A new study has important findings tied to the greening effect of higher CO2 levels (Los Alamos National Laboratory) Adding CO2 to the atmosphere helps make plants grow, even while temperatures are rising. However, rising temperatures produce more drought, which in some cases can be extreme, and extreme drought is very bad for plants. “Analysis shows that not only will droughts become more frequent under future climates, but more of those events will be extreme, adding to the reduction of plant production essential to human and animal populations…..For plants living through mild or moderate droughts, the situation is not as dire. The problem is that more of the droughts that come will be the extreme ones.” (There is no mention of how an uptick in wildfires might add to this effect.)
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–A separate but related study gets into the physiological details of how forests adapt to the combination of higher CO2 levels and less water supply. Some do it better than others. (University of California – Santa Barbara)
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A new UN report about the growth of greenhouse gases in the atmosphere shows deep concern (Carbon Brief). Emissions keep growing, with no sign of a peak, leaving the idea of a limited 1.5C increase virtually out of reach. “By 2030, the UNEP report estimates that emissions will be 27% and 38% higher than is needed to limit warming to 2C and 1.5C, respectively…..This means that while global emissions are still far too high to keep warming well-below 2C, very high emission outcomes with 4C or more warming are also increasingly less likely.” This review is full of information that explains the nature of the problem and what must now be accomplished in order to correct it.
–The Executive summary to the UN report, showing still more critical information, is available at this link:
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A wildlife conservationist has much to say about the current wave of mass extinctions (Mongabay). He recounts the history of human responsibility, beginning 70,000 years ago, and brings it up to date, with the current period being marked by an acceleration. He offers plenty of reasons for why we should care, mostly in relation to our own good.
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A new way to capture CO2 from any air or gas stream has been developed at MIT (Anthropocene). “Engineers at MIT have now created a device to trap carbon dioxide that is much less energy-intensive and costly than today’s technologies…..it could be used to scrub carbon dioxide from factory and power plant flue gases or even directly pull it from the atmosphere…..The system uses about one gigajoule of energy per ton of carbon dioxide captured. Other existing methods can use up to 10 times that much…..the electrodes should cost tens of dollars per square meter to produce, and could easily be made in large quantities using roll-to-roll processing techniques.” With further progress this could become exciting.
–The journal of publication has open access for this study, which is mostly quite technical. From its conclusion: “It is projected that further optimization of the ESA process can be obtained through refinement of the electrode chemistries and their assembly into compact adsorption devices to address a wide range of CO2 mitigation strategies.”
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