Ivey, J. E.. University of S. Florida, (813) 553-1189
Carder, K. E.. University of S. Florida, (813)553-1189
INTENSIVELY LEARNING OPTICAL OCEANOGRAPHY: MODEL CLOSURE BETWEEN REMOTE SENSING REFLECTANCE (RRS) AND INHERENT OPTICAL PROPERTY (IOP) MEASUREMENTS IN PUGET SOUND
The validation of inversion models for estuarine environments is dependent on the acquisition of accurate in-situ data. The development of high-resolution, multi-spectral instrumentation has made this possible. An experiment conducted during Ocean-Optics Course at the University of Washington's Friday Harbor laboratory, involved the deployment of a slow-drop package using the following: ac-9, Spectrix Ed sensor, CTD, and Hydroscat6. The Rrs data were acquired using a hand-held Spectrix sensor. The inversion of the Rrs data to derive IOPs was accomplished using a modified version of the Lee-Carder Rrs Model. The back-scattering data for the inversion process were modeled using the MODIS algorithm. The model was initialized using representative shapes for absorption spectra for particulate and DOM and adjusted using concentration coefficients. The resulting total absorption and back-scattering spectra were compared to the in-situ total absorption and back scattering spectra as integrated over the upper optical depth. Closure within +18% of the measured absorption and ±15% of the measured back-scattering was achieved by the model. The model provided the added benefit of diagnosing whether the proper amount of sky reflectance and sun glint had been removed from the Rrs spectra. This exercise helped to validate the model and measurements.
Day: Thursday, Feb. 4
Location: Sweeney Center