Climate Letter #662

A record breaking heatwave in India.  This one could be worse than that of just one year ago, also in May, which was rated as the fifth deadliest in Earth’s recorded history.  Recent temperatures have reached 124F in one city, and close to that in others, including New Delhi.

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What humans are doing to the environment.  This very comprehensive UN study involved the work of over 1200 scientists and a vast amount of data. It serves as a detailed confirmation of estimates we have seen before about grossly excessive consumption  of resources.  Here it is expressed as a rate of damage far greater than the planet’s ability to make repairs.  The blame is mostly placed on developed countries which have for decades and centuries pursued economic growth at the expense of the environment.  (I see “economic growth” as something sacred in today’s world, like the cornerstone of a powerful religion, thus very hard to displace.)
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Emissions by ships and planes need to be reined in, as reported by Fred Pearce.  “Although these two sectors currently contribute 6 percent of all manmade CO2 emissions, they have managed to remain outside international control.”  Plans for changing that are in the making, but enforcement is not easy.
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The Haber-Bosch process for making nitrogen fertilizer accounts for another 3% of global emissions, with rapidly rising demands that need to be met.  It must also be replaced by something more friendly to the environment.  Fortunately there are people facing that challenge, and positive solutions may be in sight.
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How changes in Earth’s albedo are being measured.  There are two ways to do the measuring, and they tend to agree about small variations over a 16-year history of comparison.  Very little overall change has been detected during that period.  This will provide useful information over time but tells us nothing about how albedo changes have occurred in the past, like during the industrial era, or by comparing with conditions that existed throughout the ice ages and long before.  That information would give us a better handle on how to calculate the future effect of expected albedo change on global temperatures.
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The Himalaya region viewed from the air, in a short video.  This may be the most beautiful photography you have ever seen.
Carl

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