http://ccc.atmos.colostate.edu/pdfs/Pielke-etal_BAMS_Jun07.pdf

Look especially at Figure 4 and the section it is in.

http://ams.confex.com/ams/pdfpapers/102322.pdf

Seems to show that homogenization by bias skip elimination works great.

Note that the method apparently tested here differs from the Menne et al. “difference of means” as used for HCN v2, and corresponds to their “non-production” method. If I understand this correctly, that is.

http://ams.confex.com/ams/pdfpapers/102322.pdf

Note that the method apparently tested here differs from the Menne et al. “difference of means”, and corresponds to the “non-production” method of pairwise comparison.

Uh, lubrication makes it easier. Doesn’t mean it won’t happen without it: push a door hard enough and it WILL close, even when it’s rusted and unlubricated.

And your last point indicates that Venus had plate tectonics in the past.

Plate tectonics requires water, it helps to alter oceanic crust to produce serpentine, a phyllosilicate that ‘lubricates’ subduction.

Venus stopped having earth-like plate tectonics, but still has (apparently) sufficient internal heat to support it.

So when you said:

“Possibly so, but Venus lacks both liquid water and organic chemicals.”

You weren’t discussing Terra, were you.

And all that’s needed for plate tectonics and abiogenesis if they ARE linked is a molten core for several billion years.

Mars had one of those, ergo no problem for Mars. I don’t *know* about Venus, but its early history could easily have had billions of years with plate tectonics.

They lack it NOW, but then 1 billion years ago, there may have been life on those planets whilst ours had had its reset button pushed by the creation of the Moon and so was 1 billion years behind.

And water from cometary impacts is how the moon has any water at all. Pity there’s no atmosphere to stop the daylight evaporating it out into space.

Thanks. I was looking for something specifically about the homogenization of data sets, so that we can examine Watts’s claims.