Anthony Vodacek


©1989 Institute of Electrical and Electronics Engineers (IEEE). Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Remote sensing of dissolved organic matter (DOM) in natural waters by laser-induced fluorescence has been limited to emission spectra which are not sufficient for discriminating changes in composition of DOM. Fluorescence quenching by various cations (e.g. hydrogen ion) only adds to the uncertainty. Synchronous fluorescence spectra can potentially provide compositional information since spectral peak positions may indicate DOM composition. The usefulness of synchronous data for prediciting pH was tested for 21 lake samples and compared to the results obtained for emission data. Also, predictions of DOC using emission were compared to predictions using synchronous data for 11 of the lake samples. The synchronous data gave a better correlation with pH (R^2=0.71), and matched the high correlation of DOC and emission data (R^2=0.94). The critical synchronous data i this example could be reproduced with a three-wavelength lidar.

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Chester F. Carlson Center for Imaging Science (COS)


RIT – Main Campus