Monday, March 12, 2012

2415.txt

date: Thu Jun 23 11:41:25 2005
from: Phil Jones <p.jonesatXYZxyz.ac.uk>
subject: Re: Fwd: Dave Keeling
to: Ian.SampleatXYZxyzrdian.co.uk

Ian,
I'm not an expert in this, so I'd try and get someone else, but I'll try.
I think the confusion is due to the natural and the enhanced (i.e. the human
induced part) of the greenhouse effect. Natural here is why the mean
temperature of the Earth is 14 deg C and not 30 degs cooler.
Water Vapour is the main component of the natural greenhouse effect.
Water Vapour is about 60-70% of the total if the sky were clear. CO2 is
about 25%. The water vapour contribution is virtually impossible to
measure and it depends on which lines in the absorption spectra get
saturated.
The additional CO2 since pre-industrial times is about 62% of the human-induced
part. The rest (38%) is CH4, N2O, CFCs etc.
So, they likely refer to different things: whether you include the natural greenhouse
effect and whether you include water vapour.
Cheers
Phil
At 10:18 23/06/2005, you wrote:

Phil, hi,
Thanks for the message and the email. We heard the news about Keeling after
trying to track him down for a comment. I believe we're going to be doing
an obit - at least I have pushed for it. I'm going to look again at the
piece I've done - it's more a very very selective skip through some of the
key milestones from Arrhenius onwards rather than a piece on Keeling
himself.
Incidentally, I wondered if you might be able to help me clear something
up. I'm trying to check a figure for the %age contribution of CO2 to the
greenhouse effect. I found figures attributing around 60% to atmospheric
water vapour, but there seem to be two figures for CO2 - either around 25%
or around 62%. If it's 62% (as a noaa guy told me last night), it means the
water figure must be wrong. I'm wondering if there's a bit of confusion in
that maybe the figs refer to different things. Might you know someone who
can clarify what the contribution is?
It'd be great if there's anyone who can help!
With thanks again,
Ian


Phil
Jones

<p.jonesatXYZxyz.ac. To:
ian.sampleatXYZxyzrdian.co.uk
uk>
cc:
Subject: Fwd: Dave
Keeling
23/06/05
08:54

am

Ian,
This is all I have.
Jim Fleming is an American Historian who has written a book
on the scientists involved in climate change work over the last few
centuries, but mainly from Aarrhenius onwards.
Here is his co-ordinates if you need more.
James R. Fleming
--
Science, Technology and Society Program
Colby College
5881 Mayflower Hill
Waterville, ME 04901-8858 USA
Phone 207-872-3548
Fax 207-872-3074
Secretary 207-872-3246
Profesional Profile: [1]http://www.colby.edu/profile/jfleming/
"James R. Fleming" <jflemingatXYZxyzby.edu>
>Dear Alan,
>
>I will be sending you a complete DVD of the scanned Callendar papers, but
>for now, can you make the minor changes indicated below in Box 1.
>
>Also, Dave Keeling at Scripps died Monday of a sudden heart attack. I'm
>sure it is news in the CRU.
>
>Thanks for doing this,
>Jim Fleming
Prof. Phil Jones
Climatic Research Unit Telephone +44 (0) 1603 592090
School of Environmental Sciences Fax +44 (0) 1603 507784
University of East Anglia
Norwich Email p.jonesatXYZxyz.ac.uk
NR4 7TJ
UK
----------------------------------------------------------------------------

Prof. Phil Jones
Climatic Research Unit Telephone +44 (0) 1603 592090
School of Environmental Sciences Fax +44 (0) 1603 507784
University of East Anglia
Norwich Email p.jonesatXYZxyz.ac.uk
NR4 7TJ
UK
----------------------------------------------------------------------------

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