Global warming, Arizona style

An ongoing series in the New York Times looks at how climate change is hitting Summerhaven, Ariz., a so-called sky island near Mount Lemmon. Though the story acknowledges that the recent changes could fall within the normal range of ecological cycles(unless they're burning down homes, forest fires are considered a natural part of the area's ebb and flow), it also points to mounting evidence that the temperature is rising quickly and steadily.

High above the desert floor, this little alpine town has long served as a natural air-conditioned retreat for people in Tucson, one of the so-called sky islands of southern Arizona. When it is 105 degrees in the city, it is at least 20 degrees cooler up here near the 9,157-foot summit of Mount Lemmon.

But for the past 10 years or so, things have been unraveling. Winter snows melt away earlier, longtime residents say, making for an erratic season at the nearby ski resort, the most southern in the nation.

Source: New York Times