Question

How can you distinguish between high chlorophyll concentration in the ocean and high chlorophyll concentration on land?

Answer 1

maybe this will assist The highest chlorophyll concentrations, where tiny surface-dwelling ocean plants are thriving, are in cold polar waters or in places where ocean currents bring cold water to the surface, such as around the equator and along the shores of continents. The polar–equator difference intensifies in the hemisphere experiencing summer. For example, the difference in chlorophyll concentration between the Southern Ocean and equatorial ocean areas is bigger in December than September. In polar waters, nutrients accumulate in surface waters during the dark winter months when plants can’t grow. When sunlight returns in the spring and summer, the plants flourish in high concentrations. 

Answer 2

In a satellite image, Places of high chlorophyll concentration in the ocean appear dark green in color while places of high chlorophyll concentration on land appears dark grey in color

Step-by-step explanation:

When we do an evaluation of GIS image for chlorophyll, places in sea where the chlorophyll concentrations is very high appears dark green in color in the satellite image while the places where chlorophyll concentration is low appears blue in color.

However on land, when the chlorophyll concentration is high i.e the number of plants are high in number on land , then such places appear dark gray in color while the places of low chlorophyll concentration appear light gray in color