JoNova

A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).


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Global warming will weaken winds in the Northern Hemisphere, but speed them up downunder!

Now they tell us! Climate warming to weaken wind power in northern hemisphere, increase in Australia: study

After building 341,000 wind turbines, mostly in the Northern Hemisphere, now climate modelers reveal that winds will decrease in the Northern Hemisphere!

Warming temperatures caused by climate change are set to weaken wind energy in the northern hemisphere, a study shows, lessening the amount of wind power produced for wind farms.

However the southern hemisphere would see a boost in wind, which could potentially turn north-eastern Australia into an attractive investment for energy companies.

Rush, invest your money now.  The theory called polar amplification has the success rate of a coin toss. Buy a wind farm in NE Australia!

Luckily wind speeds are not also influenced by cloud cover, jet streams, oceans currents, forest growth, atmospheric tides, solar factors, magnetic fields, ozone levels, cosmic rays, or butterflies. Otherwise this study might be inadequate, uninformed guesswork being used to inform investment decisions!

Look out for Polar Amplifiers. Click to enlarge.

Key points: Atmosphere instability which creates wind changing in northern hemisphere North-east Australia could become an attractive investment for energy companies At present there is only one operational wind [...]

Do forests drive wind and bring rain? Is there a major man-made climate driver the models miss?

Clouds over Amazon forest (Rio Negro). Image NASA Earth Observatory.

What if winds were mainly driven by changes in water vapor, and those changes occurred commonly in air over forests? Forests would be the pumps that draw in moist air from over the oceans. Rather than assuming that forests grow where the rain falls, it would be more a case of rain falling where forests grow. When water vapor condenses it reduces the air pressure, which pulls in more dense air from over the ocean.

A new paper is causing a major stir. The paper is so controversial that many reviewers and editors said it should not be published.  After two years of deliberations,  Atmospheric Chemistry and Physics decided it was too important not to discuss.

The physics is apparently quite convincing, the question is not whether it happens, but how strong the effect is. Climate models assume it is a small or non-existent factor. Graham Lloyd has done a good job describing both the paper and the reaction to it in The Australian.

Sheil says the key finding is that atmospheric pressure changes from moisture condensation are orders of magnitude greater than previously recognised. The paper concludes “condensation [...]