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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 15 — May. 20, 1998
  • pp: 3222–3226

Airborne laser-induced oceanic chlorophyll fluorescence: solar-induced quenching corrections by use of concurrent downwelling irradiance measurements

Frank E. Hoge, C. Wayne Wright, Robert N. Swift, and James K. Yungel  »View Author Affiliations


Applied Optics, Vol. 37, Issue 15, pp. 3222-3226 (1998)
http://dx.doi.org/10.1364/AO.37.003222


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Abstract

Airborne laser-induced (and water Raman-normalized) spectral fluorescence emissions from oceanic chlorophyll were obtained during variable downwelling irradiance conditions induced by diurnal variability and patchy clouds. Chlorophyll fluorescence profiles along geographically repeated inbound and outbound flight track lines, separated in time by ∼3–6 h and subject to overlying cloud movement, were found to be identical after corrections made with concurrent downwelling irradiance measurements. The corrections were accomplished by a mathematical model containing an exponential of the ratio of the instantaneous-to-average downwelling irradiance. Concurrent laser-induced phycoerythrin fluorescence and chromophoric dissolved organic matter fluorescence were found to be invariant to downwelling irradiance and thus, along with sea-surface temperature, established the near constancy of the oceanic surface layer during the experiment and validated the need for chlorophyll fluorescence quenching corrections over wide areas of the ocean.

© 1998 Optical Society of America

OCIS Codes
(010.3640) Atmospheric and oceanic optics : Lidar
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(280.3640) Remote sensing and sensors : Lidar
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

History
Original Manuscript: October 14, 1997
Revised Manuscript: February 11, 1998
Published: May 20, 1998

Citation
Frank E. Hoge, C. Wayne Wright, Robert N. Swift, and James K. Yungel, "Airborne laser-induced oceanic chlorophyll fluorescence: solar-induced quenching corrections by use of concurrent downwelling irradiance measurements," Appl. Opt. 37, 3222-3226 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-15-3222

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