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Applications of Lidar Systems for Ocean Ecosystem Research
Poster Title: Applications of Lidar Systems for Ocean Ecosystem Research
Submitted on 15 Jun 2015
Author(s): Chris Hostetler1, Johnathan Hair1, Yongxiang Hu1, Michael Behrenfeld2, Carolyn Butler3, Amy Jo Scarino3, Kathleen Powell1, Ivona Cetinic4, David Siegel5, and Emmanuel Boss6
Affiliations: 1NASA Langley Research Center, Hampton, VA, USA , 2Oregon State University, Corvallis, Oregon, USA , 3Science Systems and Applications, Inc., Hampton, VA, 4Universities Space Research Association, Greenbelt, MD, 5University of California, Santa Barbara Santa Barbara, CA, 6University of Maine, Orono, ME
This poster was presented at International Ocean Colour Science Meeting
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Poster Information
Abstract: Global estimates of phytoplankton biomass (Cphyto) and particulate organic carbon (POC) have traditionally been made using passive ocean color measurements. Recently, data from the CALIOP sensor on the CALIPSO satellite have provided the first measurements of these two key carbon cycle stocks from a space-based lidar. CALIOP was not designed for subsurface ocean retrievals. Nevertheless, global distributions of surface layer Cphyto and POC retrieved with CALIOP compare well with independent assessments using MODIS passive ocean color data. This success suggests a potentially important future role for space lidar measurements in global ocean plankton research, particularly for a lidar system optimized for water column profiling. To this end, the NASA Langley airborne High Spectral Resolution Lidar (HSRL) was recently modified for ocean research to increase vertical resolution and to provide independent vertically-resolved retrievals of the diffuse attenuation coefficient (Kd) and particulate backscatter (bbp). The advanced airborne HSRL was deployed in July-August of 2014 on the Ship-Aircraft Bio-Optical Research (SABOR) experiment to overfly ship-based optical measurements. Correlations of lidar-derived bbp with in situ ship-based measurements and lidar-derived Kd with MODIS retrievals during SABOR were excellent. Our poster will provide results from the CALIOP and HSRL studies and ideas on the scalability of the HSRL technique to space for global ocean profiling. Summary: This poster explores the use of lidar for remote sensing of ocean optical parameters including particulate backscatter and diffuse attenuation coefficient. It includes ocean retrievals using data from the CALIOP instrument on the CALIPSO satellite, airborne high spectral resolution lidar results from the 2014 SABOR mission, and projections on the potential capabilities of a future ocean-optimized spaceborne lidar.References: Behrenfeld, M. J., Y. Hu, C. A. Hostetler, G. Dall'Olmo, S. D. Rodier, J. W. Hair, and C. R. Trepte (2013), Space-based lidar measurements of global ocean carbon stocks, Geophys. Res. Lett., 40, 4355–4360, doi:10.1002/grl.50816.Report abuse »
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