Abstract
Analysis of two 1994 Landsat-5 Thematic Mapper (TM) images (TM bands 1, 2, 3, 4 and 5) from a shallow coastal lagoon in Brazil yielded high correlations between the digitally processed upwelling radiances and synoptic field measurements of chlorophyll- a and Secchi disk depths in water depths greater than 3.5 m. However, in shallower water, bottom reflectance dominates the optical signal. Here the TM images can be used to identify regions of microphytobenthic communities with different densities (levels of productivity). A principal component analysis (PCA) of TM bands 1, 2 and 3 yielded more consistent correlations with chlorophyll- a and turbidity variability than the raw TM data. PC1 and PC2 correlated with chlorophyll- a and PC1 correlated with Secchi disk depths on both dates.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
