Earth temperature increases

The models so far on climate change have dramatically underestimated the warming due to greenhouse gases, experts warned.

This means that current projections of temperature increases is incorrect and should be revised upwards over 2nd C, even up to 7.7 ° Celsius by the end of the 21st century.

British efforts to combat climate change have focused on banning the levels of carbon dioxide above 450 parts per million, equivalent to a rise 2 ° Celsius. If the world more heated, many climate experts believe fragile ecosystems that will also compel beyond the "balance", causing global warming without refund.

This phenomenon came to light during a study of the effects of global surface temperatures in atmospheric levels of carbon dioxide. Scientists have long known that greenhouse gases raise temperatures by making essentially an 'insulation' of the planet. But there is another less well known mechanism is that the planet the more carbon dioxide is due to release from the soil and oceans. The result is a mechanism where atmospheric carbon dioxide creates warming, forcing then naturally released more carbon dioxide.

The Peter Cox, director of science for climate change at the Center for Ecology and Hydrology in Dorset, together with researchers from the U.S. and the Netherlands used 'karotatou ice from the Antarctic to study the levels of carbon dioxide trapped during a period called interglacials short time, from 1550 to 1850. The researchers found that carbon dioxide is increasing rapidly with the heating, because the soil decomposed faster and oceans have lost more than gas.
Because scientists were unable to measure the effect before, has not included this phenomenon in many climate models. But when taken into account, they found that levels of carbon dioxide in the models led to higher temperatures, somewhere between 15 and 78%. A recent report by the Intergovernmental Panel on Climate Change found that levels of carbon dioxide probably doubled pre-industrial levels by 2050. The latest research makes estimates between 1.6 ° C and 6 ° Celsius.

The Margaret Torn head of research, Lawrence Berkeley National Laboratory, said: "To predict the future must guess whether the levels of carbon dioxide will rise. It depends on the greater uncertainty, what people do."

In another report Australian researchers predict that by 2100 the average temperature of Earth could rise by more than 1.4 to 5.8 degrees Celsius, predicted in 2001 the intergovernmental body for the UN Climate Change.

Also, that global warming will increase more than expected frequency of extreme weather events such as the heat wave that hit central Europe in August 2003.

And the melting ice will reduce the reflection of the Earth's surface near the ice resulting in rising temperatures. Thus, the Arctic Ocean, towards the end of the century may not have hardly any ice in the summer