How Can One Ocean Current Affect the Whole North Atlantic?
ES2403  Sea Surface Temperatures and Chlorophyll Concentrations

The map on the left shows sea surface temperatures for part of the Gulf Stream. The map on the right shows chlorophyll concentrations in the same area.

  !   Examine the two images to look for patterns that would indicate the two quantities are related.

Sea surface temperatures for the Atlantic.
 Chlorophyll concentrations in the Atlantic.

You can see that phytoplankton is generally more abundant in colder waters and less abundant in warmer waters. Other factors such as depth affect chlorophyll concentration too, but we will focus only on temperature to examine how eddies affect productivity.

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