Climate Letter #1128

From WWF, a new projection for losses of biodiversity expected from climate change.  Outcomes will differ in different parts of the world, and in all cases rise sharply with every increase in the degree of global temperature rise.  For example, “If countries lift their efforts sufficiently to reach the 2C goal, the outlook is improved – but still grim – with more than 35% of species at risk of local extinction in the ((Amazon)) region.”  At 4.5 degrees the losses would be staggering.  This is why the “sixth extinction” model is a realistic vision of the future in the absence of a strong mitigation effort.

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Fresh meltwater from Greenland’s glaciers is having a weakening effect on deep circulation in the North Atlantic.  Researchers now have evidence based on data collected from long-term observations.  This tends to support those who fear an eventual shutdown of the operating Gulfsteam and its normal benefits to the climate of Europe.
–Interestingly, a totally separate research group also found a dramatic decline in North Atlantic salinity but had other ideas about the nature of the cause.  They also expressed fears that freshwater influxes from the Arctic Ocean may soon be forthcoming, further reducing salinity.
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A comprehensive type of study shows that the rate at which the arrival of spring season is advancing is much faster than realized.  In just the last decade the advance (on average) has increased progressively by four days for each ten degrees of latitude north that one might move, starting from the US South.  That was on top of gains made in the previous 86 years.  “Such signs include birds migrating, flowers blooming, amphibians calling and the emergence of leaves.”  The evidence of acceleration in polar regions is indeed startling.
–Perhaps paradoxically, this pattern and its differential setup does not prevent strong and nasty storms from developing in late winter in regions like the US Northeast:
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Facing the biggest obstacle on the road to deep decarbonization—a highly intelligent presentation from BNEF by Michael Liebreich, covering thorny questions about the quest for new approaches to the supply of major heating needs.  We don’t yet have all the answers like those now visible for electric power generation and transportation but there are plenty of opportunities to focus on.
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Energy consumption in millions of buildings may soon benefit from changes in the way retrofitting is financed.  It’s all a matter of building confidence that attractive savings will safely materialize over long time periods.  Underwriting standards have improved enough to merit the earning of low rates on substantial amounts of capital.  “In many cases, the projects look too small to be of interest to investors. ICP changes this by providing standards to build confidence that a project will perform as anticipated in the form of lower electricity bills, higher energy savings and returns on investment.”
Carl

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