date: Thu, 6 Mar 2008 16:12:59 +0000
from: chris bradley <chrismb68atXYZxyzmail.com>
subject: RE: Humidity, and hadcrut3
to: Phil Jones <p.jonesatXYZxyz.ac.uk>
Many thanks for your reply. I'll look forward to seeing the revised paper.
One other energy contribution/sink I've wondered about, I'm not sure I mentioned it before,
is wind speed. The energy to increment dry air by 1degC is equivalent to the energy
required to accelerate the same from, for example, 20m/s to 48m/s. I have no idea what the
contribution the wind speeds of the upper atmosphere make to the 'global average' wind
speed, but if the starting av. velocity is much higher, then it becomes a much smaller
velocity change that may be only marginally noticed at surface level. e.g +1degC==+9m/s
(starting at 100m/s).
It's just a thought!
My issue/concern, and the reason for my interest, is that if wind speed AND humidity are
both on the increase they may be masking an effect of sufficent magnitude that the actual
dry/static temperature change is actually a 'relatively minor' phenomenon, in terms of the
total energy flow calculation for the atmosphere!?
> Date: Thu, 6 Mar 2008 15:19:58 +0000
> To: chrismb68atXYZxyzmail.com
> From: p.jonesatXYZxyz.ac.uk
> Subject: Re: Humidity, and hadcrut3
> I ought to be able to email you the revised humidity paper we'll send back
> to J. Climate. This might be after Easter.
> The figure you sent is correct. What you're seeing though is weather.
> We're in (maybe for few months more) a large La Nina, which tends
> to make the world cooler - works similar but opposite to El Nino, which
> made 1998 so warm.
> These events are even more visible in the humidity data.
> For temperature, weather and natural variability (partly from ENSO) is
> large on timescales from monthly up to about 3-4 years, so
> dominates over human influences. The latter dominate over decadal
> and longer timescales. The DailyTech probably didn't bother to explain that!
> At 14:28 06/03/2008, you wrote:
> >Many thanks for the information you sent through to me last year. I
> >was wondering if I might enquire how the research on humidity
> >corrections was going. I would be interested in seeing how those
> >results work out.
> >Also, I came across the attached graph (from 'DailyTech')which says
> >it was plotted from the latest hadcrut3 data. Though I have
> >downloaded hadcrut3 myself, I regret I cannot process the data as
> >the data set is now bigger than msoffice permits - which is all the
> >software I have these days (I no longer have access to a Unix
> >machine to easily draw off the data). I was wondering if you might
> >indicate if the graph accurately depicts the data in the latest data set.
> >best regards,
> >Chris MB.
> >Who's friends with who and co-starred in what?
> 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
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