Showing posts with label IPCC. Show all posts
Showing posts with label IPCC. Show all posts

September 7, 2014

Latest IPCC Report - with a one word summary and a choice

You may have heard that the latest draft report from UN Intergovernmental Panel on Climate Change (IPCC) has been released. 
Here is a quick one word summary of the report. Irreversible. 
The catastrophic changes to our climate that we are voluntarily choosing to impose on our children — cannot plausibly be undone for hundreds of years or more.

Yes, we can still stop the worst — with virtually no impact on economic growth, as an earlier IPCC report from April made clear — but future generations will not be able reverse impact on our climate that we are too greedy or shortsighted to prevent through immediate action.
The report was leaked to the AP and others. That means we can see the unvarnished language.
The scientists want us to know that "currently observed impacts might already be considered dangerous", but it's the future we should be worrying about the most:
Continued emission of greenhouse gases will cause further warming and long-lasting changes in all components of the climate system, increasing the likelihood of severe, pervasive and irreversible impacts for people and ecosystems.
Translation: Continued inaction would be catastrophic and immoral.
The risk of abrupt and irreversible change increases as the magnitude of the warming increases.
Translation: The more we delay, the worse it can get.
Without additional mitigation, and even with adaptation, warming by the end of the 21st century will lead to high to very high risk of severe, widespread and irreversible impacts globally.
Translation: Future generations can't simply adapt to the ruined climate we are in the process of handing over to them. Either we start cutting carbon pollution ASAP or we should just stop pretending we are a rational, moral species.
But it is important to remember — "Irreversible Does Not Mean Unstoppable." The IPCC report makes it clear we can still stop the worst from happening, at a very low cost, but we have to start slashing emissions ASAP. Now. What are we waiting for? 

Humanity's choice (via IPCC): Aggressive climate action ASAP (left figure) minimizes future warming and costs a mere 0.06% of annual growth. Continued inaction (right figure) results in catastrophic and irreversible levels of warming, 9°F over much of U.S


May 15, 2014

We're Running Out of Time

Here's the key finding [from the  Intergovernmental Panel on Climate Change's most recent report]: The world has only about 15 years left in which to begin to bend the emissions curve downward. Otherwise, the costs of last-minute fixes will be overwhelming. 

"We cannot afford to lose another decade," says Ottmar Edenhofer, a German economist and co-chairman of the committee that wrote the report. "If we lose another decade, it becomes extremely costly to achieve climate stabilization."

[NYTimes]


April 17, 2014

Top 5 Actions from IPCC's Climate Action Plan

The world's top scientists have released the most important projections and action plan for global warming in history. Here are the top five actions from the IPCC Climate Action Plan. 

1) The world must phase-out of fossil fuels and a shift to clean energy investments. While global emissions are still growing, some modern and innovative economies have already beaten the trend - moving from dirty fossil fuels to renewable energies, proving it can be done
2) Substantial shifts in annual investment flows between 2010 and 2029 are required, i.e. cuts in fossil fuel investments of USD 30 billion per year, while more than doubling the investment in renewables. Delaying mitigation action now implies higher costs of action later, says the IPCC, while the co-benefits of actions taken now can outweigh their costs.
3) Urban areas are expected to triple by 2030. This is directly relevant to climate change as urban areas account for roughly 70% of global energy use and global energy-related CO2 emissions. Since much of this urban infrastructure will be built in the next 20 years, there is massive potential for smart infrastructure choices, combined with low energy codes in new buildings, retrofits of the existing housing stock and more widespread use of already existing technologies and efficiencies.
4) Forests, agriculture, and land use could become a net CO2 sink by the end of the century. They currently account for about quarter of global greenhouse gas emissions, and could become a net CO2 sink due to successful afforestation efforts, reduced deforestation, and better agricultural practices.
5) Energy efficiency offers massive potential and multiple benefits, as well as the need for improved demand side management. Of course it's vital to produce energy in a more sustainable way, but saving energy in the first place and avoiding unnecessary waste is even better.
And the report includes a surprisingly hopeful note:
The IPCC is clear that we can still keep global warming below the danger-threshold of 2 degrees C compared to pre-industrial levels, if we make bold and quick decisions towards deeper and faster cuts in emissions. Even keeping warming to 1.5 degrees C, as many developing nations have been urging, is not ruled out. 
Faith communities can make a difference. Did you know religious institutions are among the world's largest landholders? Faith communities own 7-8% of the habitable land surface of the planet, including 5% of commercially run forests worldwide.