Climate Letter #452

A summary of Alaska’s wildfire season and its terrifying effects.  This year’s rate of burning is ahead of the pace set during the record year of 2004.  The list of damaging effects goes on and on.   http://www.washingtonpost.com/news/energy-environment/wp/2015/07/26/alaskas-terrifying-wildfire-season-and-what-it-says-about-climate-change/

One of the more dangerous effects, involving the thawing of permafrost, where a huge amount of carbon is stored, is detailed in this post:  (My note:  It takes just over 2 billion tons of carbon to add 1 ppm of CO2 to the atmosphere.)   http://kvpr.org/post/beneath-alaskan-wildfires-hidden-threat-long-frozen-carbons-thaw

James Hanson comments in person on the new study his group published.  In an interview with Fareed Zakaria he does not back down from the hypothesis that sea level could rise as much as ten feet in the next fifty years, and then proceed to get much worse after that.  Bits of the interview are shown here, plus there is a link to the full transcript.   http://climatecrocks.com/2015/07/26/jim-hansen-on-sea-level-and-the-lifeblood-of-science/

A review of the Hansen paper by a popular science writer, Elizabeth Kolbert, published in the New Yorker magazine.  It emphasizes the need to seriously reconsider the commonly held perception that a global temperature increase of 2C represents a safe place to set a limit.   http://www.newyorker.com/news/daily-comment/a-new-climate-change-danger-zone

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A more thorough review of the Hansen paper.  This one is by Robert Fanney, aka “robertscribbler,” who has long been a favorite source of information for these letters.  Many of the key points are explained for the general reader with his usual great clarity.  Also, many of the commentaries that follow are helpful. http://robertscribbler.com/2015/07/24/warning-from-scientists-halt-fossil-fuel-burning-fast-or-age-of-superstorms-3-20-feet-of-sea-level-rise-is-coming-soon/

Giant US companies are making pledges to benefit the climate.  These thirteen together will spend at least $140 billion on new low-carbon investments, and more big companies will likely be joining them soon, all of them acting in coordination with new White House initiatives.  This is a bit of good news for the environment, but probably bad news for that long list of Republican deniers when they go out looking for campaign contributions from these companies.    http://thinkprogress.org/climate/2015/07/27/3684625/act-on-climate-pledges-announced/

Carl

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