Climate Letter #381

Posted on April 16, 2015 by Carl Campbell
Growing prospect of a new record for global temperatures in 2015. The first three months have been reported as the hottest on record for that period, and the latest twelve months as well. What would seal the deal for all of 2015 would be a new El Nino event, the odds of which continue to increase. Note that the Southern Hemisphere still lags far behind the North as a contributor.

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Report of a significant new discovery of some basic information about El Nino development, but missing any news that would apply to the present outlook:
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An overview of the race to replace fossil fuel as the primary source of energy. It’s easy to get excited, or even complacent, because of all the progress being made by renewables, but when you properly assemble and crunch all of the numbers and put them in the proper perspective you quickly become much less comfortable. This post does just that. It’s quite clear that plenty of things still need to change—dramatically, and soon.
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Disturbing developments in the North Atlantic. There is a slowdown in the Atlantic overturning, probably caused by the outflow from melting glaciers on Greenland. One result is a persistent large patch of cold surface water, plus many more widespread effects. Stefan Rahmstorf, Jason Box and Michael Mann all have relevant comments in this post. “That is another example where observations suggest that climate model predictions are in some respects still overly conservative when it comes to the pace at which certain aspects of climate change are proceeding.”
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A review of Totten Glacier studies. Discovery of the melting activity under the Totten Glacier was one of the biggest climate stories reported in the past year.  Here is what some of the scientists involved have to say about it, both in the video and written material. They are not quite ready to say it is unstoppable, like the Pine Island group in West Antarctica, but another eleven feet of potential sea level rise is hanging in the balance.

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How to make trees grow bigger and faster. Scientists have found a way to make poplar trees grow twice as fast as they normally do, by modifying their genes. This could prove to be a useful way to remove more carbon from the atmosphere and to produce more biomass for making renewable fuels. Not a bad idea, and this is just a start.
Carl

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