GIFS/TIGGE WG 5th MEETING ACTION ITEMSMar 14, 2008
1
Information on generation procedures for TIGGE global ensemble
metadata:a)Agree on information content - Z. T. coordinates with Ken Mylne,
circulate to WG members before it is finalized (K.Mylne, Z.Toth, Apr.
15,)
b)Study WIS-compliance aspects and related costs, study xml; set up
xml template if appropriate, recommend other format otherwise (B.
Ebert, W. Almeida, possibly with some help from ECMWF, Apr 30)
c)
Producing centers prepare info sheet in table format (marked with
implementation date), post this on their web site, send url info toTIGGE webmaster(s) (All producing centers, May 31,)d)
TIGGE web master(s) create links to producing center url’s (TIGGE
webmaster(s), June 30)
e)Producing centers add new table every time their system is changed;
old tables are to be kept on web for reference (All producing centers,ongoing)
2TIGGE-LAM subgroup to strengthen links with THORPEX Regional
Committees (Sep 2008, T. Paccagnella). TIGGE-LAM group toconduct a precise survey of LAM-EPS groups interested in IC/BC inpressure levels in real-time (T.Paccagnella, Sep 2008)
3Regarding EC0-1 from THORPEX EC Febr. 7, 2008 meeting: TIGGE /GIFS WG finds the representation of THORPEX WGs and Regional
Committees insufficient with only one co-chair from all WGs and RCs
on the EC. This may not allow efficient information exchange between
ICSC meeting. A co-chair from each WG and RC would provide muchbetter representation. Note that most EC business could possibly bedone via e-mail (co-chairs of TIGGE/GIFS WG will report on this toICSC, Nov 2008)4Barbara Brown and Tom Hamill to be moved to SERA & DAOS WGs
as recommended by March 2007 TIGGE / GIFS WG meeting (cochairs report to ICSC, Nov 2008). L. Wilson to represent TIGGE at
SERA meetings (co-chairs, IPO)
5
Even though SERA WG assumed wider role, we request that forproper collaboration with THORPEX WG, their activities, membership,
etc be listed as before under THORPEX in reports etc (ZT report toIPO, Mar. 2008)6
Collect information on usage of TIGGE Phase-1 archive from the threearchive centers, share info with WG members (Steve Worley, Sep2008)
7
Advertise TIGGE web forum accessible from NCAR archive site, addlinks to the forum from other TIGGE access sites (Steve Worley, May2008)

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Invite a WIS expert to next TIGGE / GIFS WG meeting (co-chairs, IPO,Sep 2008)
Consider addition of new records into TIGGE Phase-1 dataexchange/archive (in format similar to existing variables) depending onmore concrete requests from TIGGE-LAM subgroup and PDP WG. For
example NWP experiments need more complete information on IC (oncontinual basis; JMA request, MUMMA-type research) and BC (forpreselected periods, ~30 days per year, TIGGE-LAM support)
facilitating ensemble experiments (Y. Takeuchi / C. Bishop consult with
PDP WG, T. Paccagnella consult with TIGGE-LAM subgroup to
develop list of added variables – May 31; producing centers / archive
centers consider including additional variables, not to exceed a total of
10% increase in data volume per year – Nov 2008).
GRIB2 precip encoding/decoding problem noted by JMA; detailed
description of problem to be sent to archive centers (Y. Takeuchi, Apr2008)
ECMWF web page expanded with list of TIGGE-related publications(P. Bougeault, May 31)
Explore what observational data readily accessible through NCAR,NCDC/NOAA and possibly other web sites may be relevant for TIGGE
verification efforts; add useful information to TIGGE-related web sites(Laurie Wilson, June 2008)
JMA to continue and expand its WMO-sponsored verification activities
following recommendations by Ensemble Expert Team. Finalverification of selected upper level grids against each center’s own
analysis to be provided by each producing center to JMA (Allproducing centers, ongoing); missing statistics to be computed andposted by JMA (Y. Takeuchi, Jul 2008). JMA to consider verification ofa combined, 10-center TIGGE ensemble (Y. Takeuchi, Oct 08)(verifying analysis to be selected after consultation with experts).
