The Cryosphere Discussions www.the-cryosphere-discuss.net 1994-0432 1994-0440 4 1 2010 10.5194/tcd-4-347-2010 http://www.the-cryosphere-discuss.net/4/347/2010/ http://www.the-cryosphere-discuss.net/4/347/2010/tcd-4-347-2010.html http://www.the-cryosphere-discuss.net/4/347/2010/tcd-4-347-2010.pdf 347 379 2010-03-25 Determination of length, area, and volume changes at Storglaciären, Sweden, from multi-temporal aerial images (1959–1999) T. Koblet thomas.koblet@gmail.com I. Gärtner-Roer M. Zemp P. Jansson P. Thee W. Haeberli P. Homlund Department of Geography, University of Zurich, Winterthurerstr. 190, 8057 Zürich, Switzerland Department of Physical Geography and Quaternary Geology, 106 91 Stockholm, Sweden Swiss Federal Institute for Forest, Snow and Landscape Research, Zürcherstr. 111, 8903 Birmensdorf, Switzerland Storglaciären, located in the Kebnekaise massif in northern Sweden, has a long history of glaciological research. Early photo documentations date back to the late 19th century. Measurements of front position variations and distributed mass balance have been carried out since 1910 and 1945/46, respectively. In addition to these in-situ measurements, aerial photographs have been taken at decadal intervals since the beginning of the mass balance monitoring program and were used to produce glaciological maps. Inaccuracies in the maps were a challenge to early attempts to derive glacier volume changes and resulted in major differences when compared to the direct glaciological mass balances. In this study, we reanalyzed dia-positives of the original aerial photographs of 1959, -69, -80, -90 and -99 based on consistent photogrammetric processing. From the resulting digital elevation models and orthophotos, changes in length, area, and volume of Storglaciären are computed between the survey years, including an assessment of related errors. Between 1959 and 1999, Storglaciären lost an ice volume of 19×10⁶ m³, which corresponds to a cumulative ice thickness loss of 5.69 m and a mean annual loss of 0.14 m. This ice loss resulted largely from a strong volume loss during the period 1959–1980 and was partly compensated during the period 1980–1999. As a consequence, the glacier shows a strong retreat in the 1960s, a slowing in the 1970s, and pseudo-stationary conditions in the 1980s and 1990s. Albrecht, O., Jansson, P., and Blatter, H.: Modelling glacier response to measured mass-balance forcing, Ann. Glaciol., 31, 91–96, 2000. Andreassen, L. M., Elvehøy, H., Kjøllmoen, B., Engeset, R. V., and Haakensen, N.: Glacier mass balance and length variations in Norway, Ann. Glaciol., 42, 317–325, 2005. Björnsson, H.: Radio-echo sounding maps of Storglaciären, Isfallsglaciären and Robots Glaciär, northern Sweden, Geogr. Ann., 63A(3–4), 225–231, 1981. Böhm, R., Auer, I., Brunetti, M., Maugeri, M., Nanni, T., and Schöner, W.: Regional temperature variability in the European Alps: 1760–1998 from homogenized instrumental time series, Int. J. Climatol., 21, 1779–1801, 2001. Bomark, M. and Lundberg, C.: GPS-Mätning i Tarfala 1994, Master's thesis, Institutionen för Geodesi och Fotogrammetri Kungliga Tekniska Högskolan, Stockholm, 1995. Burrough, P. A. and McDonnell, R. A.: Principles of geographic information systems, Oxford University Press, New York, 1998. Eriksson, M. G., Björnsson, H., Herzfeld, U. C., and Holmlund, P.: The bottom topography of Storglaciären, Department of Physical Geography, Stockholm University, Stockholm, 1993. Fisher, P. F. and Tate, N. J.: Causes and consequences of error in digital elevation models, Progr. Phys. Geogr., 30(4), 467–489, 2006. Gousie, M. B.: Digital elevation model error detection and visualization, The 4th Workshop on Dynamic & Multi-dimensional GIS, 42–46, 2005. Grove, J. M.: Little Ice Ages: Ancient and modern, vol. 1+2, Routledge, London and New York, 2 edn., 2004. Grudd, H. and Schneider, T.: Air temperature at Tarfala Research Station 1946–1995, Geogr. Ann., 78A(2–3), 115–120, 1996. Haeberli, W.: Glaciers and ice caps: historical background and strategies of world-wide monitoring, in: Mass balance of the cryosphere, edited by: Bamber, J. L. and Payne, A. J., Cambridge University Press, Cambridge, 559–578, 2004. Heuvelink, G. B. M.: Error propagation in environmental modelling with GIS, Taylor & Francis Ltd, London, 1998. Hock, R.: A distributed temperature-index ice- and snowmelt model including potential solar radiation, J. Glaciol., 45(149), 101–111, 1999. Hock, R. And Noetzli, C.: Areal melt and discharge modelling of Storglaciären, Sweden, Ann. Glaciol., 24, 211–216, 1997. Hock, R. and Holmgren, B.: A distributed surface energy-balance model for complex topography and its application to Storglaciären, Sweden, J. Glaciol., 51(172), 25–36, 2005. Hock, R., Hulth, J., and Pettersson, R.: Mass balance of Storglaciären, Sweden – re-evaluation and error assessment, Abstract, Workshop on mass balance measurements and modelling, Skeikampen, Norway, 2008. Holmlund, P.: Mass balance of Storglaciären during 20th Century, Geogr. Ann., 69, 439–447, 