Climate Letter #521

Large corporations are turning to renewable energy mainly for economic reasons.  A trend has started that is sure to attract followers once confidence in trouble-free operation and actual positive bottom line results is credibly demonstrated.  This involves big chunks of electricity that are suddenly removed from the grid, and the potential for more of the same is staggering.

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Major acidification threat in the Southern Ocean.  Much of this material is familiar, but the post contains a 3-minute video that is nicely informative.
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New study shows net accumulation of ice over Antarctica.  The results, which are based on altimetry studies, are at odds with many previous calculations.  The story has been well-publicized, and quickly picked up by the denier community, but leaves some questions unanswered.  For one, it is not clear that the source of the ice has been from inputs of modern snowfall, but may instead have been from the congealing of ancient snowfalls.  How would that effect a rise in altitude?  Also, what would this result mean for explaining the measured trend of rising sea level?
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Mandatory follow-up proposed for Paris conference.  This is somewhat of a departure from the concept of strict voluntarism, but otherwise very logical and useful.  I find it especially interesting that the president of China was willing to join the president of France in advancing the proposal.  China is showing a surprisingly high level of seriousness toward participation in this entire process, and has the capacity to do much more than it has already promised.  This sets an example that cannot be overlooked by other countries.
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An update on the prospect of climate change mitigation based on existing pledges combined with the upcoming talks in Paris.  “The INDCs have the capability of limiting the forecast temperature rise to around 2.7C by 2100, by no means enough but a lot lower than the estimated four, five, or more degrees of warming projected by many prior to the INDCs.”  That is real progress, and there are viable ways to sustain the momentum.
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How will cars of the future be powered?  Here is an evaluation of the contest between electricity and hydrogen.  It’s interesting that the level of support for each from within the industry is so close.  I get the impression that future changes in technology, not yet established, could be the deciding factor, and for the moment would bet on substantial battery improvements as the most likely of such.
Carl

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