Figure SPM-1: Locations
at which systematic long-term studies meet stringent criteria documenting recent
temperature-related regional climate change impacts on physical and biological
systems. Hydrology, glacial retreat, and sea-ice data represent decadal to century
trends. Terrestrial and marine ecosystem data represent trends of at least 2 decades.
Remote-sensing studies cover large areas. Data are for single or multiple impacts
that are consistent with known mechanisms of physical/biological system responses
to observed regional temperature-related changes. For reported impacts spanning
large areas, a representative location on the map was selected.