The Langmuir Cell Dri dataset Taken March/April 2017

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Presentation transcript:

The Langmuir Cell Dri dataset Taken March/April 2017 Presented to SOMaR-4 Fourth Workshop on Sensing the Ocean with Marine Radars 9-11 May, 2017, Lüneburg, Germany Tony de Paolo Dr. Eric Terrill Scripps Institution of Oceanography

From the proposal….. Langmuir cells are one of many physical processes at the air-sea interface that couple the ocean-atmosphere system, and are responsible for extending the influence of the air-sea interface to depth. Langmuir cells vary significantly in time and space, and traditional means to sample them have been cumbersome, resulting in data sets that don’t span wide ranges of conditions. In particular, situations when the winds and waves aren’t aligned, and in conditions of varying stratification.

Sampling plan 3 X-Band Radars 2 Liquid Robotics Waveglider SV3s Furuno/WaMoS II (FLIP) Sperry/Rutter/WaMoS II (Sally Ride) Kelvin Hughes (Sally Ride) 2 Liquid Robotics Waveglider SV3s 3 Hydroid Remus AUVs Moored Datawell buoy (with SIO mini wave buoy TopHat) 4 drifting SIO mini wave buoys Ken Melville’s Group (SIO) Jerry Smith’s Group (SIO)

WaMoS Tower X-Band Radars Kelvin Hughes Tower Rutter

Autonomous Vehicles

Wave Buoys

Winds

Wave Buoy Data

Wave buoy Data Daily counter clockwise circulation patterns. Strong diurnal currents

Sally Ride Rutter/Wamos Langmuir Cells in Radar image Sally Ride Rutter/Wamos Langmuir Cells in Radar image One minute average

Sally Ride Rutter Wamos wave inversion in Wave Glider box

Sally Ride Kelvin Hughes Scan 1800UTC March 23, 2017 Wind 25kts from 300 degrees Average backscatter magnitude Frequency 2 only 10 km backscatter range Image goes to 24 km

Sally Ride Rutter/WaMoS 5m range resolution 6 km total range

FLIP Furuno/WaMoS 3m range sampling - 3km total range Wake signature and Langmuir cell

Typical Radar layout

Look for the results next SOMar meeting!