The study of ice composition represents an effective tool in our understanding of the dynamics of glaciers, ice sheets and ice shelves. The authors of this work relate the distribution of isotopes and impurities in ice masses to ice flow, to the key zone close to the ice-substratum interface and to the mechanisms effective in the contact zone between glacier and ocean. Other material in this book is concerned with how global changes may be induced by a climatic warming due to anthropogenic activities. This monograph on glaciology, geophysics and geomorphology is intended for researchers, graduate students and teachers.