Abstract
Groups from several countries are studying Greenland glaciers in connection with the 'greenhouse effect' (Braithwaite et al., 1992a). In particular, GGU is the Danish partner in a IO-nation two-year project (March 1991 to February 1993) on causes and effects of sea level changes which is funded by the European Community through the European Programme on Climatology and Natural Hazards (EPOCH). As its contribution to EPOCH, GGU is studying the effects of meltwater refreezing in the lower accumulation area of the Greenland ice sheet which may reduce, or at least delay, the expected sea level rise under warmer climate. Work done under EPOCH in 1991 was described by Braithwaite et al. (1992b) while the present note describes the most important results of the 1992 field work.
Highlights
GGU is the Danish partner in a IO-nation two-year project (March 1991 to February 1993) on causes and effects of sea level changes which is funded by the European Community through the European Programme on Climatology and Natural Hazards (EPOCH)
As its contribution to EPOCH, GGU is studying the effects of meltwater refreezing in the lower accumulation area of the Greenland ice sheet which may reduce, or at least delay, the expected sea level rise under warmer climate
The field area is above Paakitsoq, about 80-120 km east of IlulissatlJakobshavn (Fig. l), where GGU has measured mass-balance in the ablation area since 1982 (Thomsen et al, 1989)
Summary
The field area is above Paakitsoq (formerly spelt Påkitsoq), about 80-120 km east of IlulissatlJakobshavn (Fig. l), where GGU has measured mass-balance in the ablation area since 1982 (Thomsen et al, 1989). Are the difficulties of getting weather information from the area, and the hazard of flying over snow-covered surfaces when there is overcast sky These problems were solved in 1992 by a combination of helicopter transport to and from the field area and man-hauling within the area. Measurements have been made in the ablation area with great success over the last 10 years by flying each day by helicopter from Ilulissat (Thomsen et al, 1989) This so-called 'flying squad' approach is inappropriate for measurements in the lower accumulation area because of the greater distances and elevations involved, the extra weight of equipment needed and the time-consuming nature of the measurements, e.g. a detailed density profile at a single site down to 10 metres depth needs a very long day's work.
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