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    Three-dimensional mapping of fluorescent dye using a scanning, depth-resolving airborne lidar

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    jtech2027%2E1.pdf (1.679Mb)
    Date
    2007-06
    Author
    Sundermeyer, Miles A.  Concept link
    Terray, Eugene A.  Concept link
    Ledwell, James R.  Concept link
    Cunningham, A. G.  Concept link
    LaRocque, P. E.  Concept link
    Banic, J.  Concept link
    Lillycrop, W. J.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/4128
    As published
    https://doi.org/10.1175/JTECH2027.1
    DOI
    10.1175/JTECH2027.1
    Keyword
     Lidars; In situ observations; Aircraft observations 
    Abstract
    Results are presented from a pilot study using a fluorescent dye tracer imaged by airborne lidar in the ocean surface layer on spatial scales of meters to kilometers and temporal scales of minutes to hours. The lidar used here employs a scanning, frequency-doubled Nd:YAG laser to emit an infrared (1064 nm) and green (532 nm) pulse 6 ns in duration at a rate of 1 kHz. The received signal is split to infrared, green, and fluorescent (nominally 580–600 nm) channels, the latter two of which are used to compute absolute dye concentration as a function of depth and horizontal position. Comparison of dye concentrations inferred from the lidar with in situ fluorometry measurements made by ship shows good agreement both qualitatively and quantitatively for absolute dye concentrations ranging from 1 to >10 ppb. Uncertainties associated with horizontal variations in the natural seawater attenuation are approximately 1 ppb. The results demonstrate the ability of airborne lidar to capture high-resolution three-dimensional “snapshots” of the distribution of the tracer as it evolves over very short time and space scales. Such measurements offer a powerful observational tool for studies of transport and mixing on these scales.
    Description
    Author Posting. © American Meteorological Society, 2007. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Atmospheric and Oceanic Technology 24 (2007): 1050-1065, doi:10.1175/JTECH2027.1.
    Collections
    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Journal of Atmospheric and Oceanic Technology 24 (2007): 1050-1065
     

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