Scientists Issue Starkest Warning Yet With 5th IPPC Report on Earth's Climate

Search form

Scientists Issue Starkest Warning Yet With 5th IPPC Report on Earth's Climate

Scientists Issue Starkest Warning Yet With 5th IPPC Report on Earth's Climate
Mon, 9/23/2013 - by Robin McKie
This article originally appeared on The Guardian

Scientists will this week issue their starkest warning yet about the mounting dangers of global warming. In a report to be handed to political leaders in Stockholm on Monday, they will say that the burning of fossil fuels and deforestation have now led to a warming of the entire globe, including land surfaces, oceans and the atmosphere.

Extreme weather events, including heatwaves and storms, have increased in many regions while ice sheets are dwindling at an alarming rate. In addition, sea levels are rising while the oceans are being acidified – a development that could see the planet's coral reefs disappearing before the end of the century.

Writing in the Observer ahead of the report's release, the economist and climate change expert Lord Stern calls on governments to end their dithering about fossil fuels and start working to create a global low-carbon economy to curtail global warming. Governments, he states, must decide what "kind of world we want to present to our children and grandchildren".

The fifth assessment report on the physical science of climate change by the Intergovernmental Panel on Climate Change (IPCC) warns that humanity is on course over the next few decades to raise global temperatures by more than 2C compared with pre-industrial levels. Such a rise could trigger the release of plumes of the greenhouse gas methane from the thawing Arctic tundra, while the polar ice caps, which reflect solar radiation back into space, could disappear.

Although the report does not say so, Earth would probably then be facing a runaway greenhouse effect.

The scientists' warning – the most comprehensive and convincing yet produced by climate scientists – comes at a time when growing numbers of people are doubting the reality of global warming. Last week, the UK Energy Research Centre (UKERC) published a survey showing that the proportion of British people who do not think the world's climate is changing has almost quadrupled since 2005.

Asked if they thought Earth's climate was changing, 5% of respondents said "no" in 2005, a figure that rose to 11% last year and reached 19% this year.

But as the IPCC report underlines, scientists are becoming more and more certain that climate change poses a real danger to the planet.

Many believe the disconnection between popular belief and scientific analysis has been engineered by "deniers" explicitly opposed to the lifestyle changes – including restrictions on fossil fuel burning – that might be introduced in the near future.

"There are attempts by some politicians and lobbyists to confuse and mislead the public about the scientific evidence that human activities are driving climate change and creating huge risks," said Stern.

"But the public should be wary of those who claim they know for certain that unmanaged climate change would not be dangerous. For they are not only denying 200 years of strong scientific evidence – the overwhelming view of the world's scientific academies and over 95% of scientific papers on the subject – but they are often harbouring vested interests or rigid ideologies as well."

The report will be discussed this week by political leaders meeting in Stockholm. The study – the work of more than 200 scientists – outlines the physical changes that are likely to affect Earth's climate this century.

Future reports will cover the social impact of these changes and the efforts required to offset the damage caused by global warming. A United Nations meeting in Paris in 2015 will then debate what actions are needed to mitigate climate change.

According to the new report, humanity has emitted about half a trillion tonnes of carbon by burning fossil fuels over the past 250 years, a process that has caused atmospheric carbon dioxide levels to rise by 40%. The world is now on target to release another half trillion tonnes in the next few decades which could trigger a major jump in global temperatures.

Most measures that have been proposed for tackling global warming rely on curtailing the burning of fossil fuels and these will form the focus of the 2015 UN meeting in Paris. Given the poor record of previous summits, many are pessimistic an agreement can be reached.

However, other measures have been suggested to curb global warming. In particular, many scientists have backed geo-engineering projects that would involve either spraying particles into the atmosphere to reflect solar radiation back into space or extracting carbon dioxide from the atmosphere in order to bury it in mines or depleted oil fields.

Both suggestions get short shrift in the new report: atmospheric aerosols could have widespread side-effects that could produce major disruptions to weather patterns, while not enough is known about the effectiveness of carbon dioxide extraction or burial. "We have to face up to the prospect of weaning ourselves off our addiction to oil and coal," said one report author. "It is as simple as that."

Originally published by The Guardian

Article Tabs

The widening gap between the wealthiest Americans and everyone else has been matched by a slowdown in state tax revenue as the very rich shield their income from taxes.

Catholics from as far as Florida and Argentina are coming to New York "to indicate our prayerful support of God’s creation."

Nine out of 10 Latinos support government taking action to combat the threat of climate change – and 56 percent of Latinos see climate change as an extremely or very serious issue compared to 43 percent of all voters.

The history of resistance movements shows that when 3.5% of a population mobilizes on an issue, no government can withstand it – and organizers hope the climate justice movement can reach that level.

This weekend I won’t be marching for the climate, but I won’t be sitting around doing nothing either – I’ll be at the sixth annual Australian Climate Action Summit in Queensland delivering some inconvenient truths.

Britain’s political system is broken to the point where many people in Northern England actually want to join Scotland to escape austerity measures.

Posted 6 days 12 hours ago

Organizers haven't been shy about their underlying intentions: using the September march in Manhattan as a platform on which to build an international environmental social movement unlike any previously seen.

Posted 3 days 13 hours ago

Shifting toward community-based renewable power is a strong thread running through Scotland's Radical Independence Campaign, and a free Scotland could inspire other countries to relinquish their fossil fuel addiction.

Posted 2 days 8 hours ago

In addition to speaking with a common voice on climate justice and the policies needed to achieve it, today's "movement of movements" needs to reach beyond environmentalists.

Posted 6 days 12 hours ago

The latest misguided move by regulators could result in serious collateral damage to cities – maybe serious enough to finally propel them into bankruptcy.

Posted 6 days 12 hours ago

While UT Austin football coach Mack Brown wants to pay athletes for playing ball at a public university, institutions of higher learning across the country face budget cuts.

A Constitutional Case Against Felony Voter Disenfranchisement Laws

Obama’s recent court victory on early voting may have carved a legal path for fighting down felony disenfranchisement laws.

As news of more than 100 arrests at a Wisconsin singalong attracts statewide attention, the governor's approval rating has taken a plunge.

On Monday, 80 protesters with Utah Tar Sands Resistance halted access to equipment where the company seeks to begin work on the first fuel-producing tar sands mine in the state.

Sign Up