cc: gabi.hegerl@ed.ac.uk, "Zwiers,Francis [Ontario]" <francis.zwiers@ec.gc.ca>, caetano@noc.soton.ac.uk, p.jones@uea.ac.uk
date: Mon, 03 Sep 2007 15:22:04 +1000 (EST)
from: David Karoly <dkaroly@unimelb.edu.au>
subject: Re: Extreme indices advice to WGCM
to: "Zhang,Xuebin [Ontario]" <Xuebin.Zhang@ec.gc.ca>

Hi,

Sorry for the delay in getting involved in this exchange. First, Gabi
Hegerl is going to the WGCM meeting and will be trying to represent the
interests of ETCCDI in a very busy agenda at WGCM, as well as climate
change detection and attribution interests etc.

We had already had a brief exchange at IDAG and WGCM about archiving daily
data and extremes indices from any new WGCM coordinating modelling
experiments. I agree with Xuebin that there are concerns about the
software used by some groups, as well as the need to think some more about
a small number of changes to the standard indices to be calculated on a
monthly, as well as an annual basis.

I am sure that Gabi will represent the ET interests very well.

Best wishes,  David
-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Prof David Karoly
School of Earth Sciences
University of Melbourne, VIC 3010, AUSTRALIA
ph:  +61 3 8344 4698
fax: +61 3 8344 7761
email: dkaroly@unimelb.edu.au
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

On Sat, September 1, 2007 10:56 am, Zhang,Xuebin [Ontario] wrote:
> Hi, Gabi and Francis
>
> I agree with your ideas. One suggestion is perhaps we should ask the
> modelling groups to use a standard package to compute the idices. I think
> we could modify what we have, to cvompute only those that we want.
>
> Cheers
> Xuebin
> Sent from my BlackBerry
>
> ----- Original Message -----
> From: Gabi Hegerl <gabi.hegerl@ed.ac.uk>
> To: Zwiers,Francis [Ontario]
> Cc: Nico Caltabiano <caetano@noc.soton.ac.uk>; David Karoly
> <dkaroly@unimelb.edu.au>; Phil Jones <p.jones@uea.ac.uk>; Zhang,Xuebin
> [Ontario]
> Sent: Fri Aug 31 10:18:15 2007
> Subject: Re: Extreme indices advice to WGCM
>
> Hi all, I just had a chat with Francis, it sounds good to both propose
> to store daily data and some monthly indices of extremes. The modelling
> groups might find it easier to send the indices, but the IDAG group, for
> example, is already asking for some daily data.
>
> Gabi
>
>>
>> Also, we might want to make some suggestions for what kind of
>> information we would like to collect to enable the analysis of
>> extremes in the far tails of the distribution. We collected 20-year
>> slices of daily data for that purpose last time around - which did
>> turn out to be very useful - but we might want to consider if we
>> should do this differently this time. Asking for daily data is onerous
>> for modelling groups (high volumes of data involved) but allows
>> flexibility in analysis - e.g., affectionadoes of using either annual
>> maxima or peaks-over-threshold approaches can both have at the data,
>> whereas the possibilities are more limited if we ask modellers to
>> archive only, say, monthly or annual extremes.
>>
>> Cheers, Francis
>>
>> Francis Zwiers
>> Director, Climate Research Division, Environment Canada
>> 4905 Dufferin St., Toronto, Ont. M3H 5T4
>> Phone: 416 739 4767,  Fax 416 739 5700
>>
>>
>>
>> ------------------------------------------------------------------------
>> *From:* Nico Caltabiano [mailto:caetano@noc.soton.ac.uk]
>> *Sent:* August 31, 2007 7:51 AM
>> *To:* David Karoly
>> *Cc:* Phil Jones; Zhang,Xuebin [Ontario]; Zwiers,Francis [Ontario];
>> Gabi Hegerl
>> *Subject:* Extreme indices advice to WGCM
>>
>> Dear David et al.
>>
>> Hope all is well.
>>
>> WGCM is meeting this coming week. I think you won't be attending the
>> meeting but I saw Gabi's name on the list of participants.
>>
>> At the last ETCCDI meeting, we've discussed that we should provide
>> advice to WGCM on indices that should be calculated on a possible
>> effort of model runs to the next IPCC. We surely won't have time to
>> provide a proper input to WGCM now (I apologise for not starting this
>> email exchange earlier). However I think we should send them a message
>> saying that we're startin g this discussions and will feed them during
>> inter-sessions. If they want to propose something in the meantime, I
>> think this would be ok.
>>
>> Perhaps Gabi could take this message to WGCM?
>>
>> Your thoughts on this are welcome.
>>
>> Regards
>> Nico
>>
>> /-----------------------------------/
>> /Antonio Caetano Caltabiano/
>> /International CLIVAR Project Office/
>> /National Oceanography Centre, Southampton/
>> /Waterfront Campus, European Way/
>> /Southampton, SO14 3ZH, UK       /
>> /
>> /
>> /TEL: +44-(0)23-80596207/
>> /FAX: +44-(0)23-80596204/
>> /SKYPE: nico_caltabiano/
>> /
>> /
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>> /World Climate Research Programme | //http://wcrp.wmo.int/
>> <http://wcrp.wmo.int/>
>>
>>
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>>
>
>
> --
> Dr Gabriele Hegerl
> School of GeoSciences
> The University of Edinburgh
> Grant Institute, The King's Buildings
> West Mains Road
> EDINBURGH EH9 3JW
> Phone: +44 (0) 131 6519092, FAX: +44 (0) 131 668 3184
> Email: Gabi.Hegerl@ed.ac.uk
>
>


