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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 33 — Nov. 20, 2003
  • pp: 6564–6568

Continuous hyperspectral absorption measurements of colored dissolved organic material in aquatic systems

Gary J. Kirkpatrick, Cristina Orrico, Mark A. Moline, Matthew Oliver, and Oscar M. Schofield  »View Author Affiliations


Applied Optics, Vol. 42, Issue 33, pp. 6564-6568 (2003)
http://dx.doi.org/10.1364/AO.42.006564


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Abstract

The majority of organic carbon in the oceans is present as dissolved organic matter (DOM); therefore understanding the distribution and dynamics of DOM is central to understanding global carbon cycles. Describing the time-space variability in colored dissolved organic matter (CDOM) has been difficult, as standard spectrophotometric methods for CDOM determination are laborious and susceptible to methodological biases. Previously, measurements of CDOM absorption in discrete water samples by use of a liquid-waveguide capillary cell (LWCC) compared favorably with measurements made with a benchtop spectrophotometer. Given this, we focused on automating the LWCC technique to improve our spatial and temporal sampling capabilities for CDOM. We found strong correlations between CDOM absorption spectra collected from discrete water samples using standard methods and selected corresponding CDOM spectra collected by the automated LWCC system. The near-continuous measurements by the LWCC system made it possible to map the temporal, spatial, and spectral variability of CDOM absorption along the ship track.

© 2003 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(230.7370) Optical devices : Waveguides
(300.6550) Spectroscopy : Spectroscopy, visible

History
Original Manuscript: March 10, 2003
Revised Manuscript: August 8, 2003
Published: November 20, 2003

Citation
Gary J. Kirkpatrick, Cristina Orrico, Mark A. Moline, Matthew Oliver, and Oscar M. Schofield, "Continuous hyperspectral absorption measurements of colored dissolved organic material in aquatic systems," Appl. Opt. 42, 6564-6568 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-33-6564


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