Climate Letter #1407

Climate change is likely to have considerable impact on food safety, placing public health at risk (Food Safety News).  That is the finding of a study published by the World Health Organization.  The numbers of people who currently fall ill or die from food poisoning is currently significant, and are likely to increase by significant amounts with higher temperatures, rainfall changes and deteriorating conditions for safe storage.

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A new study, with a focus in northern India, has found that anthropogenic aerosol impacts have a strong effect on extreme rainfall events much like climate change, but in an opposite direction.  Thus, aerosol reduction, which is badly needed for health reasons, would enable a greater frequency of extreme rainfall events, which have been seen to do great damage in the studied region.  This dilemma and its complications may have much broader implications.
–Hurricane Maria provides an example of the devastating impact of flooding due to record-setting rainfall accentuated by climate change in a part of the world that is not overloaded with air pollution (NPR):
https://www.npr.org/2019/04/17/714098828/climate-change-was-the-engine-that-powered-hurricane-marias-devastating-rains

Researchers have added widely to the knowledge of how oceans naturally transport carbon from the surface to the floor.  Their newly identified and/or calculated pathways close a significant gap.  The ocean sink has a vital role in the sequestering of excess carbon that is absorbed from the atmosphere, and there are concerns about the future stability of the process.  This information will be of help to those who are making studies which have a considerable effect on regular models that make climate predictions.
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There is a new, highly unfavorable report on the state of New Zealand’s environment (The Guardian).  Many serious issues are described, arising from a variety of human activities.  “All the issues in this report are made worse by climate change and that is why this government is so determined to take strong action…..The introduction of climate change legislation, establishing an independent climate change commission to guide emissions reductions, and the just transition to a low emissions economy are vital.”
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A better way to produce refrigeration has been identified.  A group of European researchers have found a way to replace the gases now widely used that cause highly polluting greenhouse effects when they escape into the atmosphere.  The new materials are inexpensive solids that have cooling effects similar to the gases when placed under pressure.  The report makes no statement having reference to energy demand, but preventing the greenhouse gas effect is much to be desired from products that are in such high and increasing demand globally.
Carl

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