Re: so once again, why is Mars warming?

James Schrumpf wrote:
Quiet, "Randolph M. Jones" <rjones@xxxxxxxxxxxx> -- I'm transmitting
rage.

James Schrumpf wrote:
Quiet, "Randolph M. Jones" <rjones@xxxxxxxxxxxx> -- I'm transmitting
rage.

James Schrumpf wrote:
Quiet, Jeffrey Davis <jd_home@xxxxxxxxxx> -- I'm transmitting rage.

Emperor Wonko the Sane wrote:
On May 1, 10:37 am, lein <boomer_the_...@xxxxxxxxxxx> wrote:
??
It appears you're never going to get an answer.
I posted a discussion from RealClimate regarding this just today.

If lein doesn't want to read it, peachy.

Basically, it's human-caused on Earth but many natural processes
have caused it on Mars, none of which can happen here.

Move along, nothing to see here.
So are you joining the crowd that is now insinuating that the GW
claim is that *all* global warming is caused by humans? You and
Hennig are peas in a pod.

According to this IPCC summary:

http://www.greenfacts.org/climate-change/ipcc/ipcc.htm

"The warming over the past 100 years is very unlikely to be due to
internal variability alone and is unlikely to be entirely natural in
origin."

* * *

So, no, I'm only joining the crowd that says the above. However,
since there is nothing but "internal variability" and "natural in
origin" on Mars, I await the explanation (and accompanying evidence
for same) as to why Mars is exhibiting a very similar GW event as
Earth.

Why is the current CO2 spike (on earth) so much bigger than any of the
previous cyclic spikes? Doesn't that suggest that this time there's something "extra" happening (on earth)?

For those keeping score, this is the third time I've asked you this,
but I understand that you probably didn't see it either of the other
two times. I'm sure you'll answer this time. Here, I'll even hold my
breath.


I don't think there's any argument that increased atmospheric CO2 is caused by human activity. The debate is "How much of the observed warming is caused by this increase?", and the answer is "We don't really know."

We don't really know because in the atmospheric record of the past 400,000 years as revealed by the ice cores, the CO2 increases followed the warming trend by about 800 years; and even as the CO2 increased, the warming trend managed to stop and reverse itself. At the very least, one can't propose that the following trend caused the leading trend. Something had to have happened to cause the temperature increase in the first place, which then lead to the CO2 being released from the oceans. Then that trend reversed and the increased atmospheric CO2 was insufficient to keep global temps up, so they fell again. This cycle has repeated itself many times.

If I've kept track correctly, you have accepted the following premises:

CO2 traps heat.
More CO2 traps more heat.
Heat leads to higher temperatures.
Human activity is part of the current increase in CO2.

But you do not accept:

Human activity is part of the current temperature increase.

Have I got that right? Are you Achilles' tortoise?


There are indicators that the observed warming has leveled off. Time and more measurements will tell if this is true. Regardless of whether it's true, I agree that taking steps to reduce atmospheric CO2 is a good thing, but the "carbon trading" idea is just a scam.


If you think reducing CO2 would be a good thing, then what do you think is the best approach to give people an incentive to do so?
.

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