What is happening to the planet’s boreal forests, from National Geographic. The focus of this troubling report is mainly on the damage done by wildfires, but you will also get a broad education about this enormous habitat for life and the rapid way it is changing. Highly recommended.
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A new finding helps to explain the rapid warming of the Arctic. Measurements show how tiny algae that turn pink cut the reflectivity of ice and snow by 13% during the melt season. As temperatures grow warmer the density of these organisms increases. The effect was found at 40 sites, widely spread around the Arctic region.
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A warning about the possibility of a faster rate of temperature increases in the future. This story, based on new research from the Niels Bohr Institute, is perhaps not too clearly written, but the main conclusion does come through clearly. That is, we should expect the climate’s sensitivity, or rate of response to changes in the CO2 level, to speed up as the temperature rises. This idea comes from an analysis of what has been learned about the circumstances behind the rapid temperature increase during the PETM, 56 million years ago. It simply warns us that the risk from continued burning of fossil fuels is even greater than we thought.
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An update on drought conditions and expectations in the American Southwest, by Robert Fanney. His sources of information are all documented. I urge you to watch the short NASA video at the beginning. Later in this century the deep drought conditions are projected to extend over far more territory, even southward all the way to the upper edges of South America.
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A bullish forecast for the commercial development of tidal power systems. This comes from a turbine manufacturer who sees a considerable market opportunity beginning to open up.
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A quick update about gigantic wind turbine blades. For a good indication of what their size is really like, here is a picture of the new record world’s longest blade, 290 feet, just as it emerges from the factory, plus another taken from within.
Carl