mass balance assessment remains difficult as most of the 
historical images do not cover entire glacier basins. 
7. CONCLUSION 
In this paper it has been demonstrated that surface matching is 
able to support and improve glacier elevation change 
measurements derived from multi-temporal, multi-resolution 
and multi-scale datasets. DEMs from archival aerial stereo- 
imagery from the 1960s were successfully extracted and co- 
registered to modern stereo-imagery and ASTER satellite data 
for sites within the Antarctic Peninsula. It was shown that the 
applied surface matching approach is particularly useful in 
studies without sufficient ground control or missing metadata. 
General surface lowering at the glacier fronts of up to 50 m over 
the last ^4 decades was observed. Given the extensive archives 
of historical aerial imagery which are yet to be explored, this 
work has the potential fill the gap of long-term glacier mass 
balance records for the Antarctic Peninsula. 
ACKNOWLEDGEMENT 
The authors would like to thank USGS for providing the 
ASTER data and camera calibration information for the 
historical imagery. This work was sponsored by British 
Geological Survey (BGS) and Natural Environment Research 
Council (NERC). ; 
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