Air-Ice Interface: Polar Ice

The deposition and preservation of layers of snow, year after year, enable many climate and environmental parameters to be recorded in the structure and composition of the ice, as well as in its gas inclusions and impurities. This section is devoted specifically to information on climate variables; the composition of the atmosphere and biogeochemical cycles are discussed in Chap. 1 of this volume and Chap. 1 of Volume 2.