1987. Holmlund, P.: Maps of Storglaciären and their use in glacier monitoring studies, Geogr. Ann., 78A(2–3), 193–196, 1996. Holmlund, P. and Eriksson, M.: The cold surface layer on Storglaciären, Geogr. Ann., 71A, 241–244, 1989. Holmlund, P. and Jansson, P.: The Tarfala Mass Balance Programme, Geogr. Ann., 81A, 621–631, 1999. Holmlund, P. and Jansson, P.: Glaciological research at Tarfala Research Station. Stockholm University, Stockholm, 48~pp., 2002. Holmlund, P., Jansson, P., and Pettersson, R.: A re-analysis of the 58 year mass-balance record of Storglaciären, Sweden, Ann. Glaciol., 42, 389–394, 2005. Hooke, R. L., Gould, J. E., and Brzozowski, J.: Near-surface temperatures near and below the equilibrium line on polar and subpolar glaciers, Z. Gletscherkd Glazialgeol., 19(1), 1–25, 1983. Huss, M., Bauder, A., and Funk, M.: Homogenization of long-term mass balance time series, Ann. Glaciol., 50(50), 198–206, 2009. Jansson, P.: Effect of uncertainties in measured variables on the calculated mass balance of Storglaciären, Geogr. Ann., 81(4), 633–642, 1999. Jansson, P. and Pettersson, R.: Fixed points and co-ordinate systems in the Tarfala valley, Tarfala Research Station Annual Report 1995–96, 26–29, 1997. Jansson P. and Pettersson R.: Spatial and temporal characteristics of a long mass balance record, Storglaciären, Sweden, Arct., Ant. Alp. Res., 39(3), 432–437, 2007. Jones, C. B.: Geographical information systems and computer cartography, Longmann, 1997. Kappeler, S. : Längenänderungsmessungen an ausgewählten Gletschern der Schweizer Alpen unter Verwendung von GIS. Diploma thesis, Department of Geography, University of Zurich, unpublished, 80~pp., 2006. Kraus, K.: Photogrammetrie. Band 1: Geometrische Informationen aus Photographien und Laserscanneraufnahmen, Walter de Gruyter, Berlin, 7 edn., 2004. Kraus, K., Karel, W., Briese, C., and Mandlburger, G.: Local accuracy measures for digital terrain models, The Photogrammetric Record, 21(116), 342–354, 2006. Li, Z., Zhu, Q., and Gold, C.: Digital terrain modeling – principles and methodology, CRC Press, Boca Raton, Florida, 2005. Linderholm, H. W., Jansson, P., and Chen, D.: A high-resolution reconstruction of Storglaciären mass balance back to 1780/81 using tree-ring data and circulation indices, Quaternary Res., 67, 12–20, 2007. Nesje, A., Bakke, J., Dahl, S. O., Lie, O., and Matthews, J. A.: Norwegian mountain glaciers in the past, present and future, Glob. Planet. Change, 60(1–2), 10–27, 2008. Østrem, G. and Brugman, M.: Mass balance measurement techniques. A manual for field and office work, Environment Canada, Saskatoon, 1991. Østrem, G., Haakensen, N., and Melander, O.: Atlas over breer I Nordskandinavia. Glacier atlas of Northern Scandinavia, Meddelande nr 46 från Naturgeografiska Institutionen, 1973. Pettersson, R., Jansson, P., Huwald, H., and Blatter, H.: Spatial pattern and stability of the cold surface layer of Storglaciären, Sweden, J. Glaciol., 53(180), 99–109, 2007. Pettersson, R. and Jansson, P.: Quick manual for measurement and processing of kinematic GPS data, Department of Physical Geography and Quaternary Geology Stockholm University, Stockholm, 2005. Pettersson, R., Jansson, P., and Holmlund, P.: Cold surface layer thinning on Storglaciären, Sweden, observed by repeated ground penetrating radar surveys, J. Geophys. Res., 108(F1), 6004, doi:10.1029/2003JF000024, 2003. Raper, S. C. B., Briffa, K. R., and Wigley, T. M. L.: Glacier change in northern Sweden from AD 500: a simple geometric model of Storglaciären, J. Glaciol., 42, 341–351, 1996. Schneider, T. and Jansson, P.: Internal accumulation in firn and its significance for the mass balance of Storglaciären, Sweden, J. Glaciol., 50(168), 25–34, 2004. Schytt, V.: Glaciers of the Kebnekaise-Massif, Geogr. Ann., 41, 213–227, 1959. Schytt, V.: The net mass balance of Storglaciären, Kebnekaise, Sweden, related to the height of the equilibrium line and to the height of the 500 mb surface, Geogr. Ann., 63(3–4), 219–223, 1981. Temme, A. J. A. M., Schoorl, J. M., and Claessens, L.: Geostatistical simulation and error propagation in geomorphometry, in: Geomorphometry: concepts, software, applications, edited by: Hengl, P. and Reuter, H. I., chap 5, Office for Official Publications of the European Communities, Luxembourg, 93–108, 2007. Thibert, E., Blanc, R., Vincent, C., and Eckert, N.: Glaciological and volumetric mass-balance measurements: error analysis over 51 years for Glacier de Sarenne, French Alps, J. Glaciol., 54, 522–532, 2008. WGMS: Glacier mass balance bulletin no.9 (2004–2005), ICSU (FAGS)/IUGG (IACS)/UNEP/UNESCO/WMO, World Glacier Monitoring Service, University of Zurich, Zürich, 2007. Wood, J. D. and Fisher, P. F.: Assessing interpolation accuracy in elevation models, IEEE Computer Graphics and Applications, 13, 48–56, 1993. Zemp, M., Jansson, P., Holmlund, P., Gärtner-Roer, I., Koblet, T., Thee, P., and Haeberli, W.: Comparison of glaciological and volumetric mass balance measurements at Storglaciären, Sweden, The Cryosphere Discuss., 4, 381–408, 2010.