Climate Letter #703

Six new papers analyze the actual global cost of climate change up to the current time.  Many different kinds of harm are covered.  As expected, people living in the poorest areas are getting the worst of it.

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Widespread northern Siberia wildfires reported.  This is a region where permafrost and peatland are common, population is scarce, likewise news coverage.  Note the temperature anomalies of up to 40F, which have been in place for weeks.
You can see the temperature problem more vividly by visiting and exploring the reanalyzer site:
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A report on toxic algae blooms in freshwater lakes.  They are continuously increasing, because of the combination of rising water temperatures and nutrient runoff.  Both factors are largely out of control and likely to continue, with lake water temperatures often rising quite a bit faster than the air.
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The actual rise in human-caused global temperatures since 1900 is still being scrutinized and refined.  The main difficulty lies in how to properly separate out the slow-moving  effects of natural heating and cooling trends observed in Pacific ocean waters.  A new study finds a corrected answer of plus 1.2C for human-only warming since 1900, which would translate into a bit more than that with the starting point set back to before the Industrial Revolution.  That is not very helpful with reference to meeting the goals set in Paris.
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Improvements are coming for flow batteries.  A whole new class of materials that hold great promise have been identified by a research team at Harvard.  The main advantage of these materials is their abundance and low cost, with unlimited ability to scale up.  Flow batteries are ideally suited to stationary applications where size and weight do not matter, which is of great interest to power producers.
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Michael Mann relates his recent personal experience with climate change deniers.  Mann is a leading scientist who has become famous for his outspoken public approach to communicating, which has earned him an abundance of responsive attacks.  He knows as much as anyone about how deniers operate.
Carl

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