Climate Letter #401

Posted on May 14, 2015 by Carl Campbell
Improving solar panels with black silicon. “Black silicon is silicon with a highly textured surface of nanoscale spikes or pores that are smaller than the wavelength of light. The texture allows the efficient collection of light from any angle, at any time of day.” Manufacturing difficulties have held back development, but now researchers at Rice University say they have found solutions to the main problem and are almost ready for commercialization. This would be a huge step forward for collecting solar energy.

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New research on the results of permafrost thawing. Most of the buried carbon is being quickly converted to CO2 by microbes, and then released into the air, rather than being carried off by water and dumped into the sea. Climate models will need to be updated, in an unfavorable way, and the potential numbers for carbon release are indeed large. Those who are interested in feedback effects and tipping points should be quite interested.
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How rivers transport carbon, and how much. This report, which is educational in many ways, is related to the above story but is much broader and contains some new data. Rivers have a major role in the long chain of natural events that moves carbon from the Earth’s surface to a nearly final resting place deep in the oceans.
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Book review—“Dire Predictions,” by Michael Mann and Lee Kump. This is an update of the highly-regarded 2008 edition.
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Converting recycled CO2 into ethanol. (See Climate Letter #389 for a similar story, coming out of Germany.) Now a U.S. company claims it is also ready to produce ethanol on a commercial scale from CO2 through photosynthesis. If either one proves to be economically viable there would be multiple benefits, so this is certainly worth watching.

Carl

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