Sunday, February 3, 2013

Pay Now, Live later

Greetings Peaksters

   Ran across this interview on Ecoshock radio "with one of the lead authors of the new assessment. Dr. Steven J Davis is an Assistant Professor in the Department of Earth System Science at the University of California, Irvine. He's part of a team of scientists who reassessed the famous wedge theory of solving the climate crisis. Find that article "Rethinking Wedges"in the journal "Environmental Research Letters" published in January 2013."

    It illustrates the wisdom of  "A stitch in time saves nice"   If we has followed the original advice in 2004, we could have implemented a plan based on existing technologies, with reasonable costs   

    Ten years later, the cost went way up.

     Interesting discussion about the what was behind the original paper, and how the current authors  have a slightly different attitude.  The original paper came out when the Bush folks were saying, "Its impossible to cut that much carbon without crashing the economy"  So they showed how it could be done at a reasonable cost.  Now, we are way behind, and the cost would be a lot higher, and maybe we would need some new technologies.  There is some tension between the oid and new  authors as to whether "We can handle the truth"   - Would the truth make us be discouraged and give up?

Here's the abstract:

"Filling this many wedges while sustaining global economic growth would mean deploying tens of terawatts of carbon-free energy in the next few decades. Doing so would entail a fundamental and disruptive overhaul of the global energy system, as the global energy infrastructure is replaced with new infrastructure that provides equivalent amounts of energy but does not emit CO2Current technologies and systems cannot provide the amounts of carbon-free energy needed soon enough or affordably enough to achieve this transformation."

“The original study showed that we could have solved a large part of the problem with existing technologies,” says Caldeira. “But solving the whole problem now requires new technologies deployed at a massive scale

Emissions Cuts: Pay now, live later
January 11, 2013 in Mitigation
EMBARGOED until 0001 GMT on Friday 11 January
By Tim Radford
Our failure to act to reduce greenhouse emissions has imposed a much bigger bill on future generations, US scientists argue, and the technology we have today cannot do the job.
LONDON, 11 January – A nine-year delay in starting systematic carbon emission reductions to stabilise the climate has made the challenge ahead almost impossibly large, US scientists say.
They argue in Environmental Research Letters that a programme of action proposed in 2004 could have been achieved with existing technology. Now it cannot.
“We need new ways to generate the vast quantities of power that we now use worldwide,” says Steve Davis of the University of California Irvine, one of the authors. “Current technologies cannot provide this much carbon-free power quickly enough or affordably enough.”
Ken Caldeira is a climate scientist working for the Carnegie Institution Department of Global Ecology at Stanford University in California. He says: “It’s not enough to freeze greenhouse gas emissions at current levels. To prevent climate change, we need to stop dumping carbon dioxide into the atmosphere at an industrial scale.”
In 2004 two Princeton University scientists argued in Science magazine for a new way of thinking about the action that needed to be taken. They suggested that governments could usefully divide the challenge of carbon emissions reduction into seven “wedges” – seven manageable slices, each of which involved a slow start but which would, after 50 years, reduce carbon emissions by a billion tonnes a year.
What that means is that each wedge, or plan of action, would after five decades account for 25 billion tonnes of carbon not released into the atmosphere. This could be done, they said, by doubling the number of nuclear reactors worldwide, increasing automotive fuel efficiency dramatically, and so on.
New technologies are essential

But no such systematic decisions were taken; richer nations continued to burn fossil fuels, while the developing world began swiftly to catch up.
In the latest study, the scientists revisit the Princeton proposal and argue that, simply to achieve the same “business as usual” emissions level proposed in 2004, governments would now need to deploy 12 “wedges” instead of the original seven.
But to stabilise emissions at the levels they have reached in 2013 governments would need another nine wedges. To cut emissions to the level needed to prevent climate change, they would have to deploy a further 10 – a grand total of 31 such wedges to stabilise the world’s climate by reducing carbon emissions to almost zero.
“The original study showed that we could have solved a large part of the problem with existing technologies,” says Caldeira. “But solving the whole problem now requires new technologies deployed at a massive scale.” – Climate News Network


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