Verifying analysis for, and verification of precipitation ensembles to beconsidered later
Encourage THORPEX Regional Committees & RSMCs in use anduser specific verification of TIGGE data against observations or otherrelevant data (co-chairs, L. Wilson, & IPO, May 2008)
Prepare draft letter to be sent by WWRP to JMA Intl Affairs Office& KMA (and possibly other producing centers if needed) with request
to provide TC data in CXML format on ftp site for research applications
during TPARC. Access can be limited to registered users. Request
consideration of continued access to data after T-PARC, underconditions defined by data providers (Z. Toth and IPO, April 2008)
Contact colleagues at CMA (Shanghai) engaged with TC forecasting to
explore their interest and willingness to contribute to CXML TC dataexchange (J. Gong, May 2008)
Proposed CXML format and content for real time exchange of TC (andlater ETC) accepted by WG with minor changes. CMA, JMA, KMA,ECMWF, CMC (through NCEP), UKMETOFFICE, and NCEP
expressed an interest and readiness to make files with TC info in cxml
format available through their individual ftp sites in real time by July
2008 for TPARC (Aug-Sep 08, Jan-Mar 09), and with 48-hr delay if
desired by any producing center, beyond TPARC Tracking algorithms /software voluntarily shared among centers (7 contributing centers, July2008).. BOM & METEOFRANCE to explore possibility to contributelater.
18
Producing centers to provide ftp site and access info to B. Ebert forinclusion on CXML T-PARC & TIGGE web sites (Contributing centers,June 2008)
19
CXML proposal to be augmented by content & name of files to bemade available by producing centers (Proposal by B. Ebert, 31 March,
final version after consultation with all producing and archive
centers,15 April)
20
CPTEC expressed an interest in tracking subtropical and extratropicallows, explores use of cxml format, report on experience to cxml team,and in its ensemble to be processed by other parties for TC tracks (P.
Silva Dias, B. Ebert, Sep 08)
21
NCAR, and possibly ECMWF could create cxml archive, contingent on
appropriate file naming and data transmission protocols. Access /interrogation methods to archived data unclear until further
specifications are given. Archiving of TC information to be explored,
either at phase-1 archive center(s), and/or in distributed phase-2
framework, in conjunction with focal group addressing phase-2
archiving issues (B. Ebert, Sep 2008)
22
WG discussed Phase-2 / GIFS draft plan, including concept of realtime data exchange (Phase-2) and product generation (GIFS) as newelements in TIGGE / GIFS, and agreed with general structure of plan.
Content needs to be revised; revisions based on specificrecommendations (eg, NCAR conditions to link their archive with futurecommon user web interface; interactivity) to be included before
document is presented to IPO & ICSC. Archiving to be discussed
further at Sep 08 meeting. (Revised plan circulated to WG – Apr 30;
WG feedback, May 31; Final version, June 30)
23
WG identified archiving of ensemble data and derived products during
Phase-2 and GIFS as an area that will need further consideration anddiscussion. Options to consider include:
For ensemble forecast data:a) Continue Phase-1 archive system (3 central locations, with identicalcopies of data. NCAR & ECMWF expressed a willingness andinterest to continue with current archive systemb) Distributed archivingi)
Data archived by 3 centers partitioned, avoiding duplication (eg,each center collects and holds data from 3-4 different producingcenters)

ii)
iii)

Data archived by producing centers (Some expressed interest)
Combination of (i) & (ii), ie, some centers archive their own data,
while others send their data to central archives
For derived products – first assess what needs to be archived, then:a)Archive at producing centersb)
Archive at RSMCs who use the datac)
Archive at data distribution centers (GISC)
d)Archive at TIGGE Phase-1 archive centerse)
Combination of above, ie, find most suitable solution for each type ofdata
Prepare for discussion of archiving issues for duration of Phase-2 &GIFS at next WG meeting (Phase-2 / GIFS Planning sub-group toprepare discussion material for Sept WG meeting, Zoltan Toth & subgroup members, Sept 2008; WG members to report about theircenter’s archiving interest/willingness, Sept 2008)24
Continue current archiving practices at 3 centers unntil new
arrangements are developed and accepted for data archiving,. (Repsfrom archiving centers, ongoing)25
For detailed planning, start two focus groups for initial Phase-2 & GIFS
planning with volunteers from WG members, technical experts fromproducing & archive centers, and invited experts on WIS etc (cochairs, Apr 30):a) Real time data exchange, product generation, web interface,archiving issuesb) Tool box (shared development and use of algorithms/software –Mohan Ramamurthy)
26
Focus groups report to full WG (Sep 08 WG meeting, focus groupleaders)
27
Start exploring real time exchange of gridded precipitation data as
prototype for Phase-2 real time data exchange and GIFS productgeneration; coordinate with real time data exchange focal group (L.
