What scientists are now saying about the risk of explosive methane release (Yale e360). There was a time, not long ago, when a number of prominent climate scientists had genuine concerns about how rapid climate change might affect the gigantic deposits of stored methane around the globe. Nobody really knew the answer, which made room for some pretty dramatic and scary theories. That prompted an abundance of serious studies, which have been coming to the conclusion that there is no sign of a tipping point where today’s slowly rising release of methane might suddenly become very rapid or even explosive. The current rate is indeed dangerous, but we can still control its future extent. (The 6-minute video is worth watching.)
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A different kind of tipping point is real, and very close, this time favorable. Deloitte, a major consultancy firm (US$43 billion in revenues) based in London, has published a new report on the prospects for growth of the fully-electric automobile industry. A tipping point, where cost of ownership will fall below that of gas or diesel powered cars, will be reached in the next three or four years, setting the stage for explosive and unstoppable growth. This post has all the details, and even describes the models Deloitte favors for best value in many different classes.
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Electric automobiles also have a huge role to play in the future of the electric grid. The chief technology officer of an Australian fast-charging company describes the way automobiles and their big batteries, using fast-charging stations, can provide all the backup that is needed for solar-powered homes that will at times fall short. “There is 90kWh in a Tesla battery – that can power an average house for four to five days, including air conditioning…..Should it rain for a week and the battery gets depleted because of insufficient solar, an EV with vehicle-to-grid technology can simply be charged elsewhere, such as a supermarket or other infrastructure, and bring it back home to power the house.”
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A second report from last week links drought to declines in CO2 absorption by greenery. Oddly, the two reports were produced by groups at the same university, Columbia, and published on the same day but in different journals. The one received much immediate attention (see CL #1347) while the other has just now been reported, and quietly so. The message is essentially the same, but this one is more focused on fundamental details and has a more austere style that does not lend itself to publicity. From the conclusion, “our results highlight the importance of compound drought and aridity events and their impact on continental carbon uptake, and the need to consider these factors in evaluation of future climate change risks.”
https://phys.org/news/2019-01-extreme-frequent-drought-aridity-21st.html
https://phys.org/news/2019-01-extreme-frequent-drought-aridity-21st.html
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A new study examines the effects of climate change on on North America’s ice-covered lakes (Wisconsin Public Radio). “Already, thanks to climate change, about 15,000 lakes that used to reliably freeze each winter are starting to miss seasons. Even under the best circumstances, in which the global community meets the target set by the Paris climate agreement, the number of lakes with intermittent freezing will likely double by the time the climate warms by 2 degrees Celsius.”
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A critical look at Bolsonaro’s plans for Amazonian development (The Conversation). Only a few people want this, but who has the ability to stop him?
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