books.google.it - Concerns about the effects of global climate change have focused attention on the vulnerability of circumpolar regions. Long-term historical data are needed to better understand the magnitude and direction of environmental change related to both natural and anthropogenic causes, as well as to assess...http://books.google.it/books/about/Long_term_Environmental_Change_in_Arctic.html?hl=it&id=dWS-jMgkX6AC&q=lake+ice&utm_source=gb-gplus-shareLong-term Environmental Change in Arctic and Antarctic Lakes
