Three-dimensional mapping of fluorescent dye using a scanning, depth-resolving airborne lidar
Sundermeyer, Miles A.
Terray, Eugene A.
Ledwell, James R.
Cunningham, A. G.
LaRocque, P. E.
Lillycrop, W. J.
MetadataShow full item record
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.
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.
Showing items related by title, author, creator and subject.
Sundermeyer, Miles A.; Skyllingstad, Eric D.; Ledwell, James R.; Concannon, Brian; Terray, Eugene A.; Birch, Daniel; Pierce, Stephen D.; Cervantes, Brandy T. Kuebel (John Wiley & Sons, 2014-11-06)Two near-surface dye releases were mapped on scales of minutes to hours temporally, meters to order 1 km horizontally, and 1–20 m vertically using a scanning, depth-resolving airborne lidar. In both cases, dye evolved into ...
Lazarus, Eli; Ashton, Andrew D.; Murray, A. Brad; Tebbens, Sarah; Burroughs, Stephen (American Geophysical Union, 2011-05-21)Using shoreline change measurements of two oceanside reaches of the North Carolina Outer Banks, USA, we explore an existing premise that shoreline change on a sandy coast is a self-affine signal, wherein patterns of change ...
Hammerling, Dorit M.; Kawa, S. Randolph; Schaefer, Kevin; Doney, Scott C.; Michalak, Anna M. (John Wiley & Sons, 2015-03-11)Satellite observations of carbon dioxide (CO2) offer novel and distinctive opportunities for improving our quantitative understanding of the carbon cycle. Prospective observations include those from space-based lidar such ...