, Tavi Murray, Tim James and Nick Barrand Energy and mass balance at Etonbreen, Austfonna....................63 Even Loe, Trond Eiken, Jon Ove Hagen, Kjetil Melvold, Thomas Schuler and Andrea Taurisano Mass balance and velocity studies on McCall Glacier.................65 Matt Nolan Short scale variations in mass balance and density of the Greenland snowpack and firn......................................................67 Victoria Parry, Peter Nienow, Douglas Mair, Jemma Wadham, Bryn Hubbard and Julian Scott Columbia Glacier at Mid-Retreat..................................................70 Tad Pfeffer Considerations on short-term and seasonal fluctuations of Hansbreen - a Svalbard tidewater glacier....................................73 Dariusz Puczko, Jacek A. Jania, Piotr G(cid:3)owacki and Krzysztof Miga(cid:3)a Modelling future glacier mass balance and volume changes of Storglaciären, Sweden, using ERA40-reanalysis and climate models data.................................................................................78 Valentina Radi(cid:4) and Regine Hock The multi-layer snow model SOMARS in a distributed energy and mass balance model....................................................................81 Carleen Reijmer and Regine Hock A surface mass balance model for Austfonna, Svalbard..............86 Thomas V. Schuler, Trond Eiken, Jon Ove Hagen, Even Loe, Kjetil Melvold, Andrea Taurisano 4 Exegesis of interferometric and altimetric observations in South Spitsbergen..................................................................................88 Aleksey I. Sharov Parameterizing scalar transfer over a rough ice surface..............94 Paul Smeets and Michiel van den Broeke Asessing unaspirated temperature measurements using a thermocouple and a physically based model...............................99 Paul Smeets Dynamics of large tidewater glaciers in East Greenland: recent results from satellite remote sensing and fieldwork ...................102 Leigh Stearns and Gordon Hamilton New results from geodetic mass budget studies at Swiss Camp (Greenland) and extension of research area to lower altitudes..105 Manfred Stober A Statistical Approach to Estimating the Contribution of Glaciers to Future Sea-level Rise................................................................110 Andy Wright, Ros Death, Tony Payne and Jemma Wadham GLACIODYN .................................................................................111 GLACIODYN planning meeting.................................................112 Contributions..............................................................................115 5 6 PREFACE The Working Group on Arctic Glaciology of the International Arctic Science Committee (IASC-WAG) held its 2006 - workshop on the mass budget of Arctic glaciers in Obergurgl, Austria. The meeting was hosted by the teaching and conference centre of the University of Innsbruck, and once more this location turned out to be an outstanding one. The pleasant atmosphere in the centre, the excellent conference facilities and the splendid surroundings all contributed to a very successful meeting. About 40 scientific contributions were presented (10 posters and 30 oral presentations) on a range of subjects, but with a focus on the mass budget of Arctic glaciers. Extended abstracts of many of these presentations can be found in this book. This year the IASC-WAG workshop was combined with the first planning meeting of GLACIODYN, an IPY-endorsed project in which the dynamic response of arctic glaciers to climate warming will be studied with a variety of techniques. GLACIODYN is now starting and it is expected to continue for several years following the official IPY (2007-08). Scientists from 17 nations plan to contribute to GLACIODYN. The main aim of the first planning meeting was to become acquainted with plans of individual institutes/research groups and to see how logistics facilities, technical expertise and modelling expertise can be shared among the participants. Some more information on GLACIODYN and on the meeting can be found in this book. No doubt there will be another workshop next year (probably in March 2007). Interested persons may visit the website of the IASC-WAG, where more information will be posted later this year. [website: www.phys.uu.nl/%7Ewwwimau/research/ice_climate/iasc_wag/] I am indebted to Professor Michael Kuhn und Angelika Neuner (University of Innsbruck) for their help in the organization of this meeting. I like to thank the Institute for Marine and Atmospheric Research of Utrecht University (IMAU) for the generous support that made it possible to print this report. I am particularly grateful to Carleen Tijm-Reijmer for chasing the participants to submit their texts and for doing all the editorial work. Johannes Oerlemans Chairman, IASC Working Group on Arctic Glaciology 7 8 PROGRAM Monday 30 • 13:00 – 13:20 Johannes Oerlemans: Welcome • 13:20 – 13:40 Jonathan Bamber: Modelling the past and future mass balance of the Greenland ice sheet within a climate model • 13:40 – 14:00 Janneke Ettema: Regional climate modelling of the Greenland ice sheet • 14:00 – 14:20 Manfred Stober: New results from geodetic mass budget studies at Swiss Camp (Greenland) and extension of research area to lower altitudes. • 14:20 – 14:40 Roderik van de Wal and IMAU members: Mass balance measurement along the K-transect Greenland 14:40 – 15:10 Coffee break • 15:10 – 15:30 Paul Smeets and M. van den Broeke: Scalar roughness length observations at the Greenland ice sheet over a wide range of ice surface roughness • 15:30 – 15:50 Carleen Reijmer and R. Hock: A multi layer snow model (SOMARS) in a distributed energy balance model • 15:50 – 16:10 Regine Hock and V. Radic: Modelling future glacier mass balance and volume changes using ERA40-reanalysis and climate models data • 16:10 – 16:30 Friedrich Obleitner: Critical issues in modelling Arctic snow 19:00 – Dinner Tuesday 31 • 09:00 – 09:15 Gordon Hamilton: Dynamics of large tidewater glaciers in East Greenland: recent results from satellite remote sensing and fieldwork Part1 • 09:15 – 09:30 Leigh Stearns: Dynamics of large tidewater glaciers in East Greenland: recent results from satellite remote sensing and fieldwork Part 2 • 09:30 – 09:50 Andrey Glazovsky and Yu.Ya. Macheret: Calving glaciers of Franz Josef Land and Novaya Zemlya • 09:50 – 10:10 Dariusz Puczko, J. Jania, P. Glowacki, K. Migala: Considerations on diurnal and seasonal fluctuations of velocity of Hansbreen a Svalbard tidewater glacier 10:10 – 10:40 Coffee break • 10:40 – 11:00 Carl Egede Bøggild: Thinning of the south Greenland ice sheet margin • 11:00 – 11:20 Doug Benn, N. Hulton, R. Mottram: Mass loss by calving: a new theoretical framework • 11:20 – 11:40 Johannes Oerlemans: Simple modelling of tidewater glaciers with sediment dynamics • 11:40 – 12:00 Jack Kohler: Long-term high arctic mass balance: comparison of balances and volume changes on Midre Lovénbreen, Svalbard 9