Aerial imaging of fluorescent dye in the near shore

TitleAerial imaging of fluorescent dye in the near shore
Publication TypeJournal Article
Year of Publication2014
AuthorsClark D.B, Lenain L., Feddersen F, Boss E., Guza RT
JournalJournal of Atmospheric and Oceanic Technology
Date Published2014/06
Type of ArticleArticle
ISBN Number0739-0572
Accession NumberWOS:000337204800016
Keywordsdiffusion; phytoplankton; surf zone; tracers; water

Aerial images are used to quantify the concentration of fluorescent Rhodamine water tracing (WT) dye in turbid and optically deep water. Tracer releases near the shoreline of an ocean beach and near a tidal inlet were observed with a two-band multispectral camera and a pushbroom hyperspectral imager, respectively. The aerial observations are compared with near-surface in situ measurements. The ratio of upwelling radiance near the Rhodamine WT excitation and emission peaks varies linearly with the in situ dye concentrations for concentrations <20ppb (r(2) = 0.70 and r(2) = 0.85-0.88 at the beach and inlet, respectively). The linear relationship allows for relative tracer concentration estimates without in situ calibration. The O(1 m) image pixels resolve complex flow structures on the inner shelf that transport and mix tracer.

Short TitleJ. Atmos. Ocean. Technol.
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