Friday, December 9, 2011
Experts from the Intergovernmental Panel on Climate Change (IPCC) met in Paris for a period of four days to publish long-awaited report on the scientific evidence on global warming. This report is one of the rehabilitation in 2001 and is recognized by 192 United Nations member states.
French daily "Le Monde" took possession of a copy of the document, which presented a few passages.
UN Intergovernmental Panel on Climate Change will present the report Friday, February, February, and expect it to contain detailed evidence on links between human activities and global warming.
Referring to paleoclimaterice information, text announces an increase in temperature by about 3 degrees Celsius by 2100, growth can be correlated with weather changes during massive glaciation. Research indicates that polar average temperatures during that period were about 3-5 degrees Celsius higher than those recorded in the twentieth century.
"Media during the last ice age sea level (about 125 000 years ago) was probably only 4-6 m higher than during the twentieth century, due to massive melting of polar icecaps," notes the report.
Research shows that sea level has risen considerably over the past 13 years, and at the same time, the surface of ice and snow that covers the two hemispheres of the Earth have small visible.
A crucial passage in the new report indicates that "drastic climate change is expected if atmospheric carbon concentrations reach 550 ppm (parts per million), which would cause a temperature increase of about 3 degrees Celsius."
In the study published in 2001, the concentration of carbon was estimated at only 480 ppm, while the temperature was expected to grow only by 1.5 degrees.
Warming has very little chance (less than 10 percent) to be below 1.5 degrees, while "values substantially greater than 4.5 degrees can not be excluded," said the document, thus aggravating the forecast.
Global warming was the attention of specialists for over 40 years, but so far not taken any significant extent.
Until recently, scientists have embraced the idea that global warming will cause major changes and acute problems in the world, but their thinking as they provide scenario will happen in a period of somewhere between 50 and 100 years and that's when the effects will be felt.
The average concentration of carbon dioxide in Earth's atmosphere before the industrial era stood at 280 ppm. Today, it reached 380 ppm, which means an increase of 100 ppm, 2.6 ppm of which only in 2005.
Thanks to recent analysis, it was shown that this increase is due almost entirely to the use of fossil fuels in energy production (and the rest comes largely from tropical deforestation, leading eventually to release the carbon locked in biomass).
Another fact is the constant increase of energy needs of mankind: they increased by 15% only in the first 5 years since the beginning of XXI century, growth was estimated by 2030 at least 60%.
The concentration of carbon dioxide will continue to rise and stabilize at a level to double pre-industrial (550 ppm) and an increase in global average temperature "only" 3 degrees is needed to halve current emissions CO2.
EU adopts measures to stop "climate bomb"
The European Commission unveiled on Wednesday a new set of proposals on oil companies to reduce their emissions of greenhouse gases resulting from the production, refining, transport and combustion of fuels. The Commission also proposed tougher standards on diesel quality commercialized block of 27 European countries, reports Reuters.
Regulations proposed by the European Executive aims to reduce by 10% of greenhouse gas emissions in the period 2011-2020. Thus, the EU objective for 2020 is lower carbon dioxide emissions by 500 million tonnes.
"This is one of the most important measures of a set of new initiatives to be implemented by the European Commission to combat a faster rate of global climate change," he said in a statement, European Commissioner for Environment, Stavros Dimas.
Proposals were presented every few weeks after the Government announced that it intends to take measures to reduce emissions by 30% of greenhouse gas emissions by 2020 compared to 1990.
Under the new regulations on fuel quality, diesel sulfur content will be limited to ten parts per million since 2009.
The European Commission also supports the use of an oil mixture containing up to 10% ethanol in a bid to promote use of biofuels.