The Sea Surface Temperature (SST) data of the Arctic show temperature ranges in degrees C using points whose locations correspond to the centroids of AVHRR Pathfinder version 5 monthly, global, 4 km data set (PFSST V50). The pathfinder rasters are available from the NOAA National Oceanographic Data Center (NODC) and from the Physical Oceanography Distributed Active Archive Center (PO.DAAC), hosted by NASA JPL. Furthermore, each point in the SST dataset is categorized by the ecoregion in which it is located. This classification is based on the Marine Ecosystems Of the World (MEOW) developed and distributed by The Nature Conservancy. These data have been QA'd in that we have selected only data values with associated quality flags of 4-7. No data points are not included here.