InSAR detects increase in surface subsidence caused by an Arctic tundra fire
Geophysical Research Letters
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Abstract
Wildfire is a major disturbance in the Arctic tundra and boreal forests, having a significant impact on soil hydrology, carbon cycling, and permafrost dynamics. This study explores the use of the microwave Interferometric Synthetic Aperture Radar (InSAR) technique to map and quantify ground surface subsidence caused by the Anaktuvuk River fire on the North Slope of Alaska. We detected an increase of up to 8 cm of thaw-season ground subsidence after the fire, which is due to a combination of thickened active layer and permafrost thaw subsidence. Our results illustrate the effectiveness and potential of using InSAR to quantify fire impacts on the Arctic tundra, especially in regions underlain by ice-rich permafrost. Our study also suggests that surface subsidence is a more comprehensive indicator of fire impacts on ice-rich permafrost terrain than changes in active layer thickness alone.
Suggested Citation
Liu, L., Jafarov, E.E., Schaefer, K.M., Jones, B.M., Zebker, H.A., Williams, C.A., Rogan, J., Zhang, T., 2014, InSAR detects increase in surface subsidence caused by an Arctic tundra fire: Geophysical Research Letters, v. 41, no. 11, p. 3906-3913, https://doi.org/10.1002/2014GL060533.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | InSAR detects increase in surface subsidence caused by an Arctic tundra fire |
| Series title | Geophysical Research Letters |
| DOI | 10.1002/2014GL060533 |
| Volume | 41 |
| Issue | 11 |
| Publication Date | June 02, 2014 |
| Year Published | 2014 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Alaska Science Center |
| Description | 8 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Geophysical Research Letters |
| First page | 3906 |
| Last page | 3913 |
| Country | United States |
| State | Alaska |
| Other Geospatial | Anaktuvuk River;North Slope Of Alaska |