Climate Letter #1552

The long-term link between peatland drainage and greenhouse gas levels is quantified, and the numbers are troubling (Nature Climate Change).  This is an important study about the past and future projected pace of peatland drainage over the entire globe, which results in steadily reduced capacity for greenhouse gas absorption and considerably increased emissions having human causes.  I can only show you the abstract, and there are no news releases in English except for an announcement by Carbon Brief.  That’s odd because the journal of publication is known to be one of the best.  The subject matter is something that has not been openly accounted for by the IPCC or in any UN action.  In brief, “In 1960 the global peatland biome turned from a net sink into a net source of soil-derived GHGs. Annual back-conversion of most of the drained area would render peatlands GHG neutral, whereas emissions from peatland may comprise 12–41% of the GHG emission budget for keeping global warming below +1.5 to +2 °C without rehabilitation.”  The budget numbers are similar in scale to what we hear, far more often, about the consequences of permafrost thawing.  Of the two, peatland drainage is more capable of being stopped, if anyone pays attention.

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A new study provides improved understanding of why the Arctic is warming so rapidly (BBC News).  “A loss of snow and ice cover are the main reasons for a reduction in the Arctic’s ability to reflect heat, not soot as had been previously thought…..The Arctic region has warmed significantly since the 1980s, up to three times as much as the average seen elsewhere across the globe.”  The albedo effect is an important reason, having a number of different possible causes, all well-explained in this story.
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Hurricanes in North America have become more powerful and destructive in the past century, thanks to climate change (University of Copenhagen).  According to a new study, “the worst of them are more than three times as frequent now than 100 years ago. A new way of calculating the destruction, compensating for the societal change in wealth, unequivocally shows a climatic increase in the frequency of the most destructive hurricanes that routinely raise havoc on the North American southern and east coasts.”  The researchers had to find a better way to measure physical damage as if the circumstances on the ground were always the same before each storm hit.
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Bangladesh plans to build 29 new coal-fired power plants in the next two decades (Reuters).  Few countries are more exposed to catastrophic effects from climate change, and the people are not ignorant about the underlying reasons, so how can this be possible?  Basically, “Bangladesh had no choice but to burn coal…..Bangladesh’s economy is growing fast and it needs energy. That’s the bottom line. We don’t have the ‘hydro’ option like other countries and our gas is depleting…..Bangladesh had the potential to generate solar energy, but a shortage of space for solar panels would hinder widescale solar projects.”  So—couldn’t a 10% annual growth rate be slowed a bit?
–Meanwhile, why does Norway, a global leader in climate action, keep drilling more oil wells? (The Guardian).
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Record-breaking fires in Brazil’s Pantanal wetlands get little attention (Deutsche Welle).  “The number of fires in Pantanal has broken all records this year, with over 8,000 registered. In September, the authorities in Mato Grosso do Sul said that so far this year 1.3 million hectares had burned down and that a state of emergency had been declared in the region…..the world media does not seem as interested in these fires as in those that ravaged the Amazon.”  Otherwise, the causes and effects are very similar.
Carl

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