Completion of an exciting new ice core has been announced. This one, drilled in Antarctica, was able to track ice that was 2.7 million years old, far older than any previous core could achieve. The information that follows should be of great interest. So far we only learn that no CO2 sample has been recovered higher than 300 ppm.
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An expert appraisal of how the record temperatures of 2016 affected various long-term trends of change. The most important seems to be that droughts and flooding both keep getting more extreme. Also, the number of extreme weather events of all kinds keeps growing, which of course includes deadly heat waves. Everything was exaggerated in 2016 because of the El Nino event but this year will not be far behind.
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Statistics on the numbers of people subject to internal displacement in 2017. So far the total is 9.1 million, about half due to conflicts and half to extreme weather events, many of which do not get recorded. There is a continuing trend of increased large-scale displacements linked to climate change, with this year beating out 2016.
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A clear statement of the reasoning behind the position taken by “limits of growth” advocates. I am sure this will be hard for many people to swallow but still should be kept in the back of one’s mind just because so much of it makes sense. Climate change is certainly just one of a whole set of harsh insults to the environment, and thus cannot be greater than the full set, here called “overshoot,” but it could still be deemed the most critically dangerous of all the individual parts.
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How clouds have an influence on climate change (Yale e360). Interview with a scientist who works in this field of study. She observes that all clouds have either a positive or negative effect on warming but how to measure the exact overall balance between the two remains undetermined. Different model runs show that such changes would be seen to have important effects if they were known. One thing known is that the actual observed global warming trend causes a trend of change in overall cloud formation that is both upward and poleward, which has effects that abet more warming as a feedback.
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Carbon emissions from the US have dropped 14% since peaking in 2005. Carbon Brief provides a thorough analysis of all the different factors behind the decline, backed by many easy-to-read charts. While many of these trends will continue it is noted that the current rate of reduction “is not sufficient to meet the commitments it made under the Paris Agreement. It is also much too slow to avoid more than 2C of warming since the pre-industrial era.”