Airborne Remote Sensing of the Upper Ocean Turbulence during CASPER-East
Author
Savelyev, Ivan
Miller, William David
Sletten, Mark
Smith, Geoffrey B.
Savidge, Dana K.
Frick, Glendon
Menk, Steven
Moore, Trent
de Paolo, Tony
Terrill, Eric J.
Wang, Qing
Shearman, Robert Kipp
Date
2018Metadata
Show full item recordAbstract
This study takes on the challenge of resolving upper ocean surface currents with a suite
of airborne remote sensing methodologies, simultaneously imaging the ocean surface in visible,
infrared, and microwave bands. A series of flights were conducted over an air-sea interaction supersite
established 63 km offshore by a large multi-platform CASPER-East experiment. The supersite was
equipped with a range of in situ instruments resolving air-sea interface and underwater properties,
of which a bottom-mounted acoustic Doppler current profiler was used extensively in this paper for
the purposes of airborne current retrieval validation and interpretation. A series of water-tracing dye
releases took place in coordination with aircraft overpasses, enabling dye plume velocimetry over
100 m to 10 km spatial scales. Similar scales were resolved by a Multichannel Synthetic Aperture
Radar, which resolved a swath of instantaneous surface velocities (wave and current) with 10 m
resolution and 5 cm/s accuracy. Details of the skin temperature variability imprinted by the upper
ocean turbulence were revealed in 1–14,000 m range of spatial scales by a mid-wave infrared camera.
Combined, these methodologies provide a unique insight into the complex spatial structure of
the upper ocean turbulence on a previously under-resolved range of spatial scales from meters to
kilometers. However, much attention in this paper is dedicated to quantifying and understanding
uncertainties and ambiguities associated with these remote sensing methodologies, especially
regarding the smallest resolvable turbulent scales and to reference depths of retrieved currents.
Description
The article of record as published may be found at http://dx.doi.org/10.3390/rs10081224
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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