Climate Letter #405

Last twelve months tied for warmest on record. That means when compared with any other twelve-month period. The ten warmest of such are listed here, all but one being quite recent. The oncoming El Nino effect should help produce many more of these records in the current year.

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Extreme rainfalls in the U.S. are becoming more and more common. Here is a review of several recent ones, along with some pertinent explanations. There is also an NOAA chart showing the number of extreme one-day events since 1910, with a clear uptrend in effect for the last forty years.
Here is a separate chart starting in 1895 showing a similar trend of annual precipitation for the lower 48 states:
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An explanation of how the upper atmospheric “hotspot” is formed. Scientists are excited because they finally found ways to overcome difficulties measuring this phenomenon. This post will help you understand how heat is transferred in the upper parts of the climate system, and all that it means. It shows graphically how there has been no pause in global warming for the troposphere, just as we already can show how there has been no pause in the deeper parts of the oceans.
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How global warming has harmful effects on old, tall trees, anywhere. This is nicely explained in biological terms (Darcy’s law.). Wetter conditions can offset the damage up to a point, but eventually these trees will prematurely die, then being ready to release their large stores of carbon. Shorter plants with less leaf surface are not as affected.
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Pakistan sets an example for the third world. This country plans to grow its economy and eliminate subsistence-level poverty while at the same time reducing its carbon footprint, by taking advantage of abundant solar resources. Who is helping them do this? China!
Carl

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