Climate Letter #899

New studies show that surface meltwater in the summer is quite common around the edges of Antarctica’s ice sheet.  The extent of it has not been previously recognized.  In an interpretation of what this means, “Many of the newly mapped drainages are not new, but the fact they exist at all is significant; they appear to proliferate with small upswings in temperature, so warming projected for this century could quickly magnify their influence on sea level.”  Ideas about catastrophic collapse gain credibility from this information.

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An update on offshore wind turbine technology.  Primarily, the industry has become competitive without any need for subsidies, and future cost reductions look to be readily attainable.  In contrast, “Just three years ago, offshore wind was a fringe technology more expensive than nuclear reactors and sometimes twice the cost of turbines planted on land.”  Installed capacity, led by China, the UK and Germany, is expected to rise dramatically.
–Interesting sidelight:  Here is what it is like having a job servicing wind turbines, written by a very plucky lady, with a short video:
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Solar energy promoters are making plans for increasing the world’s capacity by 50 times in 15 years.  A high-profile group has published a scientific paper on how to tackle the challenges, seen as a real possibility.
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An ideological understanding of the climate mitigation mess.  The author of this piece makes a number of useful observations about how the current dilemma was reached and why it is so difficult to find solutions.  He can picture a quite different world, where humans live in harmony with themselves and with nature, which is quite reasonable in principle, but it challenges almost everything that motivates the modern lifestyle.
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A new problem has been identified that is caused by increases in the temperature of ocean waters.  “Increasing water temperatures are responsible for the accumulation of a chemical called nitrite in marine environments throughout the world, a symptom of broader changes in normal ocean biochemical pathways that could ultimately disrupt ocean food webs, according to new research from the University of Georgia.”   It also results in more production of nitrous oxide, a powerful greenhouse gas, as a feedback that adds more impetus to the warming.
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In this 4-minute video Neil deGrasse Tyson makes a plea on behalf of science in the so-called debate over the cause and effects of global warming:
Carl

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