Global Warming: Coming, Ready or Not!
Watch National Center for Atmospheric Research's Head of Climate Analysis Dr. Kevin E. Trenberth deliver a presentation on climate change.
Click here to play the video.
Global warming is unequivocally happening and is caused by human activities, mostly the burning of fossil fuels. The evidence is now widespread from many variables including global and regional temperatures, sea temperatures, sea level rise, melting ice, changes in precipitation patterns, intensity, and rain versus snow, accompanied by changes in storms and atmospheric circulation and drought. Climate models forced with observed changes in atmospheric composition show that the human influence on climate has exceeded the natural variability since about 1970, and the ability to simulate the changes provides confidence in future projections. The long lifetime of carbon dioxide and the energy infrastructure guarantee future increases in emissions for several decades and thus substantial further global warming. Efforts to control emissions are important and promising but unlikely to make adequate inroads to slow the problem unless there is a major change in attitudes and the political will to implement changes. Our planet is potentially changing into one that will not be recognizable in 50 years and beyond. Efforts must be made to build a more sustainable way of life.
Published: Wednesday, May 12, 2010