Climate Letter #1439

Scientists find substantial links between sea ice variation in Hudson Bay and summer heatwaves in the lower US 48 states (Phys.org).  The statistical relationship is plainly evident.  The physical nature of the relationship, while less obvious, can be explained in a reasonable way through well-known mechanisms of atmospheric science.  This is a remarkable piece of information that helps to connect some of the far-flung dots of climate change.

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A summary overview of the consequences of adding an extraordinary amount of CO2 to Earth’s atmosphere (Skeptical Science).  This is why CO2 is called the ‘control knob’ of Earth’s climate.  Between 180 and 300 ppm there existed a long series of ice ages for a million years and more.  Above 300 everything changes, as we are now finding out.  The final changes that can be expected are not yet fully in place, nor have any species now living learned how to adapt to those changes.  Moreover, we are not yet finished with moving the control knob to an even more powerful position.  Don’t be surprised by the magnitude of changes that remain to be seen.
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A new report covers the effects of climate change on human health (Life Sciences).  The report was created by a consortium of 27 leading scientific academies in Europe.  It “presents strong evidence of the increasing and diverse risk posed to human health and life by the global increase in temperature.”  Recommendations are made with respect to the way we deal with these risks and also to the need for action that would avert even greater levels of distress in the future.
https://www.news-medical.net/news/20190604/Climate-change-adversely-affects-human-health-says-new-report.aspx
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A critique of policies based on the concept of ‘green growth’ (The Ecologist).  “Green growth has emerged as the dominant narrative for tackling contemporary environmental problems. Its supporters include the likes of the UN, OECD, national governments, businesses and even NGOs…..These groups believe that sustainability can be achieved through efficiency, technology and market-led environmental action. Green growth suggests we really can have our cake and eat it – both growing the economy and protecting the planet…..But when it comes to tackling the most pressing environmental problems such as climate breakdown, species extinction or resource depletion, green growth might weaken rather than strengthen progress.”  The journal goes on to explain why.  I believe their arguments are well-founded, and that the underlying elements of motivation are difficult to overcome.
https://theecologist.org/2019/jun/03/green-growth-wont-save-planet
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Along similar lines of thought, it is argued that nationalism and the way modern societies are structured impede the kind of cooperative effort need to combat climate change (Pacific Standard).  The collapse of Easter Island, as described by Jared Diamond, is used as an instructive example.  This essay has several other references, all of them thought-provoking. Are the suggested reforms even remotely possible?
Carl

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