Global Warming Articles:
Reading the Tree-Rings
Massive Pinyon Pine Die-off
Polar Melting
Hard Numbers on Global Warming
African Lake Demonstrates Effects of Global Warming
Global Climate Change Lecture Series
Fall 2006 Alumnus Global Warming update:
Forest Fires
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The University of Arizona Alumnus — Summer 2006 GLOBAL WARMING Part I: Building a bridge between science and society Our planet is in the midst of significant global climate change that has great potential for affecting the way we live. The University of Arizona is known for its tradition of vigorous scientific debate — a custom now fully engaged with discussions over global change. This first part of our series includes a look at analysis of past climate changes by Malcolm Hughes of the UA’s Laboratory of Tree-ring Research, documentation of drought-related pinyon pine die-offs by the School of Natural Resources, charting of rapid climate changes in the Antarctic by John Overpeck, director of the UA’s Institute for the Study of Planet Earth (ISPE), and Geosciences department research on plunging fish yields in Africa’s Lake Tanganyika. The National Academy of Sciences, in a broad review of scientific work requested by Congress, studied tree rings, corals and other natural formations, and other natural formations, and concluded that the Earth is heating up to a level unprecedented for potentially the last several millennia. A panel of top climate scientists told lawmakers that Earth is heating up and that “human activities are responsible for much of the recent warming.” Climate scientists Michael Mann and Raymond Bradley, and the UA’s Malcolm Hughes concluded that the Northern Hemisphere is the warmest it has been in 2,000 years. The scientists said the evidence reliably showed sharp spikes in carbon dioxide and methane, the two major greenhouse gases blamed for trapping heat in the atmosphere. The buildup of the gases began in the 20th century, after remaining fairly level for 12,000 years. — Source: Associated Press, June 22, 2006
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