Wilson, P. Dias, Sep 2008)
28
After discussion, WG found YOTC data request lacks some details.
Also, it is not clear how wide the potential user base of the new data
would be. Further, it was not clear if for the studies foreseen, whether
ensemble data would be needed or data from a single high resol;ution
integration may be best. Also, since the generation of the data may
require significant resources, it may be preferable to derive the datafrom special off-line integrations, as opposed to operational forecasts.
Overall, the WG felt the request may be better addressed by WGNE,
and suggest YOTC contact the WGNE group. (Z. Toth, March 08)
29
The WG briefly discussed the issue of timeliness of data access fromTIGGE Phase-1 archives during demonstration projects like T-PARC. It
was noted that though the normal 2-day delay for data access iswaived for such periods, there is an unavoidable delay of around 36
hrs due to the transmission procedures used to transfer large amounts

3031323334353637of data on a regular basis from the 10 producing centers to the 3archive centers. The WG encouraged interested T-PARC participants
to take advantage of the TC track/intensity information that theproducing centers plan to make available in real time during T-PARC.
Once Phase-2 of TIGGE is developed, real time access to ensemble
data will be feasible (Z. Toth, info item for IPO, March 2008)
WG agrees to organize TIGGE workshop (or TIGGE sessions) as partof Science Symposium in March 2009. Request IPO to position TIGGE
sessions in middle of meeting. Example: Tue pm: TIGGE research
results (jointly organized with PDP); Wedn morning: overview ofTIGGE Phase 1 (~1 hr), followed by tutorial on 3 archive centers (inposter area with 3 PCs, 1 hr), then user feedback on phase-1 (3 hrs);
Phase-2 & GIFS plan overview, followed by discussions (3 hrs inafternoon); Thurs am: Sera applications (R. Swinbank, Y. Takeuchi,
Laurie Wilson volunteered as members of organizing group, along with
K. Mylne from Ensemble ET CB from PDP - ongoing; JMA appointed
Mio Matsueda as member of the organizing group shortly after themeeting. The co-chairs will appoint a leader for the organizing group)
Short PR paper on TIGGE Phase-1 to be published in EOS, after
NCAR upgrades to its archive in ~June (P. Bougeault, July 08)
Longer paper with some science results to be published in BAMS (P.
Bougeault, Dec 08)Presentations at meetings on TIGGE; encourage science results (PDP,SERA, etc):a) AMS Annual meeting Feb. 08, New Orleans (Y. Zhu)b) EGU, Vienna, Apr 08, Z. Tothc) AGU, Fort Laudardale, May 08, Glenn Rutledged) EMS, Oct 08, P. Bougeaulte) Asian TIGGE / THORPEX science workshop J. Gong, Oct 08f) AMS 09, S. Worleyg) Brazil, Apr 09, control theory / TIGGE. P. Diash) IAMAS, summer 09 R. Swinbank
Suggest to other groups the addition of links on their web pages toTIGGE archive sites (B. Ebert, June 08)
TIGGE / GIFS WG wishes to participate at Geneva, Sept 22- meeting,request at least 1-2 day separate meeting (co-chairs & IPO, Mar 08)
TIGGE-LAM sub-group meeting to be organized for Geneva Sep 22week, 1-2 days, with opportunity for sub-group to join some of TIGGE /GIFS WG discussions (T. Paccagnella, co-chairs, IPO, Mar 08)
Invite GEO user committees to co-organize and attend THORPEX
Symposium and TIGGE workshop/sessions (L. Wilson, IPO, Apr 08,
after time/location finalized)