1 / 25

Surface Currents from HF Radar in the Beaufort Sea

Surface Currents from HF Radar in the Beaufort Sea. A Presentation to the Alaska Marine Science Symposium January 25, 2006 Dave Musgrave, Hank Statscewich, Rachel Potter (UAF) Pete Lilleboe, Belinda Lipa (CODAR Ocean Sensors).

gerd
Télécharger la présentation

Surface Currents from HF Radar in the Beaufort Sea

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Surface Currents from HF Radar in the Beaufort Sea A Presentation to the Alaska Marine Science Symposium January 25, 2006 Dave Musgrave, Hank Statscewich, Rachel Potter (UAF) Pete Lilleboe, Belinda Lipa (CODAR Ocean Sensors)

  2. Sponsored by Minerals Management Service and NOAA through National Ocean Partnership Program Thanks to British Petroleum Alaska and Alaska Clean Seas

  3. Study the temporal and spatial variability of surface currents during ice-free and mixed ice/open water conditions using HF radar Beaufort Sea 101: Under open water conditions: Winds from east, westward currents Winds from west, eastward currents Under mixed ice/open water conditions: How well does HF radar work for surface currents? Can HF radar be used to detect ice floes? New technology: switchable frequencies (12 and 25 Mhz)

  4. HF radar in the Beaufort Sea

  5. Beaufort Sea HF Radar Project Data Recovery Rate: Solid Dashes represent when radial files are made, gaps occur when the system was down. Retrofit with Dual Frequency Rx Antennas APMs with Bruce SITE VISITS: Install WEST Install ENDI Trouble- shoot Repeat APMs, Remove 12 MHz Tx “Trap” Retrofit with Repaired 12 MHZ Tx “Trap” Sent switch.pl code WEST Operational = 79% 25 12 testing 25 12 MHz 12 MHz ENDI Operational = 91% 12 25 12 MHz 25 12 MHz 25 MHz 12 MHz

  6. 12 MHz 24 MHz

  7. CODAR: Mean U = - 17 cm/s Mean V = 3 cm/s STD = 23.3 cm/s Wind: Mean U = - 654 cm/s Mean V = 184 cm/s STD = 682 cm/s

  8. At a 2 hour lag Wind and Currents Correlation Amplitude = 0.8 Rotation Angle = 18 degrees CW (from wind to current)

  9. Conclusions • Easterly Winds give Westward Currents • (most of the time) • current field not uniform • Occasional on-offshore transport • Sea ice detection? need SAR

  10. THANK YOU

More Related