Aerial Imaging of Fluorescent Dye in the Near Shore

作者：Clark David B^*; Lenain Luc; Feddersen Falk; Boss Emmanuel; Guza R T

来源：Journal of Atmospheric and Oceanic Technology, 2014, 31(6): 1410-1421.

DOI：10.1175/JTECH-D-13-00230.1

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.

• 出版日期2014-6