For people interested in the theme of transitions in energy production, please check out Tim Lenton's excellent Oxford Talk on bio-energy with carbon capture and storage https://oxgeoeng.webex.com/mw0306ld/mywebex/default.do?siteurl=oxgeoeng Growing an Energy Source and Storing it's Waste<https://oxgeoeng.webex.com/ec0605ld/eventcenter/recording/recordAction.do?siteurl=oxgeoeng&theAction=archive>
The key takeaways, as I understood from this, were: 1. Former agricultural land offers a adequate area to grow energy crops on without affecting pristine ecosystems 2. Expansion of meat-intensive diets constitute a real threat to the ability of BECCS to make a meaningful contribution without damaging food supply or ecosystems 3. Use of BECCS on agricultural residues constitutes a 'quick win', without the costs of 'custom' cultivation 4. Carbon negative technologies generally impede sink efficacy and cause fluxes from sinks, as the pCO2 in the atmos falls. I hope I've got that all right! But if you watch the talks, you won't be relying on me :-) A On 18 February 2012 19:44, Nathan Currier <[email protected]> wrote: > Ken - > > I don't consider that far afield at all: I think it's 100% central to > what > this site should be about, since geoengineering and emissions > policies > need to be properly constructed together and be complimentary. > It looks great & I can't wait to read it in more detail. > Cheers, Nathan > > On Feb 17, 12:09 pm, Ken Caldeira <[email protected]> > wrote: > > Folks, > > > > The attached paper is a little far afield for this group, but it > indicates > > some of the challenges associated with reducing the amount of warming > that > > might occur this century through transformation of our energy system. > > > > Particles in the stratosphere change planetary radiative forcing very > > rapidly, whereas changes in emissions change the rate of change of > > radiative forcing, but do not substantially change radiative forcing on a > > short time scales. > > > > Furthermore, in, for example, a 40 year linear transition from coal to, > > say, solar power, only about 1/4 of the avoided emissions come in the > first > > 20 years while 3/4 of the avoided emissions occur in the second 20 years. > > If you combine this with lag times introduced by thermal inertia in the > > oceans, you can see that only rapid transitions to the lowest emitting > > technologies can have a substantial effect on climate later this century. > > > > The paper is "open access" and is also available here (along with > > supporting online material): > http://iopscience.iop.org/1748-9326/7/1/014019 > > > > We have also made a little YouTube video: > http://www.youtube.com/watch?v=a9LaYCbYCxo > > > > A journalistic account can be found here: > http://environmentalresearchweb.org/cws/article/news/48649 > > > > Best, > > > > Ken > > > > _______________ > > Ken Caldeira > > > > Carnegie Institution Dept of Global Ecology > > 260 Panama Street, Stanford, CA 94305 USA > > +1 650 704 7212 [email protected]:// > dge.stanford.edu/labs/caldeiralab @kencaldeira > > > > *YouTube:* > > Crop yields in a geoengineered > > climate<http://www.youtube.com/watch?v=-0LCXNoIu-c> > > Influence of sea cucumbers on a coral reef CaCO3 > > budget<http://www.youtube.com/watch?v=-FSd4zy8iMo> > > > > Myhrvold_Caldeira_ERL2012.pdf > > 2236KViewDownload > > -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/geoengineering?hl=en. > > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
