QOLQEPUNKU GLACIER, Peru -- One recent moonlit night high in the Peruvian Andes, about 200 men dressed in furry cloaks and woolen masks trekked up to a glacier whose ice is said to have magical healing properties. In the past these men, called ukukus after the word for bear in the local Quechua language, cut and hauled down large blocks of ice to share with family, friends and livestock as part of an annual Catholic pilgrimage known as El Señor de Qoyllur Rit'i that usually draws about 40,000 worshipers to a dizzying 16,000 feet above sea level.These days, cutting ice is all but taboo. "We used to take ice, but now it's prohibited," said Darwin Apaza Año, a broad-faced ukuku from the province of Anta. The bear-men say their sacred glacier is disappearing. Over a period of two decades, its edge has drawn back 600 feet along the boulder-strewn slope leading to the church in the valley below, according to people here. Even compared with last year, the glacier is noticeably smaller. That's a worrisome portent for locals who still worship snowcapped mountains as gods, or apus. It's out of concern for the apu living here, the bear-men say, that they have decided not to take any more blocks of ice.
Although few on this remote mountaintop are aware of it, the demise of this Andean ice-cutting ritual is likely the result of global warming. The United Nations says rising temperatures are causing glaciers to recede throughout the world, with some of the most pronounced effects on relatively rare patches of ice in countries like Peru that lie within the tropics.