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Dear all<br>
<br>
Isn'it required, in addition, that r<N> values are consistent
between an Historical run and each RCP run started form its 2006 state ?<br>
<br>
S<br>
<br>
Karl Taylor wrote, On 01/02/2011 19:57:
<blockquote cite="mid:4D4857A0.1050000@llnl.gov" type="cite">
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<font face="Times New Roman">Hi Charlotte,<br>
<br>
Congratulations! you managed to crack the intended use of "rip" in
spite of what I thought was a scheme so complicated, that no mere
mortal could be expected to decipher it.<br>
<br>
That being said, I think we should probably expect others (with lesser
proclivity to meticulousness) to fail in attempting to follow the
recommendations. In particular, we may not be able to count on the "p"
and "i" values being consistent across all simulations by a single
model. If that were the case, would it completely disrupt your plans?<br>
<br>
One approach would be as follows:<br>
The first time that someone records the information for an experiment
(i.e., the first member of the "rip" ensemble), they would be asked to
document the model and all the experimental conditions. Then when
subsequent members were entered, they should only have to reference the
first member and say how the model physics (in some cases when p
differs) or the experiment conditions (initial conditions when "i"
differs and in some cases "forcing" when "p" differs). In the case of
a different value of "r", typically the "spawning" point from the run
will differ from one member of the ensemble to another. [Note,
however, that for the TAMIP project, this identifies a different start
time for the forecast within the season.] <br>
<br>
Sorry it's so difficult.<br>
<br>
Best regards,<br>
Karl<br>
</font><br>
On 2/1/11 6:09 AM, <a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:charlotte.pascoe@stfc.ac.uk">charlotte.pascoe@stfc.ac.uk</a>
wrote:
<blockquote
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type="cite">
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<p class="MsoNormal">Hi Karl and Bryan, <o:p></o:p></p>
<p class="MsoNormal">It is important to know how the r<N><span
class="SpellE">i</span><M>p<L> <span style=""> </span>indices
are to be implemented in CMIP5 so that we can be sure that information
about them is captured correctly by the questionnaire. <span style=""> </span>Here
is my understanding, please correct me if I’m wrong!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The scope of the p<L> and <span
class="SpellE">i</span><M> indices are model wide – these
indices must mean the same thing across all simulations for a
particular model.<o:p></o:p></p>
<p class="MsoNormal">The scope of the r<N> indices are
experiment wide – <span style=""> </span>the r index is not required
to mean the same thing across all simulations for a particular model,
so the r indices can be reused by different experiments.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is an example to show what this would
mean in practice. <o:p></o:p></p>
<p class="MsoNormal">If the meaning <span style=""> </span>of the
r<N> indices were confined to <span style=""> </span>an
experiment <o:p></o:p></p>
<p class="MsoNormal">then if you had used r1, r2, and r3 to label
the members of an <span class="SpellE">amip</span> ensemble:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left: 36pt;">tas_day_HADCM3_amip_r1i1p1_197901-200901.nc<o:p></o:p></p>
<p class="MsoNormal" style="margin-left: 36pt;">tas_day_HADCM3_amip_r2i1p1_197901-200901.nc<o:p></o:p></p>
<p class="MsoNormal" style="margin-left: 36pt;">tas_day_HADCM3_amip_r3i1p1_197901-200901.nc<o:p></o:p></p>
<p class="MsoNormal">you could use r1,r2 and r3 again to label the
members of a different experiment, say decadal2000:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left: 36pt;">tas_day_HADCM3_decadal2000_r1i2p1_200001-201001.nc<o:p></o:p></p>
<p class="MsoNormal" style="margin-left: 36pt;">tas_day_HADCM3_decadal2000_r2i2p1_200001-201001.nc<o:p></o:p></p>
<p class="MsoNormal" style="margin-left: 36pt;">tas_day_HADCM3_decadal2000_r3i2p1_200001-201001.nc<o:p></o:p></p>
<p class="MsoNormal">rather than having to begin labelling from a
new r index, say r4:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left: 36pt;">tas_day_HADCM3_decadal2000_r4i2p1_200001-201001.nc<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Where<o:p></o:p></p>
<p class="MsoNormal">p<L> - identify perturbations in physics
(from the same base model) <o:p></o:p></p>
<p class="MsoNormal"><span class="SpellE">i</span><M> -
identify perturbations in initialisation method<o:p></o:p></p>
<p class="MsoNormal">r<N> - identify ensemble members which
differ in other characteristics.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Please shout if my interpretation is wrong!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style=""><o:p> </o:p></span></p>
<p class="MsoNormal"
style="margin-bottom: 6pt; text-align: justify;"><b><span
style="font-size: 14pt; font-family: "Lucida Handwriting"; color: rgb(51, 51, 204);">Charlotte<o:p></o:p></span></b></p>
<p class="MsoNormal" style=""><span
style="font-size: 9pt; font-family: "Arial","sans-serif"; color: rgb(89, 89, 89);">----------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span
style="font-size: 9pt; font-family: "Arial","sans-serif"; color: rgb(89, 89, 89);">Dr
Charlotte Pascoe<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span
style="font-size: 9pt; font-family: "Arial","sans-serif"; color: rgb(89, 89, 89);">NCAS
British Atmospheric Data Centre<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span
style="font-size: 9pt; font-family: "Arial","sans-serif"; color: rgb(89, 89, 89);">STFC
Rutherford Appleton Laboratory<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span
style="font-size: 9pt; font-family: "Arial","sans-serif"; color: rgb(89, 89, 89);">Phone
+44 1235 445869; Fax ...5848<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span
style="font-size: 9pt; font-family: "Arial","sans-serif"; color: rgb(89, 89, 89);">e-mail</span><span
style="font-size: 9pt; font-family: "Arial","sans-serif";"> <a
moz-do-not-send="true" href="mailto:c.l.pascoe@rl.ac.uk"><span
style="color: blue;">charlotte.pascoe@stfc.ac.uk</span></a><o:p></o:p></span></p>
<p class="MsoNormal" style=""><span
style="font-size: 9pt; font-family: "Arial","sans-serif"; color: rgb(89, 89, 89);">----------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span style=""><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<br>
<p>-- <br>
Scanned by iCritical. </p>
<br>
</blockquote>
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<br>
<pre class="moz-signature" cols="72">--
Stéphane Sénési
Ingénieur - équipe Assemblage du Système Terre
Centre National de Recherches Météorologiques
Groupe de Météorologie à Grande Echelle et Climat
CNRM/GMGEC/ASTER
42 Av Coriolis
F-31057 Toulouse Cedex 1
+33.5.61.07.99.31 (Fax :....9610)</pre>
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