Greenpeace co-founder on whether melting glaciers are good or bad

From Greenie Watch: An email below from Patrick Moore [pmoore@greenspirit.com], a co-founder of Greenpeace, to Benny Peiser The issue of melting glaciers in the Himalayas, and elsewhere, makes my head hurt due to cognitive dissonance. The UN COP15 Newsletter states, "Mountain glaciers in Asia are melting at a rate that could eventually threaten water supplies, irrigation or hydropower for 20 percent to 25 percent of the world's population, according to the UNEP report." Lester Brown of the Earth Policy Institute puts it this way, "The melting of the glaciers in the Himalayas and on the Tibetan Plateau will deprive the Indus, Ganges, Yangtze and Yellow rivers of the ice melt that sustains their flow during the dry season and the irrigation systems that depend on them." In other words the supply of melt water from the melting glaciers is threatened by the melting of the glaciers. This is correct in that if the glaciers melt completely there will be no more melt water from the glaciers. What if the glaciers were not melting due to a colder climate? Then where would the irrigation water come from? How about if the glaciers were advancing 100 meters per year toward the villages that need the melt water for irrigation? How does the logic of this situation escape these bright minds? It snows every winter in the Himalayas. When the snow melts it fills the rivers. Where there is net melting of the glaciers this adds additional water to the rivers. But they can't have it both ways. If they want to have continued melt water from the glaciers then the glaciers must continue to melt. Seeing that the glaciers are finite in size this would eventually result in no glacier, and reliance on annual snow melt. Am I missing something here?

Posted via email from Garth's posterous