Text 17544, 69 rader
Skriven 2007-08-19 19:09:04 av Carl (4021.babylon5)
  Kommentar till text 17541 av rec.arts.sf.tv.babylon5.moderated (4018.babylon5)
Ärende: Re: Newsgroup back!
===========================

"John W. Kennedy" <jwkenne@attglobal.net> wrote in message 
news:4Z3yi.404$zD4.51@newsfe12.lga...
> Jay Denebeim wrote:
>> In article <9f087$46c7c0e6$1860878d$27342@KNOLOGY.NET>,
>> Dennis \(Icarus\) <ala_dir_diver@yahoo.com> wrote:
>>
>>> "It is no longer possible, scientifically or politically. to deny
>>> that human activities have very likely increased global temperatures;
>>
>> Actually I disagree with this.  Global warming is a fact, I don't find
>> the evidence that it's humans who have caused it nearly as
>> conclusive.  For one thing, how anything we do can affect Mars, which
>> is also experiencing global warming, seems rather preposterous.
>
> You're a victim of cherry-picking. See 
> <URL:http://feeds.feedburner.com/~r/BadAstronomyBlog/~3/112997117/>.


I'm going to avoid taking a side in this, but that site offers no 
information on which
to base a conclusion.  He offers a lot of guesses and rationalizations, but 
his logic
is questionable in several places.

The site states:

"the Earth gets most of its heat from the Sun, so if the Sun were the cause,
we'd expect the effects of warming to be much stronger on Earth than any 
outer planets."

This ignores a lot of factors in the nature of the density and composition 
of our atmosphere.
For instance, solar radiation causes our atmosphere to create high altitude 
clouds (with a different temerature effect than low altitude clouds) and the 
would be effect is different based on the composition of the of atmostphere 
on other planets.

He suggests that because no one has reported increased temperatures on
some of the other bodies in the solar system that it isn't happening.  This 
is
dubious reasoning at best, and ignores the possibility that the data is not 
there yet
or that other factors may be affecting the measurements.

Moving off of that site, there is more recent information that is 
interesting
(not conclusive one way or another, but under-reported:

The fact that at the end of every warming period recorded in Earth's history 
there
was also a corresponding hike in greenhouse gases.

Also, if you noticed the story
http://earthobservatory.nasa.gov/Newsroom/MediaAlerts/2007/2007070525352.html
you'll note that the evidence found in Greenland (often cited with great 
alarm at the
diminishing snow and ice cover) was previously mush warmer than it is now
(estimates between 5 and 9 degrees), and that "...the global ocean was
probably between one and two meters higher during that time than it is 
today"

I'm not saying that there is (or isn't) human causality here.  Just adding
a little more info to the mix, and questioning the site that you offered
as being rationalization.

Carl
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