Climate Letter #1096

Ocean water heat content for 2017 has been released, the highest on record.  Accurate measurements down to 2000 meters have been made yearly since the late 1950s and are shown on a chart in this post.  There is no better way or describing how the outermost layers of the globe have been warming up, because that is where almost all of the bulk of any change in the amount of heat content is being stored.  Air temperatures follow this trend, but with some variance which largely depends on how much of the ocean’s heat is actually being manifested at the oceanic surface at any one time.  That’s where El Nino and La Nina effects become prominent, as explained in the story.

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How air pollution has helped to shield us from climate change.  This article refers to a recent study (see CL #1092) that reports a new measurement of this effect, with an explanation that makes it easy to understand the way it complicates the strategy for preventing a 2C temperature gain.  “This kind of air pollution, mainly in the form of sulfate particles, basically acts as miniature mirrors in the air. They reflect back some of the sunlight, cooling the Earth just like you can cool yourself by walking into the shade,” Samset told Futurism. “If we remove that, to clean up our air and reduce mortality due to respiratory and lung disease, we’ll also be giving global warming a boost, unfortunately.”  (That boost could total as much as 1.1C, and would happen as quickly as pollution particles clear out from the sky.)

https://futurism.com/pollution-artificially-shielding-climate-change/

–The idea of deploying an artificial sunscreen as a way to hold down temperatures is losing favor.  In theory it would be a way to compensate for the cooling effect that would be lost by eliminating the sulfate aerosols that are now in place as an uncontrolled pollution component.

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How plastic waste is affecting coral reefs.  Climate change has been getting most of the blame for killing coral reefs but new studies show that plastics are also heavily involved.  Each of these forces no doubt helps to worsen the effects of the other.
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Is making the needed transition to renewable energy while sustaining economic growth an easy thing to accomplish?  David Roberts has some doubts, as he explains in this publication from Vox.  It is quite possible that some sacrifices will be needed, but hardly anyone who is pushing for change, or just wants to see change happen, wants to confront this prospect.  You don’t often hear this message, because calling for sacrifice is not a popular thing to do in our present culture, and I admire David for putting it forth rather bluntly.

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