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
ecosystems 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."
