Satellite Overlays

Monthly Composite

Monthly composite satellite images of sea surface temperature and chlorophyll.

How to use this page to learn about algal blooms

  • Move your mouse cursor over the map on the left to see a zoomed in view of the sea surface temperatures (SST).
  • Use the color scale on the right of the SST map to find the SST (°C) for the area in the 'zoom box' (red = high, blue = low).
  • Move your mouse to the map on the right side to see a zoomed in view of the chlorophyll (indicating algae that may be causing HABs).
  • Use the color scale on the right side of the Chlorophyll map to find the Chlorophyll surface concentration (mg/m^3) calculated from Chlorophyll fluorescence values.
  • Compare the same area on both maps to see if there is any connection between SST (high or low) and chlorophyll.
  • Click top links to view maps at different time-scales.
  • The '8-day composite with Surface Currents' top link shows a map of 8-day averaged SST with HF Radar surface current
    vectors from the last 25 hrs overlayed on top to show potential relationships between currents and SST or algae.

Image sources

  • SST: NOAA Coast Watch Program and NOAA NWS Monterey Regional Forecast Office (satellite is POES AVHRR HRPT)
  • Chlorophyll a: NOAA Coast Watch Program and the NASA Goddard Space Flight Center Oceancolor (G. Feldman) (AQUA MODIS).