Map of summer chlorophyll-a concentrations observed in 2005
Note: new version is available!
The low category refers to values within the lowest 20th percentile and the high category refers to values within the upper 20th percentile of concentrations in a regional sea
Moderate category refers to values that fall between the 20th and 80th percentile. The scale used is different for each regional sea to accommodate for the different characteristics of the seas