(Click image to enlarge)

"Northern Hemisphere Temperatures During the Past Millennium: Inferences, Uncertainties, and Limitations," Geophysical Research Letters, March 15, 1999, Michael E. Mann, Raymond S. Bradley, and Malcolm K. Hughes

* Amazon rainforest very vulnerable  to likely temperature rise (June. 2009)

* Scientists: "Abrupt and irreversible shifts" increasingly likely (June, 2009)

* Antarctica's largest ice shelf disintegrates (April, 2009)

* Arctic meltdown poses global threat to humanity. (March, 2009)

* Warming seen as greatest threat to polar bears (March, 2009)

* Scientists: oceans will rise as much as three meters (March, 2009)

 * Acidification found thinning shells of sea animals (March, 2009)

* Drought turns Amazon rainforest into net carbon emitter (March, 2009)

* Chu warns of dire consequences for agriculture (Feb. 2009)

* Scientists see climate impacts lasting 1,000 years (Jan. 2009)

* Active hurricane seasons seem to correlate with fewer winter storms (Jan. 2009)

* US "old growth" tree death rates doubled in past 30 years (Jan. 2009)

* Scientists find Antarctica is warming (Jan. 2009)

* Canadian forests found to be sources of CO2 (Jan. 2009)

* Rapid climate change could impact US within decades (Dec. 2008)

* IPCC co-chair sees worsening climate impacts (Dec. 2008)

* Greenhouse gases hit all-time high concentrations (Nov. 2008)

* CO2 found acidifying Kansas groundwater (Nov. 2008)

* Pine beetle devastation of western pine forests accelerates (Nov. 2008)

* Asian smog masks warming impacts (Nov. 2008)

* Scientists detect greenhouse warming in Antarctica (Nov. 2008)

* Atmosphere is ripe for climate disaster now (Nov. 2008)

* Current warming trend is steepest in 5,000 years (Nov. 2008)

* One quarter of land mammals face extinction (Oct. 2008)

* Climate change outpacing IPCC projections (Oct. 2008)

* Scientists startled by Arctic seabed methane releases (Sept. 2008) 

* Schellnhuber: Any CO2 over 280 ppm is unsafe (Sept. 2008)

* Higher temperatures turn plants to CO2 sources (Sept. 2008)

* Warming is disrupting corn pollination patterns (Sept. 2008)

* Arctic melt may signal warming is "unstoppable" (Sept. 2008)

* Findings link global warming to hurricane intensity (Sept.2008)

* Temperatures of last decade unmatched in 1300 years (Sept. 2008)

* Scientists astounded by speed of prehistoric deep freeze (Aug. 2008)

* Canada loses huge chunk of ice shelf (July, 2008)

* Scientists amazed at speed of ancient "climate snaps" (June, 2008)

* Hansen: Oil, Coal execs are committing "crimes againt humanity" (June, 2008)

* Antarctic iceberg suffocates seals (May, 2008)

* Ocean warming is expanding marine "dead zones" (May, 2008)

* Warming to spawn fewer -- but more intense -- hurricanes (May, 2008)

* Scientists at NASA and other research labs tie more tornadoes to warming (May, 2008)

* Tropical insects at risk of warming-driven extinction (May, 2008)

* Humans have upset earth's 600,000-year carbon balance (April, 2008)

* Warming seen decreasing oxygen levels in oceans (May, 2008)

* Models project a 10-year pause in warming (May, 2008)

* Pine beetles turn western forests into CO2 source (April, 2008)

* Migrating jet stream will lead to more weather extremes (April, 2008)

* Ocean carbon saturation could have a 1,500-year impact (April, 2008)

* Scientists: World must go zero-carbon -- soon (March, 2008)