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Surface expressions of subsurface processes at the Mouth of the Columbia River – AUV observations

Surface expressions of subsurface processes at the Mouth of the Columbia River – AUV observations by Craig McNeil and Andrey Shcherbina

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Surface expressions of subsurface processes at the Mouth of the Columbia River – AUV observations

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  1. Surface expressions of subsurface processes at the Mouth of the Columbia River – AUV observations by Craig McNeil and Andrey Shcherbina Acknowledgements: Andy Jessup and the APL RIVET team, APL AUV team (Trina Litchenforf and Nick Michel-Hart), CMOP collaborators, Guy Gelfenbaum (transponders on his tripods)

  2. REMUS 100 Acoustic backscatter • 1.2 Mhz • Sensors: • SBE 49 ‘FastCAT’ CTD, up/down ADCP • Wetlab ECO Triplets: optical and • acoustic backscatter turbidity Optical backscatter • em700 nm and 880 nm

  3. SUMMARY All way to surface

  4. Outbound Bottom following test

  5. Outbound Not all way to surface!

  6. Outbound

  7. Outbound Focus data set because of near surface expression

  8. Inbound

  9. Outbound - zigzag Zig-zag path across channel, like swath data so should really visualize in 3D

  10. Initial focus was on M78 on 03-June-2013 Outbound : 12:30 -> 15:00 h Inbound : 15:00 -> 19:00 h Ebb Flood

  11. Outbound Inbound Strong mixing Buildup fresh water Hydraulic jump? salinity Intrusion, shear driven (recirculation?) temperature

  12. Outbound Inbound flood ebb eastward current northward current

  13. Outbound Inbound chlorophyll CDOM

  14. Outbound Inbound OBS ABS

  15. OUTBOUND HIGHLIGHTS Chris Chickadel’s IR image Ebb T

  16. INBOUND HIGHLIGHTS 15:00 -> 19:00 h Intrusion, shear driven (recirculation?) Flood

  17. M76 on 31-May-2013 Outbound : 10:59 -> 13:39 h Ebb

  18. Outbound salinity temperature

  19. Outbound ebb eastward current northward current

  20. Outbound chlorophyll CDOM

  21. Outbound OBS ABS

  22. M79 on 04-June-2013 one way outbound during 15:00 -> 19:30h Ebb

  23. Needs 3D view Front? salt wedge

  24. Other stuff

  25. Non RIVET data: still to look at this

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