Researchers are studying warm rings in mesoscale eddies in cold ocean waters, with satellite altimetry revealing hotspots of these eddies in the western Arctic Ocean. The characteristics and dynamics of these eddies are being examined in various ocean regions, including the western North Pacific and the Gulf Stream. The studies appear to be investigating different aspects of mesoscale eddies, including their detection, tracking, and longevity, using a range of methods and models.