Just got the software running today. Very cool. Been interested in weather all my life, and for the past eight years I've been looking at satellite imagery from all five major weather satellites on a daily basis. Heh. Noticed the program defaults to a METEOSAT point-of-view.

Prog. is still simulating the weather from the past millennia (on year 1811 i believe). From what I can tell (looking at temp. and pressure) it looks like a good approximation. Cloud cover looks a little funky though.

Anyway, I would like to be able to look at the history of my model run - is this possible? Be nice to be able to step through the days that have already been computed and see how the temp. and pressure dovetails with my experience.

Also, are there any detailed docs on the climate model being used? I did read they are using a 'slab' ocean model - so no ocean currents. How accurately is extratropical weather simulated? The passage of highs/lows, etc? Deep tropical convection/hurricanes? Any links or docs appreciated on this.

Thanks, Eric Bazan

Hi and welcome

I cant answer all your questions but I'll try with some.

The 1811 date is purely notional. Weather can be a bit odd early in phase 1.

You can try looking at the history of the model by backing up the BOINC folder and using CPView on the backup download available from
<a href="http://www.users.globalnet.co.uk/~sykesm/cpdn.html">Martin Sykes site</a>

Unfortunately this only allows you to look at seasonal averages. Daily information is not stored other than at time of calculation. There will be an official IDL visualisation package - hopefully soon, which will allow more access to current timestep information.

The climate model being used is a version of Hadley atmospheric model HADAM3, which does indeed use a slab ocean. Experiment 2 plans to use a dynamic ocean (HADCM3 model). You may want to try the Hadley centre website for some of your
other questions: <a href="http://www.met-office.gov.uk/research/hadleycentre/">Hadley centre</a>

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This is experiment 1, as mentioned <a href="http://www.climateprediction.net/science/strategy.php"> here,</a> and is more about probing the values of certain parameters to find the stable / unstable boundarys.

Experiment 2 will be more relistic. We hope. :)

Les

&gt; This is experiment 1, as mentioned <a> href="http://www.climateprediction.net/science/strategy.php"&gt; here,</a> and is
&gt; more about probing the values of certain parameters to find the stable /
&gt; unstable boundarys.
&gt;
&gt; Experiment 2 will be more relistic. We hope. :)
&gt;
&gt; Les
&gt;
&gt;

Any idea when the second experiment (hindcast using coupled
model) will begin? Are there a mininum number of model years that
must be completed from the first experiment before it starts?

Thanks, Eric B

&gt; Hi and welcome
&gt;
&gt; I cant answer all your questions but I'll try with some.
&gt;
&gt; The 1811 date is purely notional. Weather can be a bit odd early in phase 1.
&gt;
&gt; You can try looking at the history of the model by backing up the BOINC folder
&gt; and using CPView on the backup download available from
&gt; <a href="http://www.users.globalnet.co.uk/~sykesm/cpdn.html">Martin Sykes
&gt; site</a>
&gt;
&gt; Unfortunately this only allows you to look at seasonal averages. Daily
&gt; information is not stored other than at time of calculation. There will be an
&gt; official IDL visualisation package - hopefully soon, which will allow more
&gt; access to current timestep information.
&gt;
&gt; The climate model being used is a version of Hadley atmospheric model HADAM3,
&gt; which does indeed use a slab ocean. Experiment 2 plans to use a dynamic ocean
&gt; (HADCM3 model). You may want to try the Hadley centre website for some of your
&gt;
&gt; other questions: <a> href="http://www.met-office.gov.uk/research/hadleycentre/"&gt;Hadley centre</a>
&gt;

Thanks for the links. Hadley centre's been bookmarked :)
HadCM3 lookes interesting - the HadCEM model even more so, though
I'm guessing the CEM model is not computationally lightweight :(

This really is an excellent idea. Running these ensembles to get some
sort of grasp of these models strengths and flaws. PC's have gotten
so fast, and the vast majority of them are waaay under untilized --
unless you're playing a video game. Can harldy wait to see the
results of experiment 3, though it's disheartening to see the upper
bound for any potential global warming to have grown so much.

-Eric B

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I think experiment 2 will be later this year.
And someone said that it would take about 4 times as long to run a model.
So it will require a fast computer, and would be best run as the only dc project on the computer.

The next project is the sulphur cycle model, due in late spring, Northern Hemisphere.
I think all the models will run con-currently, so those with a slow machine can still join in.

Les

Hi Eric

Out of interest, would you mind posting which weather sat sites you watch? You must have found some good ones, as you've been watching them for so long.

Last autumn/fall, some of us were watching the NOAA Caribbean view to see the tornados.

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