Climate Letter #316

The Keeling curve. If you are not too familiar with the curve and how it wiggles this short video should be helpful. Keeling himself is much-admired for the practical value of all he did.

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Renewable energy report from South Australia. This is happening in a country that today has completely retrogressive national policies, but which happen to be offset by conditions that are favorable to renewables in many regions. This can be repeated elsewhere, especially so when governments are supportive.
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A helpful sea level study. Global sea level is extremely difficult to measure with great accuracy, but methods for doing so keep being refined. This study concludes that the rate of change was overestimated in the last century, but is now more accurate. This means the best graphs should show a higher starting point for 1900 with clear signs of acceleration since about 1990, as the “Hay et al.” chart line does in this post. Based on what we know about the recent history of polar ice cap melting their theory makes good sense. It also supports the stepped-up pace of flooding observations made in coastal communities everywhere. Looking ahead, I further believe it adds weight to higher-end forecasts for the rest of this century.
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How effective is money spent on public relations? This post may offer some surprises, except that it does not deal specifically with campaign contributions, which ought to have its own category. The oil and gas industry is certainly not holding anything back.
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An explanation of “vapor pressure deficit” (VPD) and its effects. This phenomenon has an important basic role to play in the projections of climate science.
Carl

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