Mesoscale ocean eddies, an important element of the climate system, impact ocean
circulation, heat uptake, gas exchange, carbon sequestration and nutrient transport. Much of
what is known about ongoing changes in ocean eddy activity is based on satellite altimetry;
however, the length of the altimetry record is limited, making it difficult to distinguish
anthropogenic change from natural variability. Using a climate model that exploits a variable-
resolution unstructured mesh in the ocean component to enhance grid resolution in eddy …