Jim said:
I agree that moisture
content itself has little impact on the buoyancy of air even under the
best of conditions, ....... convention loop.

This is not so, moist air is less dense than dry air

2 or 3 times each year mid spring, midday the weather is
such that a hang glider can 'thermal' on moisture lift
The 'thermal' is quite weak(1-200 fpm), longlasting, homogeneous
and there is NO turbulence. Usually it tops out at 25-3000 AGL
(or at least this is where patience runs out, its fairly boring)

Back to the bees, I'm sure that this is enough energy
between this and heat to drive a circulation loop.

Dave

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