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First observations of sea ice flexural–gravity waves with ground-based radar interferometry in Utqiaġvik, Alaska.
- Source :
-
Cryosphere . Apr2023, Vol. 17 Issue 4, p1609-1622. 14p. - Publication Year :
- 2023
-
Abstract
- We investigate the application of ground-based radar interferometry for measuring flexural–gravity waves in sea ice. We deployed a GAMMA Portable Radar Interferometer (GPRI) on top of a grounded iceberg surrounded by landfast sea ice near Utqiaġvik, Alaska. The GPRI collected 238 acquisitions in stare mode during a period of moderate lateral ice motion during 23–24 April 2021. Individual 30 s interferograms exhibit ∼ 20–50 s periodic motion indicative of propagating infragravity waves with ∼ 1 mm amplitudes. Results include examples of onshore wave propagation at the speed predicted by the water depth and a possible edge wave along an ice discontinuity. Findings are supported through comparison with on-ice Ice Wave Rider (IWR) accelerometers and modeled wave propagation. These results suggest that the GPRI can be a valuable tool to track wave propagation through sea ice and possibly detect changes in such properties across variable ice conditions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19940416
- Volume :
- 17
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Cryosphere
- Publication Type :
- Academic Journal
- Accession number :
- 163724738
- Full Text :
- https://doi.org/10.5194/tc-17-1609-2023