3. What are the chlorophyll a values in Narragansett Bay?
The amount of chlorophyll in Narragansett Bay is highly variable throughout the Bay. In general, there are winter-spring diatom blooms, which cause peaks in the chlorophyll concentration. There is often a second, smaller bloom in summer. The chlorophyll a concentration will generally be higher in the northern part of the Bay. Chlorophyll a concentrations will be highest near, but usually not at, the water surface. Chlorophyll is measured in micrograms per liter. The winter-spring blooms frequently see chlorophyll values above 75 micrograms per liter.
Narragansett Bay Chlorophyll
(Click for larger image)
|This image shows the chlorophyll a in northern Narragansett Bay from a satellite. Red colors are the highest concentrations of chlorophyll and the dark blue and purple colors are the lowest chlorophyll concentrations. Image courtesy Dr. John Mustard, Brown University.