Something tells me that when it comes to predicting the weather, intelligence agencies should be more concerned with mushroom clouds over American cities than icebergs near Greenland. And yet:

WASHINGTON, May 11 — Stepping into the middle of a partisan debate on Capitol Hill, the United States’ top intelligence official has endorsed a comprehensive study by spy agencies about the impact of global warming on national security.
In a letter written earlier this week to the House Intelligence Committee, the official, Michael McConnell, director of national intelligence, said it was “entirely appropriate” that the intelligence community prepare an assessment of the “geopolitical and security implications of global climate change.”
The question of whether the country’s spy agencies, already burdened by the wars in Iraq and Afghanistan as well as the global hunt for members of Al Qaeda, ought to investigate the security implications of global warming has been debated in Congress for several weeks.