Re: [asa] Rush Limbaugh Science Lesson

Some of this was covered in a post a few months ago.
http://www.calvin.edu/archive/asa/200802/0203.html

randy
----- Original Message -----
From: "Murray Hogg" <muzhogg@netspace.net.au>
To: "ASA" <asa@calvin.edu>
Sent: Thursday, May 29, 2008 2:12 PM
Subject: Re: [asa] Rush Limbaugh Science Lesson

> Hi Rich,
>
> This historical perspective on the global warming issue is fascinating
> stuff - particularly as the impression often given in the media is that
> global warming was first discovered about six minutes after tea-time last
> Tuesday. It appears that the full story isn't getting the exposure it
> deserves.
>
> A few questions on the historical data, though:
>
> (1) how are we able to determine historical CO2 levels? [my guess:
> ice-coring?]
>
> (2) how far back are we able to make reasonable assessments of CO2 levels?
>
> (3) what explanation is given to account for the previous historical high
> 80k years ago?
>
> and
>
> (4) does the data give any support to the argument that the current
> increase is just part of a cycle? [my guess: it's the level of current CO2
> emissions which is the critical consideration as it swamps any historical
> trend from the pre-industrial period]
>
> Thanks, by the way, for a very interesting contribution.
>
> Blessings,
> Murray Hogg
> Pastor, East Camberwell Baptist Church, Victoria, Australia
> Post-Grad Student (MTh), Australian College of Theology
>
> Rich Blinne wrote:
>> Times up. Pencils down. The relationship between CO2 and temperature was
>> discovered by Svante Arrenhius via his computer models. :-) If you don't
>> get the joke note that his was in 1896!! It's known as a climate
>> sensitivity. For Earth, the equilibrium climate sensitivity is 3 degrees
>> C when CO2 is doubled. CO2 levels are over 30% more than what they were
>> in the mid-19th Century and are at their highest level in at least 800000
>> years.
> <snip>
>
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Received on Thu May 29 15:54:10 2008