January 22, 2009

Human is Responsible for Global Warming !

Global warming is the increase in the average temperature of the Earth's near-surface air and oceans since the mid-20th century and its projected continuation.Global surface temperature increased 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the 100 years ending in 2005.The Intergovernmental Panel on Climate Change (IPCC) concludes that most of the temperature increase since the mid-twentieth century is "very likely" due to the increase in anthropogenic greenhouse gas concentrations. Natural phenomena such as solar variation and volcanoes probably had a small warming effect from pre-industrial times to 1950 and a small cooling effect from 1950 onward. These basic conclusions have been endorsed by at least 30 scientific societies and academies of science, including all of the national academies of science of the major industrialized countries. While individual scientists have voiced disagreement with these findings,the overwhelming majority of scientists working on climate change agree with the IPCC's main conclusions.[]
Scientists Agree Human-induced Global Warming Is Real, Survey Says: A broad poll of experts taken by earth scientists finds that the vast majority of climatologists and other earth scientists believe in global warming and think human activity is a factor for the temperature rise. This survey dispels lingering doubts by some of a consensus among the scientists.[1]
Apparent Problem With Global Warming Climate Models Resolved: Yale University scientists may have resolved a controversial glitch in models of global warming: A key part of the atmosphere didn't seem to be warming as expected. Computer models and basic principles predict atmospheric temperatures should rise slightly faster than, not lag, increases in surface temperatures. Also, the models predict the fastest warming should occur at the Tropics at an altitude between eight and 12 kilometers. However, temperature readings taken from weather balloons and satellites have, according to most analysts, shown little if any warming there compared to the surface.[2]



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