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Published January 1, 2008 | Published
Journal Article Open

Monitoring Earth Surface Dynamics With Optical Imagery

Abstract

The increasing availability of high-quality optical satellite images should allow, in principle, continuous monitoring of Earth's surface changes due to geologic processes, climate change, or anthropic activity. For instance, sequential optical images have been used to measure displacements at Earth's surface due to coseismic ground deformation [e.g., Van Puymbroeck et al., 2000], ice flow [Scambos et al., 1992; Berthier et al., 2005], sand dune migration [Crippen, 1992], and landslides [Kääb, 2002; Delacourt et al., 2004]. Surface changes related to agriculture, deforestation, urbanization, and erosion—which do not involve ground displacement—might also be monitored, provided that the images can be registered with sufficient accuracy. Although the approach is simple in principle, its use is still limited, mainly because of geometric distortion of the images induced by the imaging system, biased correlation techniques, and implementation difficulties.

Additional Information

© 2008 American Geophysical Union. Published 1 January 2008. This work was supported by U.S. National Science Foundation grants EAR 0409652 and EAR 0636097 to Jean-Philippe Avouac and by the Gordon and Betty Moore Foundation. This is Caltech Tectonic Observatory Contribution 74. The Mer de Glace and Barcelonette SPOT 5 images were acquired thanks to the Incitation à l'Utilisation Scientifique des Images SPOT (ISIS) program. SPOT 5 images copyright Centre National d'Etudes Spatiales.

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August 19, 2023
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