The scientific community is stunned by research which backs an Australian Aboriginal legend on how coastal palm trees got to Central Australia. Tasmanian ecologist Professor David Bowman did DNA tests on palm seeds from the outback, and his conclusion is startling :: Read the full article »»»»
Australia has just sweltered through its hottest year on record, according to the nation’s Bureau of Meteorology. Average temperatures were 1.20 degrees Celsius above the long-term average of 21.8C, breaking the previous record set in 2005, the bureau says in its Annual Climate Statement.
The country recorded its hottest day on January 7 – a month which also saw the hottest week and hottest month since records began in 1910. A new record was set for the number of consecutive days the national average temperature exceeded 39C – seven days between January 2 and 8, 2013, almost doubling the previous record of four consecutive days in 1973 :: Read the full article »»»»
It may have all but been leaked, massaged and misquoted in the months prior to today’s release, however the United Nations’ Intergovernmental Panel on Climate Change – IPCC – report remains by far the most important climate report card on the planet.
More than 600 scientists contributed to the report, which is the result of almost seven years work by climate scientists and policy-makers. It’s based on more than 50,000 contributions from around the globe, and an exhaustive peer review process.
Long-term global temperatures are rising, Arctic ice is shrinking, permafrost melt is increasing, and sea levels are rising. The United Nations’ chief science panel also says it is 95 per cent certain that humans are behind the planet’s rising temperatures. According to the IPCC, the report is a conservative outlook.
While average land and sea temperatures will continue to rise, the report suggests the planet is heating at a slower rate than previously predicted. The worst case scenario is for a sea level rise by almost 1 metre, and temperatures could rise by around 2 degrees Celsius.
The IPCC panel says mankind needs a carbon budget if we are to restrict a rise in temperatures, the report predicts that since industrialisation we’ve emitted more than half a trillion tonnes of carbon dioxide, by 2040 we’ll have doubled those emissions :: Read the full article »»»»
Global greenhouse gases in the atmosphere have reached an ominous milestone that is unprecedented in human history. The world’s longest measure of carbon dioxide in the atmosphere has reached 400 parts per million for the first time in three million years.
The daily CO2 level is measured at the Mauna Loa Observatory in Hawaii, which tracks greenhouse gases in the Northern Hemisphere. The level has been measured at Mauna Loa since 1958, with data before that taken from ice core samples.
The last time it reached this level, temperatures rose by between three and four degrees and sea levels were between five and 40 metres higher than today. Still sceptical? :: Read the full article »»»»
Based on fossil samples and other data collected from 73 sites around the world, scientists have been able to reconstruct the history of the planet’s temperature from the end of the last Ice Age around 11,000 years ago to the present.
They have determined the past 10 years have been hotter than 80 per cent of the past 11,300 years.
However virtually all the climate models evaluated by the Intergovernmental Panel on Climate Change predict Earth’s atmosphere will be hotter in the coming decades than at any time since the end of the Ice Age.
This finding is resolute no matter what greenhouse gas emission scenario is used, the study found :: Read the full article »»»»