Climate Letter #708

What is the state of glacial melting in the Himalayas?  Here is a fine report, with beautiful photographs.  The well-being of more than one billion people is threatened.

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The impact of agriculture on greenhouse gas emissions.  Control over global warming involves much more than stopping the burning of fossil fuels.  Food production causes other kinds of emissions, worth about 30% of the total warming power, and the demand for food keeps rising inexorably.  As it stands, this source of greenhouse gas will use up every bit of the remaining carbon budget under the 2C limit.  This report contains new information that comes from a blue ribbon research group.  It will need to be incorporated into the total framework of discussions and negotiations that are seeking solutions.
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Scientists are raising serious questions about the Paris climate goals.  This story has broad inputs into this issue, based on a number of recent publications.  Example:  Do we have a clear understanding of the difference between a world at 1.5C and at 2.0C?  Or, “Are we confident that exceeding 1.5C, even for a limited time, is safe and reversible?”  Just staying below 2.0 is unlikely without a radical change in policy-making, and scientists need to beef up the reasons in ways that policy makers will find impossible to ignore.
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Major improvements reported of lithium-oxygen battery construction.  Apart from several serious drawbacks, these batteries have huge advantages over the conventional lithium-ion type.  A change in the mode of construction is claimed to have eliminated all of those drawbacks, as credibly reported from sources at MIT.  A practical prototype should be ready within about a year.  “….they could be easily adapted to existing installations or conventional battery pack designs for cars, electronics, or even grid-scale power storage.”  Good job.
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A new class of customers for wind energy is emerging in the US.  It is made up of giant corporations and other major wholesale customers like cities and universities, under long-term contracts with independent producers, at favorable rates which have been falling.  Growth in this sector has accelerated.
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New findings about a key oceanic carbon sink.  This story will give you a clear picture about how hard-shell plankton can permanently transfer carbon to the ocean floor when they die.  We also learn how and why the process is most efficient when the water is coldest.  There is a warning that this particular sink will be weakening.
Carl

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