The U.S. Geological Survey Global Change Research Program page provides information concerning its research on global change. The Program presents its research sections that deal with global characteristics of the modern world oceans, paleoclimate studies of the Arctic Ocean, methane and gas hydrates in Arctic sediments and permafrosts, volcano emissions and software tools. The software includes ANALOG, a program for estimating paleoclimate parameters. There are sea surface temperature data sets and polar sea ice concentration data sets.