global warming is not human caused paper

[syberberg]

No worries isenhand.

[MisterE]

Perhaps I could weigh in on the Mars thing because I'm supposed to know some astronomy?

There are natural 'climate cycles' here on earth which are to do with:
1. the Sun (eg sunspots every 11,22, hundred-and-something years)
2. our eccentric orbit/ polar precesion etc (eg polar precession every 26,000 years and others, whose sum-total gives the milankovich 100,000 year cycle)

On top of these is superimposed, what we're doing to the planet.

OK you can see that 1. but not 2. would also have some influence on Mars. Mars will probably have its own equivalent of 2. which (my guess) is the cause of its polar alternating thang.

Right, back to the sun. Its output has been being measured, fairly reliably, for decades. Both from the surface (the chaps who discovered Global Dimming used irradiance time-series) and from space (no dimming, natch).

The upshot: These latter (space-based Sun data) have shown no change which could account for global warming all by itself: we (or possibly something else on the planet) are the culprits. So no blame for the Astronomers

I know jack about this subject and I'm just asking this out of interest. Is there any other kind of energy that hits the earth like cosmic or radiation rays that have been or not been measured? Also are the sun measurements taken from space or inside the earths atmos. Just curious thats all

[syberberg]

Perhaps I could weigh in on the Mars thing because I'm supposed to know some astronomy?

There are natural 'climate cycles' here on earth which are to do with:
1. the Sun (eg sunspots every 11,22, hundred-and-something years)
2. our eccentric orbit/ polar precesion etc (eg polar precession every 26,000 years and others, whose sum-total gives the milankovich 100,000 year cycle)

On top of these is superimposed, what we're doing to the planet.

OK you can see that 1. but not 2. would also have some influence on Mars. Mars will probably have its own equivalent of 2. which (my guess) is the cause of its polar alternating thang.

Right, back to the sun. Its output has been being measured, fairly reliably, for decades. Both from the surface (the chaps who discovered Global Dimming used irradiance time-series) and from space (no dimming, natch).

The upshot: These latter (space-based Sun data) have shown no change which could account for global warming all by itself: we (or possibly something else on the planet) are the culprits. So no blame for the Astronomers

I know jack about this subject and I'm just asking this out of interest. Is there any other kind of energy that hits the earth like cosmic or radiation rays that have been or not been measured? Also are the sun measurements taken from space or inside the earths atmos. Just curious thats all

Well, we get light from other suns, but by the time it gets here, it's just light and no heat. The only thing we have to worry about is if a near-by star decides enough is enough and goes super nova. At which point, we're toast.

The measurements of the sun are taken both from space and from the Earth's surface.

[RenewableCandy]

Is there any other kind of energy that hits the earth like cosmic or radiation rays that have been or not been measured?

Apart from "The cosmic background radiation", nowt as far as anybody knows. At least, not big enough to have a noticeable effect on the atmosphere/weather. The background radiation ("echos from the Big Bang") is pretty well constant, at least on a timescale that we're concerned with(!), and very, very faint.