Fróðskaparrit - 01.01.1998, Page 325

Fróðskaparrit - 01.01.1998, Page 325
VEÐURLAGSELVDAR JØKULBROYTINGAR í TJÚGUNDU ØLD Á SUÐURLANDINUM í ÍSLANDI 331 (7-9 years), the scale of transgressive ice- front movement is of a lower order than that of regression. These observations can be supported by evidence from a nearby valley glacier and are in general agreement with similar twentieth century studies (Rogstad, 1951; Nesje, 1989; Nesje et al., 1995), making these fmdings of statistical signifi- cance. Acknowledgements This paper is based on fieldwork carried out whilst on the Liverpool University Iceland Expedition 1996. I would like to thank Chris Hunt and Dr. Geoff Thomas for organising the expedition. I am also indebted to Dr. Andrew Dugmore and Professor David Sugden for com- ments and advice on the manuscript. References Anderson, J.L. and Sollid, J.L. 1971. Glacial chronolo- gy and glacial geomorphology in the marginal zones of the glaciers Mitdalsbreen and Nigardsbreen, south Norway. Norsk Geografisk Tidsskrift, 25: 1- 38. Benedict, J.B. 1967. Recent glacial history of an alpine area in the Colorado Front Range, USA. I: Estab- lishing a new lichen-growth curve. Journal of Glaciology, 6: 817-832. Beschel, R. 1950. Flechten als Alstermasstab rezenter Flachten. Zeitschrift fur Gletscherkunde und Gla- zialgeologie, 1: 303-309. Beschel, R. 1961. Dating rock surfaces by lichen growth and its application to glaciology and physiography (lichenometry). In: G.O. Raasch (ed.) Geology ofthe Arctic, vol.2: 1044-1062. Bickerton, R.W. and Matthews, J.A. 1993. ‘Little Ice Age’ variations of outlet glaciers from the Jostedals- breen ice-cap, southern Norway: a regional licheno- metric-dating study of ice marginal moraine se- quences and their climatic significance. Journal of Quatemary Science, 8: 45-80. Bjorck, S., Rundgren, M., Ingolfsson, O., and Funder, S. 1997. The Preboreal oscillation around the Nordic Seas: terrestrial and lacustrine responses. Journal of Quatemary Science, 12 (6): 455-465. Bjornsson, H. 1971. Baegisarjokull, North Iceland. Re- sults of glaciological investigations 1967-1968: Part I. Mass balance and general meteorology. Jdkull, 21: 1-26. Bjomsson, H. 1979. Glaciers in Iceland. Jokull, 29: 74- 80. Boyle, E.A. and Keigwin, L.D. 1987. North Atlantic thermohaline circulation during the past 20,000 years linked to high latitude surface temperatures. Nature, 330: 35-40. Broecker, W.S., Andree, M., Wolfli, M., Oeschger, H., Bonani, G., Kennett, J., and Peteet, D. 1988. The chronology of the last deglaciation: implications to the cause of the Younger Dryas event. Paleoceano- graphy, 3: 1-19. Burrows, C.J. and Orwin, J. 1971. Studies on some glacial moraines in New Zealand. 1.- The establish- ment of lichen growth curves in the Mount Cook area. New Zealand Journal ofScience, 14: 327-335. Calkin, P.E. and Ellis, J.M. 1980. A lichenometric dat- ing curve and its applications to Holocene glacier studies in the Central Brooks Range, Alaska. Arctic and Alpine Research, 12:245-264. Caseldine, C.J. 1991. Lichenometric dating, lichen population studies and Holocene glacial history in Trollaskagi, northern Iceland. In: Maizels, J.K. and Caseldine, C.J. (eds.). Environmental change in lce- land: past and present. Dordrecht: 219-233. Eythorsson, J. 1935. On the variation of glaciers in Ice- land: some studies made in 1931. Geografiska An- naler, 17: 121-137. Eythorsson, J. 1963. Variations of Icelandic Glaciers, 1931-1960. Jokull, 13: 31-33. Eythorsson, J. 1964,1965,1966. Jðklabreytingar. Jokull, 14,15,16. Eythorsson, J. and Sigtryggsson, H. 1971. The Zoology oflceland, Reykjavik. Finsterwalder, S. and Schunck, H. 1887. Der Sulden- femer. Zeitschrift des Deutschen und Oesterreich- ischen Alpenvereins, 18: 72-89. Gordon, J.E. 1981. Glacier margin fluctuations during the 19th and 20th centuries in the Ikamiut Kangerdlu- arssuat area, west Greenland. Arctic andAlpine Re- search, 13, 1: 47-62. Gordon, J.E. and Sharp, M. 1983. Lichenometry in dat- ing recent glacial landforms and deposits, southeast Iceland. Boreas, 12: 191-200. Grove, J.M. 1988. The Little lceAge. London: Methuen. Gmdd, H. 1990. Small glaciers as sensitive indicators of climatic fluctuations. Geograflska Annaler, 72A, 1: 119-123. Hald, M. and Aspeli, R. 1997. Rapid climatic shifts of
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