🚀 go-pugleaf

On Fri, 29 Oct 2010 21:41:54 -0500, "SaPeIsMa" <SaPeIsMa@HotMail.com>
wrote:

>1)    geological data shows CLEARLY that warming PRECEDED CO2 increase. in 
>the past
>
http://www.skepticalscience.com/What-does-CO2-lagging-temperature-mean.html

<Start extract>

A close look at ice core records finds that CO2 actually lags
temperature. In fact, a study came out just a few weeks ago (Stott
2007) that confirms CO2 increases around 1000 years after temperature
rise. This raises an important question - does temperature rise cause
CO2 rise or the other way around? The answer is both.

http://www.adobe.com/designcenter/thinktank/womack/tt_womack_2.jpg

The dominant signal in the temperature record (the white line in the
above figure) is a 100,000 year cycle where long ice ages are broken
by short warm periods called interglacials. This cycle coincides with
a change in Earth's orbit as it evolves from a more circular orbit to
a more elliptical orbit. When springtime insolation (incoming
sunlight) increases in the southern hemisphere, this causes
temperature to rise in the south. The warming is amplified as
retreating Antarctic ice means less sunlight is reflected back into
space.

As the southern oceans warm, they give up more CO2 to the atmosphere
as the solubility of CO2 in water falls with rising temperature. The
CO2 mixes through the atmosphere, amplifying and spreading the warming
to the tropics and northern hemisphere. This is why warming in the
southern hemisphere precedes warming in the northern hemisphere
(Caillon 2003). This is confirmed by marine cores that show tropical
temperatures lag southern warming by ~1000 years (Stott 2007). CO2
warming also explains how the relatively weak forcing from orbital
cycles can bring the planet out of an ice age.

So where does that leave Al Gore? What he says in An Inconvenient
Truth is this:

"The relationship is very complicated but there is one relationship
that is far more powerful than all the others and it is this - when
there is more carbon dioxide, the temperature gets warmer because it
traps more heat from the sun inside." 

This statement, while an oversimplification, is essentially correct. A
more accurate and informative statement would've been

"A change in Earth's orbit warmed the southern oceans which released
more CO2 into the atmosphere. The extra CO2 trapped more heat from the
sun and amplified the warming. It also mixed through the atmosphere,
spreading the warming to the tropics and northern hemisphere" 

<End extract>

>
>2)    Other sources of CO2 such as volcanoes, fires, even cow farts are 
>greater producers of causative gases than human activity
>
I have not seen data to support that claim.

>
>3)    There is NO EVIDENCE to suggest that human caused increase in CO2 is 
>large enough to cause ANY EFFECT on warming or cooling on the planet
>

Actually the correlation between increasing CO2 and temperature is
enough to suggest that.

>
>1)    The IPCC data has been pretty well discredited, 
>
This error was reported.

IPCC admits Himalayan glacier error
http://www.sciencenews.org/view/generic/id/55455/title/Science_%2B_the_Public__IPCC_admits_Himalayan_glacier_error

But its been found and corrected.

>
>Meanwhile the Antarctic ice is growing to the point that there is 14% more 
>of it now than there was in 1980
>    http://www.globalwarminghoax.com/news.php?extend.133
>

True, but:
http://climateprogress.org/2010/10/27/increasing-southern-sea-ice-antarctica/

<Start extract>

The Southern Ocean consists of a layer of cold water near the surface
and a layer of warmer water below. Water from the warmer layer rises
up to the surface, melting sea ice. However, as air temperatures warm,
the amount of rain and snowfall also increases. This freshens the
surface waters, leading to a surface layer less dense than the
saltier, warmer water below. The layers become more stratified and mix
less. Less heat is transported upwards from the deeper, warmer layer.
Hence less sea ice is melted (Zhang 2007).

<End extract>

However the above phenomenon only occurs in the sea around Antarctica.

When it comes to ice on land in Antarctica, warmer temperatures are
causing that ice to melt as one would expect.
http://www.nasa.gov/topics/earth/features/20100108_Is_Antarctica_Melting.html

Larger image here:
http://www.nasa.gov/images/content/416685main_20100108_Climate_1.jpg