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Natural Climate Shifts Drove Coral Reefs to a Total Ecosystem Collapse Lasting 2,500 Years
July 5, 2012 — A new article shows how natural climatic shifts stopped reef growth in the eastern Pacific for 2,500 years. The reef shutdown, which began 4,000 years ago, corresponds to a period of dramatic swings ... > full story -
Pre-Industrial Emissions Still Causing Temperatures to Rise
July 4, 2012 — When evaluating the historic contributions made by different countries to the greenhouse gasses found in Earth's atmosphere, calculations generally go back no further than the year 1840. New research ... > full story -
Pinpointing History of Droughts Through Exploration of Tree Rings: Unexpected Complexity in U. S. West's Patterns of Drought
July 2, 2012 — Through an exploration of tree rings and oxygen isotopes, researchers are now able to better pinpoint the history of droughts in the arid and semiarid areas of the American ... > full story -
New Deglaciation Data Opens Door for Earlier First Americans Migration
June 21, 2012 — A new study of lake sediment cores from Sanak Island in the western Gulf of Alaska suggests that deglaciation there from the last Ice Age took place as much as 1,500 to 2,000 years earlier than ... > full story -
Ancient Warming Greened Antarctica, Study Finds
June 17, 2012 — A new study finds ancient Antarctica was much warmer and wetter than previously suspected. The climate was suitable to support substantial vegetation -- including stunted trees -- along the edges of ... > full story -
Woolly Mammoth Extinction Has Lessons for Modern Climate Change
June 12, 2012 — Not long after the last ice age, the last woolly mammoths succumbed to a lethal combination of climate warming, encroaching humans and habitat change -- the same threats facing many species ... > full story -
Today's Climate More Sensitive to Carbon Dioxide Than in Past 12 Million Years
June 6, 2012 — Until now, studies of Earth's climate have documented a strong correlation between global climate and atmospheric carbon dioxide; that is, during warm periods, high concentrations of CO2 ... > full storyMore: -
Exceptional Rise in Ancient Sea Levels Revealed
June 5, 2012 — Since the end of the last ice age 21,000 years ago, our planet has seen ocean levels rise by 120 meters to reach their current levels. This increase has not been constant, rather punctuated by rapid ... > full story -
Sierra Nevada 200-Year Megadroughts Confirmed
June 1, 2012 — The culmination of a comprehensive high-tech assessment of Fallen Leaf Lake -- a small moraine-bound lake at the south end of the Lake Tahoe Basin -- shows that stands of pre-Medieval trees in the ... > full story -
Plate Tectonics Cannot Explain Dynamics of Earth and Crust Formation More Than Three Billion Years Ago
June 1, 2012 — The current theory of continental drift provides a good model for understanding terrestrial processes through history. However, while plate tectonics is able to successfully shed light on processes ... > full story
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