Climate Letter #376

Monthly CO2 report for March. About 2ppm over last year, which is a quite normal number these days, but the steady upward march in the air’s level continues. (It will only stop rising when emissions fall to zero.)

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New estimates of likely emissions from future permafrost thawing.  An important report involving 17 scientists has been issued. They estimate that between 5 and 15% of embodied carbon could be released by the thawing of northern permafrost expected in this century. A 10% release would mean 160 billion tons of carbon added to the atmosphere, which is equal to 16 years of the current rate of all human emissions. Logically, that number should then be subtracted from the “allowable” budget for future human emissions, which is now said to be less than 500 billion tons to keep us within the 2C temperature rise limit. The IPCC has not been accounting for any permafrost feedback emissions but that may no longer be tenable. For those who take these things seriously the squeeze is tightening, very much so.
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Continuing growth of extremely low-oxygen oceanic “dead zones.” This new report says they now constitute 10% of the world’s oceans, caused mainly by a combination of rising temperatures and agricultural runoff. The post contains a map showing the locations of these zones and provides a detailed discussion of the damage being done. Recovery is likely to take more than 1000 years.
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Bad report for Western Canadian glaciers. This study says they could lose as much as 95% of their ice by 2100. Less snowfall in the winter contributes to the decline as well as increased summer heat.
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An encouraging report about the growth of new woodlands. Surprising satellite data reveals that in spite of all the deforestation going on total woodland growth worldwide has increased since 2003. Its value is estimated to be worth 4 billion tons of captured carbon, which helps accordingly to offset human emissions..
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Added information about the value of flywheel storage technology. Their high level of efficiency and instantaneous adaptability should make today’s flywheels quite useful for any grid, especially one where the power sources are distributed.
Carl

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