SPURS-2 Controlled Flux Technique (CFT) data for the E. Tropical Pacific field campaign R/V Revelle cruises

Processing Level2
Start/Stop Date2016-Aug-24 to 2017-Nov-11
Short NameSPURS2_CFT
DescriptionThe SPURS (Salinity Processes in the Upper Ocean Regional Study) project is NASA-funded oceanographic process study and associated field program that aim to elucidate key mechanisms responsible for near-surface salinity variations in the oceans. The project involves two field campaigns and a series of cruises in regions of the Atlantic and Pacific Oceans exhibiting salinity extremes. SPURS employs a suite of state-of-the-art in-situ sampling technologies that, combined with remotely sensed salinity fields from the Aquarius/SAC-D, SMAP and SMOS satellites, provide a detailed characterization of salinity structure over a continuum of spatio-temporal scales. The SPURS-2 campaign involved two month-long cruises by the R/V Revelle in August 2016 and October 2017 combined with complementary sampling on a more continuous basis over this period by the schooner Lady Amber. Focused around a central mooring located near 10N,125W, the objective of SPURS-2 was to study the dynamics of the rainfall-dominated surface ocean at the western edge of the eastern Pacific fresh pool subject to high seasonal variability and strong zonal flows associated with the North Equatorial Current and Countercurrent. The Controlled Flux Technique (CFT) is a system for measuring the net heat transfer velocity and turbulent kinetic energy (TKE) dissipation at the ocean surface, and is a useful tool for studying the turbulence generated at the ocean surface by the impact of raindrops. CFT was employed during both SPURS-2 Revelle cruises. It involves a laser heating a small patch of water on the ocean surface, and an infrared imaging camera then tracking the resulting thermal decay. This decay is known to be proportional to the dissipation of TKE at the water surface, which in turn can be used to scale the transfer velocity for the net heat flux. SPURS2 CFT data take the form of a series of .raw video files each with corresponding .met text header files containing the associated file metadata. The CFT data was recorded at 15 frames per second (fps) during the first Revelle cruise in 2016, and at 25 fps during the second in 2017. Matlab CFT reader software are provided by UW/APL and distributed here with the CFT data files.
R/V Revelle
Name: R/V Roger Revelle (SIO) (R/V Revelle)
Orbit Period: 0.0 minutes
Inclination Angle: 0.0 degrees
Name: Heitronics Wing IR Pyrometer (PYROMETERS)
Swath Width: 0.001 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectNASA Salinity Processes in the Upper Ocean Regional Study (SPURS)
Data ProviderPublisher: SPURS Data Management PI, Fred Bingham
Creator: W. Asher
Release Place: Applied Physics Laboratory, University of Washington, 1013 NE 40th St, Seattle, WA 98105
Release Date: 2019-Jul-31
Resource: http://podaac.jpl.nasa.gov/SPURS

Keyword(s)CFT, Controlled Flux Technique, laser, turbulent kinetic energy, turbulence, infrared, video, Upper Ocean, SPURS2, Eastern Tropical Pacific, ITCZ region, Cruises, Revelle, insitu, SPURS, oceanographic campaign
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Spatial Resolution: 1 Meters x 1 Meters
North Bounding Coordinate: 21.26 degrees
South Bounding Coordinate: 5.06 degrees
West Bounding Coordinate: -157.88 degrees
East Bounding Coordinate: -118.32 degrees
Time Span: 2016-Aug-24 to 2017-Nov-11
Granule Time Span: 2016-Aug-24 to 2017-Nov-11
Projection Type: WGS84
Ellipsoid: WGS 84
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
Citation W. Asher. 2019. SPURS Field Campaign Rawinsonde Products. Ver. 1.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/SPUR2-CFT00

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For more information see Data Citations and Acknowledgments.

Journal Reference Asher, W.E., Kyla Drushka, A.T. Jessup, E.J. Thompson, and D. Clark. 2019. Estimating rain-generated turbulence at the ocean surface using the active controlled flux technique. Oceanography 32(2):108-115, https://doi.org/10.5670/oceanog.2019.218.