Proposed Capabilities

• ASIS– Pulse-Coherent Sonars (RaDyO/SO GasEx)– Bubble-Size Distribution (Duck)

• Ship-Based– WaMoS II (SO GasEx)– Scanning LIDAR (RaDyO)– Visible/Infrared Imaging (RaDyO/SO GasEx)

T/S Drifter with TKE Dissipation Rate• 5 Pulse-coherent Doppler sonars

• The sonar system has two beams, each of which measure velocity along the beam over 1 m at 2 cm resolution. The system is vaned into the current and takes data at 4 Hz rate at near 100% duty cycle.

• Depth profile of TKE dissipation rate

• Successful Deployments• Southern Ocean GasEx 2008• RaDyO SBC 2008 and RaDyO Hawaii 2009• Stratus 9 (2008-2010) as part of VOCALS-Rex• Lucky Strike 2010

35

32

55

18 ASKolmogorov Spectra

The turbulent dissipation rate is estimated from the direct wavenumber spectra in the Kolmogorov inertial dissipation range.

Proposed Capabilities

• ASIS– Pulse-Coherent Sonars (RaDyO/SO GasEx)– Bubble-Size Distribution (Duck)

• Ship-Based– WaMoS II (SO GasEx)– Scanning LIDAR (RaDyO)– Visible/Infrared Imaging (RaDyO/SO GasEx)

WaMoS II ® Wave Monitoring System

Hs= 4.3 m Tp = 10.8 s Dp = 355° Lp = 183 m

Radar backscatter Sea surface elevation

2D Directional Spectrum

Some Important Products:• Surface Elevation Maps• 2D wave number direction spectrum• 2D frequency direction spectrum• Significant wave height• Mean, 1st peak, and 2nd peak for the

wind sea and swell of the following• Wavelength• Period• Direction

WaMoS II& Video

Riegl Laser Altimeter

TSKA Microwave Wave Height

SO GasEx WavesWind Speed, Wave Spectra & Significant Wave Height

The WaMoS® II capabilities on the Research Vessel will provide directional wave spectra and individual wave state components at wavelengths of O(15 to 600)m that overlap with the Riegl Q240i scanning Lidar for a continuous wavenumber spectra that spans wavelengths from O(0.05 to 600)m. Wave measurements will be performed from the met platform at the end of the boom that extends out 3 m over the ocean. The Riegl Q240i scanner will be deployed at the end of the boom for the surface wave and wave roughness measurement.

SO GasEx WavesWind Speed, Wave Frequency, Wave Age & Significant Wave Height

Proposed Capabilities

• ASIS– Pulse-Coherent Sonars (RaDyO/SO GasEx)– Bubble-Size Distribution (Duck)

• Ship-Based– WaMoS II (SO GasEx)– Scanning LIDAR (RaDyO)– Visible/Infrared Imaging (RaDyO/SO GasEx)

RaDyO Flip Instrumentation SetupScanning Altimeters

Infrared Camera

Air-Sea Flux Package

Polarimeter

Visible Camera

RaDyO Waves from Point and Scanning LIDARWave Height and Topography

RaDyO Waves from Point and Scanning LIDARWind Speed, Wave Spectra & Significant Wave Height

The WaMoS® II capabilities on the Research Vessel will provide directional wave spectra and individual wave state components at wavelengths of O(15 to 600)m that overlap with the Riegl Q240i scanning Lidar for a continuous wavenumber spectra that spans wavelengths from O(0.05 to 600)m. Wave measurements will be performed from the met platform at the end of the boom that extends out 3 m over the ocean. The Riegl Q240i scanner will be deployed at the end of the boom for the surface wave and wave roughness measurement.

Proposed Capabilities

• ASIS– Pulse-Coherent Sonars (RaDyO/SO GasEx)– Bubble-Size Distribution (Duck)

• Ship-Based– WaMoS II (SO GasEx)– Scanning LIDAR (RaDyO)– Visible/Infrared Imaging (RaDyO/SO GasEx)

RaDyO Flip Instrumentation SetupScanning Altimeters

Infrared Camera

Air-Sea Flux Package

Polarimeter

Visible Camera

Microbreaking IR and POL Movie

Polarimeter IR Camera

Sea Surface Roughness Imaging Capability

Targeting the small-scale wave roughness features and interact with optical observations and modelers.

Breaking Crest Length Distribution using Infrared Imagery

Small-scale wave roughness in Santa Barbara Channel was important to the Breaking Distribution

Small-scale wave roughness in Santa Barbara Channel was important to the Breaking Distribution. This bimodality may result from the difference the relaxation of the young and established seas in this rapidly changing wind field. Its possibly linked to the relaxing longer seas are sufficiently nonlinear for breaking to persist. b may vary with wind speed or MSWB becomes less dominant with increasing wind speed?

Additional Capabilities

• ASIS– Pulse-Coherent Sonars (RaDyO/SO GasEx)– Bubble-Size Distribution (Duck)

• Ship-Based– WaMoS II (SO GasEx)– Scanning LIDAR (RaDyO)– Visible/Infrared Imaging (RaDyO/SO GasEx)– Polarimetric Imaging (RaDyO)

• Measures the polarization state of a bundle of light rays– Stokes parameters S = (S0, S1, S2, S3)

– Each CCD camera measures a unique linear combination of the polarization state.

– Mueller Calculus SOUT = M( ) SIN

Polarimetry

Amount of circular polarization

Orientation and degree of linear polarization

Intensity

Incident Light

Geometry and Material Properties of the Scattering Object

Scattered Light

n̂

Zappa, C. J., M. L. Banner, H. Schultz, A. Corrada-Emmanuel, L. B. Wolff, and J. Yalcin (2008), Retrieval of short ocean wave slope using polarimetric imaging, Measurement Science and Technology, 19(055503), doi:10.1088/0957-0233/1019/1085/055503.a

Polarimetric Slope Sensing (PSS)

PSS uses the change in polarization from scattering, reflection or refraction to infer the orientation of the interface. For negligible upwelling and for an unpolarized sky, the Degree of Linear Polarization is defined by

where

The Polarization Orientation is not affected by upwelling and is given by

Stoke’s Vector

The geometric relationship between the surface normal, incidence angle relative to the surface facet () and polarization orientation ().

SKYAM SRSSSSS ),,,( 3210

20

22

21,S

SSnDOLP

nn

nnnDOLP

,,,,

,

90

)(tan21

1

21

SS

or

Polarimeter Slope Topography

Y- and X-component surface slope arrays computed from polarimetric images taken with the polarimeter during the RaDyO experiment in the Santa Barbara Channel from R/P Flip Sept. 2008. The scale shows the relationship between slope and grayscale.

Image scale is 1 m by 1 m. U10 = 9.2 m s-1

Wave Height from Polarimeter Topography

Image scale is 1 m by 1 m. U10 = 9.2 m s-1

Polarimeter Comparison with Scanning Lidar

Investigation the source of the deviation is ongoing. Several factors could be responsible, including: Sky Polarization

Wavenumber-Frequency Slope Spectra from Polarimeter

Ring Waves from Rain Drops

Slope in Degrees