Global warming could trigger cascade of climatic changes

Global warming and the partial melting of polar ice sheets can dramatically affect not only sea levels but also Earth’s climate, in ways that may be complex, rapid and difficult to adjust to, scientists say in a new study to be published Friday in the journal Science. Sea level and climatic changes in Earth’s distant past, near the end of the last Ice Age about 14,600 years ago, offer significant clues to some phenomena that Earth may experience in the near future, possibly in coming decades or centuries, the study found.