Figure 6.22
Shifting physical systems. Many of Earth’s physical systems are responding to changing atmospheric CO2 concentrations and temperatures.(Muir Glacier photos: Field, William Osgood. 1941/Image/photo courtesy of Molnia, Bruce F. 2004/USGS and the National Snow and Ice Data Center, University of Colorado, Boulder. Muir Glacier: From the Glacier Photograph Collection. Boulder, Colorado USA: National Snow and Ice Data Center/World Data Center for Glaciology. Digital media.)