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IPCC Climate Assessment 2013

Posted: September 27th, 2013 | Author: | Filed under: Climate Change | Tags: , , , , | Comments Off on IPCC Climate Assessment 2013

IPCC Climate Report 2013It 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 »»»»

Carbon Pollution at 3 Million Year High

Posted: May 23rd, 2013 | Author: | Filed under: Climate Change, Ecology | Tags: , , , , , , , , , | Comments Off on Carbon Pollution at 3 Million Year High

CLIMATE CHANGEGlobal 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 »»»»

Our Planet Hottest Since Human Civilisation

Posted: March 10th, 2013 | Author: | Filed under: Climate Change | Tags: , , , | Comments Off on Our Planet Hottest Since Human Civilisation

CLIMATE CHANGEEarth is on track to becoming the hottest it has been at any time in the past 11.3 millennia, a period spanning the history of human civilisation, a new study says.

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 »»»»

Antarctic Ice Sheets Melting Faster Than Previously Thought

Posted: December 29th, 2012 | Author: | Filed under: Climate Change, Ecology | Tags: , , , , , | Comments Off on Antarctic Ice Sheets Melting Faster Than Previously Thought

Antarctic Ice Sheets Melting Faster Than Previously ThoughtA study of temperature records over more than half a century shows the west Antarctic ice sheet is warming nearly twice as quickly as previously thought.

A re-analysis of temperature records from 1958 to 2010 revealed an increase of 2.4 degrees Celsius over the period, three times the average global rise.

The increase means west Antarctica is one of the fastest-warming regions on Earth, according to paper co-author David Bromwich of the Byrd Polar Research Centre.

“Records suggests that continued summer warming in west Antarctica could upset the surface balance of the ice sheet, so that the region could make an even bigger contribution to sea-level rise than it already does.” David Bromwich said :: Read the full article »»»»

Sydney Rat Race

Posted: August 11th, 2011 | Author: | Filed under: Applied Science, Ecology, Ecology, Favorite New Thought, Michael Courtenay, Outside the Box, Science, Science of Green | Tags: , , , , , , , , , , | Comments Off on Sydney Rat Race

Sydneysiders sometimes feel swept up in the rat race, but there’s a real rat race coming to bushland around Sydney Harbour when University of Sydney ecologists introduce native bush rats, called boguls.

Dr Grainne Cleary holding a native Bogul Rat

There is about to be a new twist on Sydney’s rat-race, this time involving a battle between real-life rodents. A native rat is being re-introduced to Sydney to give the introduced species a run for its money. Scientists from the University of Sydney will tonight release 100 Bogul Rats in the Sydney Harbour National Park, and at a sanctuary at Manly. Ecologist Grainne Cleary says once established it is hoped the bush rats will be able to compete with the black rat, which arrived in Sydney with the first European settlers. ”We’ve been killing black rats around the harbour so there’s big gaps where there’s no black rats, we’re putting the native bush rat in, the bush rat gets time to make it its home, find a place to live, find a place to eat. The black rats will then start invading, start to want to come in, there will be a bit of fight and we’re pretty confident that the true Aussie battler, the Bogul, will win out.” Dr Cleary says the bogul rat is also better news for Sydney’s human residents. She says unlike the black rat, bush rats do not generally get into homes and do not become a plague problem.

The trial starting this week will take place in 16 bushland locations from Mosman to Manly, with the aim of reinstating a native species and potentially reducing pest black rat populations as the boguls compete for territory and resources. The boguls will be microchipped and radio tracked to chart their movements over the next 18 months. Native boguls (Rattus fuscipes) were once common in Sydney but were wiped out after European settlement. Research led by Associate Professor Peter Banks and Dr Grainne Cleary from the University of Sydney’s School of Biological Sciencessuggests boguls may be able to out-compete black rats (Rattus rattus) in the race for territory. Read the full article »»»»