| Title | Atmospheric Vortex Streets on a RADARSAT SAR Image |
| Download | Downloads
(Preprint) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Li, X; Clemente-Colon, P; Pichel, W; Vachon, P W |
| Source | as submitted to Geophysical Research Letters; 2000., https://doi.org/10.4095/219638  Open Access |
| Year | 2000 |
| Alt Series | Earth Sciences Sector, Contribution Series 20042836 |
| Document | book |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Released | 2000 01 01 |
| Abstract | We analyze the sea surface imprint of two atmospheric vortex streets (AVS's) observed on a RADARSAT, a Canadian earth observation satellite, Synthetic Aperture Radar (SAR) image of the Aleutian Islands
in the western Gulf of Alaska acquired on May 5, 1999. The RADARSAT SAR instrument is operated in C-band with HH polarization. These AVS's are interpreted as the atmosphere analog of classic Von K!rm!n vortex streets. The SAR image, along with
radiosonde data and surface weather charts, reveal that the AVS lengths are 196 km and 111 km for AVS-1 and AVS-2, respectively. There are five and two pairs of vortices within each AVS. The vortex shedding period is estimated to be between 35 and 48
minutes. The vortex shedding started approximately 4.6 and 2.6 hours prior to the SAR imaging time for AVS-1 and AVS-2, respectively. There are seven and three pairs of vortices within the respective AVS's. The vortex tangential velocity is estimated
to be between 1.7 and 2.3 m/s and the energy dissipated during the vortex lifetime is estimated to be between 24.9 and 23.6 J/m 3 . |
| GEOSCAN ID | 219638 |
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