Diurnal changes in ocean color sensed in satellite imagery
| Autor: | Michael Ondrusek, Inia M. Soto, Sherwin Ladner, Haoping Yang, Ryan Vandermeulen, Robert Arnone |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Water mass
genetic structures 010504 meteorology & atmospheric sciences Advection fungi Physical oceanography Atmospheric sciences 01 natural sciences 010309 optics Ocean color 0103 physical sciences General Earth and Planetary Sciences Environmental science Radiometry Satellite imagery Spatial variability sense organs skin and connective tissue diseases Optical depth 0105 earth and related environmental sciences |
| Zdroj: | Journal of Applied Remote Sensing. 11:032406 |
| ISSN: | 1931-3195 |
| DOI: | 10.1117/1.jrs.11.032406 |
| Popis: | Measurements of diurnal changes in ocean color in turbid coastal regions in the Gulf of Mexico were characterized using above water spectral radiometry from a National Aeronautics and Space Administration (aerosol robotic network-WaveCIS CSI-06) site that can provide 8 to 10 observations per day. Satellite capability to detect diurnal changes in ocean color was characterized using hourly overlapping afternoon orbits of the visual infrared imaging radiometer suite (VIIRS) Suomi National Polar-orbiting Partnership ocean color sensor and validated with in situ observations. The monthly cycle of diurnal changes was investigated for different water masses using VIIRS overlaps. Results showed the capability of satellite observations to monitor hourly color changes in coastal regions that can be impacted by vertical movement of optical layers, in response to tides, resuspension, and river plume dispersion. The spatial variability of VIIRS diurnal changes showed the occurrence and displacement of phytoplankton blooming and decaying processes. The diurnal change in ocean color was above 20%, which represents a 30% change in chlorophyll-a. Seasonal changes in diurnal ocean color for different water masses suggest differences in summer and winter responses to surface processes. The diurnal changes observed using satellite ocean color can be used to define the following: surface processes associated with biological activity, vertical changes in optical depth, and advection of water masses. |
| Databáze: | OpenAIRE |
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