Climate Letter #724

Disastrous climate is here for the world’s sixth most populous country.  Pakistan is among the very worst-suffering of nations, is one of those least responsible for causing the present climate condition and has some of the relatively fewest resources available to deal with current problems. Tens of millions of people are affected.  The country needs help.

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Scientific American weighs in on the antiscience political movement, as it certainly should.  The trouble is, the magazine’s audience is largely made up of people who are already in agreement, with little influence beyond that reach.  There is a special question involved here—why is this happening?  Why does such a ridiculous phenomenon keep growing, impervious to criticism?
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A potentially contradictory story about tropical cloud cover?  Yesterday I reported research which claimed that low-level tropical clouds were diminishing, causing an extra warming effect.  Today it is reported that mid-level tropical clouds are becoming more ubiquitous, and having a cooling effect.  Can they both be right?  It’s theoretically possible, but some clarification is certainly called for.
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Talk about the problems of holding temperatures under the 1.5C target is getting more real.  For one thing, we got a taste this year of what it’s like to hit 1.5, even if only briefly, and yes, now we know that level really is dangerous. There is also more realism about the existence of political inertia and fakery, in addition to outright resistance.  Maybe not enough is being said about the amount of heat that is already in the pipeline and has yet to have an impact, or the heat yet to be gained because of the current long-life energy imbalance, before any further addition of greenhouse gas.  And we need more open admission about the indispensable need to radically interfere with the current usage of fossil fuels in countries that are fully developed, such as by enacting stiff carbon taxes.
Here is a story that begins with some figures about the amount of heat in the pipeline that will be realized, with a helpful video.  It goes on to explain why this factor must be accounted for in all discussions related to urgency.
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Some amazing scientific detective work.  Scientists can now closely tell when an area of ocean floor was overlain by sea ice, going back even millions of years, by taking sediment cores and looking for the presence of certain species of diatoms at different levels.  This will be very helpful for both reconstructing ancient climate history and predicting the timing of future ice sheet breakdowns.
Carl

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