1. Airborne Measurements of the Columbia River Plume Andy Jessup and Bill Plant APL-UW Determine Plume Location/Characteristics –SST –Water Type/Sediment Load –Waves (dir. spectra), roughness features Identify features of interest (fronts, IW)

2. Airborne Sensors Infrared –Surface Temperature –Interpolated maps from calibrated radiometer –High resolution imagery (FY08) Microwave –Surface Velocity / Current –Surface Roughness / Waves Ocean Color / Hyperspectral (FY08) –Water type / Sediment load –Hyperspectral radiometer –Color Video Camera using RGB separation

3. Infrared Imagery and SST Maps 30 km x 30 km, 5 km spacing 2-3 hours flight time O(100 m)

4. Seasonal Location of Plume Traditional View [Hickey et al., 2005] Surface Salinity

5. 40 km x 40 km Survey Area [Hickey et al., 2005]

6. Aerial Photographs

7. Surface Wave Breaking Due to Internal Waves along Plume Front [Nash & Moum, OSU web site]

8. Conclusion Practical daily survey area –40 km x 40 km –4-6 hours Plume has local and regional effect –Local scale: roughly 40 km x 40 km –Regional 50 km offshore, 100 km along shore Coordinated daily aircraft survey –Map plume characteristics –Identify features of interest