@InProceedings{CostaTelmNovo:2011:SpTeVa,
               author = "Costa, M. and Telmer, K. and Novo, E. M. L. M.",
          affiliation = "Department of Geography, University of Victoria, PO Box 3050, 
                         Victoria, BC, Canada and School of Earth and Ocean Sciences, 
                         University of Victoria, Victoria, BC, Canada and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Spatial and temporal variability of light attenuation in the 
                         amazonian waters",
            booktitle = "Proceedings...",
                 year = "2011",
         organization = "International Symposium on Remote Sensing of Environment - The 
                         GEOSS Era: Towards Operational Environmental Monitoring, 34.",
            publisher = "Elsevier",
             keywords = "Electromagnetic wave attenuation, Environmental engineering, 
                         Regression analysis, Remote sensing, Amazon river, Down-welling, 
                         HyperSpectral, Light attenuation, Spatial and temporal 
                         variability, Spatial temporals, Stepwise multiple regression, 
                         Vertical attenuation.",
             abstract = "Quantification of hyperspectral downwelling vertical attenuation 
                         coefficient (Kd) and irradiance (Ed) in the euphotic depth (Zeu) 
                         in 2005 (falling) and 2006 (rising waters) in Amazonian waters 
                         showed that Kd is higher in the blue (5-9 m-1), decreasing towards 
                         the green (4-7 m-1) and red (3-5 m-1) part of the spectra. 
                         Further, Kds are generally higher in white waters than in black 
                         and clear waters. A stepwise multiple regression analysis showed 
                         that when all the data is polled together, TSS and acdom are the 
                         main drivers of spectral Kds (R2 \∼ 0.65; p<0.005). 
                         However, when analyzing only black and clear waters Chla also 
                         explains the variability of Kds (R2 \∼ 0.96; p<0.005). The 
                         selective attenuation by the optical constituents result in 
                         maximum light reaching Zeu of 1.0 to 0.5 m (white waters) is 
                         dominantly at 685nm, Zeu of 1.8 to 3.0 m (black) is at 695nm, and 
                         Zeu of 4.0 to 3.0 m (clear) is at 590nm.",
  conference-location = "Sydney",
      conference-year = "10-15 Abr. 2011",
             language = "en",
        urlaccessdate = "15 maio 2024"
}