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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