Outlet glaciers—which serve to drain ice from ice sheets—seem to be dynamically less stable in North Greenland than in South Greenland1,2,3. Storstrømmen, a large outlet glacier in northeastern Greenland which surged between 1978 and 1984 (ref. 2), has been well studied. In general, neither glacier surge mechanisms nor the geographical distribution of the surges are well known. Conventional satellite radar interferometry can provide large-scale topography models with high resolution4, and can measure the radar line-of-sight component of ice-flow vectors5, but cannot map full vector flow fields. Here we present an interferometry method that combines observations from descending and ascending satellite orbits which, assuming ice flow parallel to the topographic surface, allows us to use the differing view angles to estimate full three-dimensional surface flow patterns. The accuracy of our technique is confirmed by the good agreement between our radar-based flow model and in situ Global Positioning System (GPS) reference data at Storstrømmen. Radar measurements such as these, made regularly and at high spatial density, have the potential to substantially enhance our understanding of glacier dynamics and ice-sheet flow, as well as improve the accuracy of glacier mass-balance estimates.
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Mock, S. J. Fluctuation of the terminus of the Harald Moltke Brae, Greenland. J. Glaciol. 6, 369–373 (1966).
Reeh, N., Bøggild, C. E. & Oerter, H. Surge of Storstrømmen, a large outlet glacier from the Inland Ice of North-East Greenland. Rapp. Grønlands. Geol. Unders. 162, 201–209 (1994).
Joughin, I., Tulaczyk, S., Fahnestock, M. & Kwok, R. Amini-surge on the Ryder Glacier, Greenland, observed by satellite radar interferometry. Science 274, 228–230 (1996).
Goldstein, R. M., Zebker, H. A. & Werner, C. L. Satellite radar interferometry: Two-dimensional phase unwrapping. Radio Sci. 23, 713–720 (1988).
Goldstein, R. M., Engelhardt, H., Kamb, B. & Frolich, R. M. Satellite radar interferometry for monitoring ice sheet motion: Application to an Antarctic ice stream. Science 262, 1525–1530 (1993).
Koch, J. P. & Wegener, A. Die Glaziologischen Beobachtungen der Danmark-Expedition. Meddr. Grønland 46, 1–77 (1911).
Oerter, H., Bøggild, C. E., Jung-Rothenhäusler, F. & Reeh, N. in Climate and Sea Level Change and the Implications for Europe Appendix A, 2–6 (Final Rep., Contract EV5V-CT91-0051, Commission of the European Communities DGXII, Brussels, (1995)).
Reeh, N., Bøggild, C. E., Jung-Rothenhäusler, F. & Oerter, H. in Climate and Sea Level Change and the Implications for Europe Appendix D, 2–17 (Final Rep., Contract EV5V-CT91-0051, Commission of the European Communities, DGXII, Brussels, (1995)).
Massonnet, D. et al. The displacement field of the Landers earthquake mapped by radar interferometry. Nature 364, 138–142 (1993).
Rignot, E., Jezek, K. C. & Sohn, H. G. Ice flow dynamics of the Greenland ice-sheet from SAR interferometry. Geophys. Res. Lett. 22, 575–578 (1995).
Joughin, I. R., Winebrenner, D. P. & Fahnestock, M. A. Observations of ice-sheet motion in Greenland using satelite radar interferometry. Geophys. Res. Lett. 22, 571–574 (1995).
Kwok, R. & Fahnestock, M. A. Ice sheet motion and topography from radar interferometry. IEEE Trans. Geosci. Remote Sensing 34, 189–200 (1996).
Joughin, I., Winebrenner, D., Fahnestock, M., Kwok, R. & Krabill, W. Measurement of ice-sheet topography using satellite-radar interferometry. J. Glaciol. 42, 10–22 (1996).
Joughlin, I., Kwok, R. & Fahnestock, M. Estimation of ice-sheet motion using satellite radar interferometry: Method and error analysis with application to Humboldt Glacier, Greenland. J. Glaciol. 42, 564–575 (1996).
Rignot, E. Tidal motion, ice velocity and melt rate of Petermann Gletscher, Greenland, measured from radar interferometry. J. Glaciol. 42, 476–485 (1996).
Massman, F. H., Neymayer, J. C., Raimondo, K., Enninghorst & Li, H. Quality of the D-PAF orbits before and after the inclusion of PRARE data.in Proc. 3rd ERS Symp. Vol. 3, 1655–1660 (SP-414, ESA, Noordwijk, (1998)).
Joughin, I., Kwok, R. & Fahnestock, M. Interferometric estimation of three-dimensional ice-flow using ascending and descending Passes. IEEE Trans. Geosci. Remote Sensing(in the press).
Bøggild, C. E., Jung-Rothenhäusler, F. & Oerter, H. Glaciological investigations on Storstrømmen glacier, North-East Greenland. Express Report, Grønlands. Geol. Unders. 163–170 (Geol. Survey of Denmark and Greenland, Copenhagen, (1995).
The Danish Center for Remote Sensing is funded by the Danish National Research Foundation. ERS data have been made available by the European Space Agency. Field work on Storstrømmen was supported by the Commission of the European Communities.
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