Guardian: As I sit here in a northern part of the United States (Minnesota), a rare summer arctic blast barrels down from Canada on what otherwise is one of the warmest days of the year. Global warming? I could use some global warming today, people are saying.
Not only is this a teachable moment, but it coincides with a major new study on climate connections. First, lets see the current jet stream. It is wildly undulating, first swinging up into northern Canada before curving back and plunging into the...