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Proceedings Paper

Probing the subsurface ocean processes using ocean LIDARS
Author(s): Robert Arnone; Sergio Derada; Sherwin Ladner; Charles Trees
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Paper Abstract

Subsurface profiling LIDAR systems extend our understanding of ocean processes "below" the ocean surface of SST and ocean color. Time-gated LIDAR backscattering intensity has been shown to define the bio-optical ocean layers and characterize subsurface processes. The interaction between the mixed layer depth (MLD) using vertical temperature structures and LIDAR optical layers provides a critical link between physical and bio-optical processes. We evaluated the capability of LIDAR penetration to reach the MLD on a global basis. Penetration depths of LIDAR were estimated using attenuation depths derived from global monthly ocean color averages which were assumed vertically homogenous. Climatology of LIDAR penetration depth was combined with the monthly mixed layer depth determined from the Global NCOM ocean circulation model. Global NCOM output was used to construct monthly averaged MLD climatologies from 2002 to 2010. Results show how monthly changes in MLD and LIDAR penetration depths are coupled for different regions of the global ocean. For example, the time-lag in LIDAR penetration depths is linked to shallowing of the MLD in the North Atlantic Bloom. We estimate the percentage of global ocean waters where different LIDAR system configurations can reach below the MLD. Results illustrate the potential performance of LIDAR systems to "probe" the subsurface for global waters which help in LIDAR design. Subsurface processes such as mixing and biological growth and decay have significant impact on what we observe at the ocean surface. LIDAR profiling should provide the new dimension for monitoring global ocean processes.

Paper Details

Date Published: 12 June 2012
PDF: 7 pages
Proc. SPIE 8372, Ocean Sensing and Monitoring IV, 83720O (12 June 2012); doi: 10.1117/12.921103
Show Author Affiliations
Robert Arnone, U.S. Naval Research Lab. (United States)
Stennis Space Ctr. (United States)
Sergio Derada, U.S. Naval Research Lab. (United States)
Stennis Space Ctr. (United States)
Sherwin Ladner, U.S. Naval Research Lab. (United States)
Stennis Space Ctr. (United States)
Charles Trees, NATO Undersea Research Ctr. (Italy)

Published in SPIE Proceedings Vol. 8372:
Ocean Sensing and Monitoring IV
Weilin Will Hou; Robert Arnone, Editor(s)

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