EWGLAM Meeting 2021 - Day 3
szeptember 29, 2021
(8:47) martina tudor: dobro jutro
(8:54) Milan, Marco: good morning
(8:55) Klaus Stephan (DWD): Guten Morgen
(8:56) janus: Goedemorgen!
(8:57) Carl Fortelius: Go'morron!
(8:57) Reima Eresmaa (FMI): Hei kaikki!
(8:59) Pau Escribà: bon dia
(8:59) Susanna Hagelin (SMHI): god morgon
(9:00) Christoph Gebhardt (DWD): Juuten Tach!
(9:01) Ekaterina Kurzeneva, FMI: Huomenta!
(9:04) Carlos Geijo:  can´t see the presentation !
(9:04) Carlos Geijo: My screen is black :(
(9:05) Roger Randriamampianina: we see it Carlos
(9:06) Carlos Geijo: Now is ok
(9:07) Klaus Stephan (DWD): Slide 1: what is the reason RMSE reduction of 3h precip?
(9:07) Roger Randriamampianina: Put your Question here please!
(9:17) Carlos Geijo: Geijo , Carlos Geijo-
(9:17) Gabriella Szepszo (OMSZ): @Klaus: it is not clear yet. We checked the vertical profile of the analysis and first guess. There were some differences, 90L version looks more humid sometimes around 700 hPa.
(9:17) Marseille, Gert-Jan (KNMI): @Magnus, the large-scale mixing option will be outphased given that you have Jk in place now?
(9:18) Milan, Marco: Which is the time scale when the forecast is better for the system using Jk term vs the system using combined static B?
(9:18) Klaus Stephan (DWD): @Gabriella: thanks. I just missed the point 
(9:19) Tsyrulnikov Michael: Both J_k approach and the new B/(B+C) approach seem to rely on the assumption of independence of errors of the two backgrounds. Do you think this is a fair assumption?
(9:20) Milan, Marco: Thanks, very good presentation.
(9:23) Magnus Lindskog: @Gert-Jan. I think a first step will be to replace large scale mixing by this new spectral mixing prior to da. at longer term jk.
(9:26) Magnus Lindskog: @Michael. Yes it rely on this assumption. Indeed can be questioned if completly independent errors.
(9:28) Marseille, Gert-Jan (KNMI): thanks Magnus. Good progress!
(9:28) Magnus Lindskog: @Marco Thanks
(9:30) Carlos Geijo: Magnus, I have sent to you a question as a "direct message". Pleae check
(9:31) Klaus Stephan (DWD): Concerning Radar DA. Improving FBI is nice, but what is about other scores, and the precipitation bias itself?
(9:35) Klaus Stephan (DWD): thanks
(9:35) Magnus Lindskog: @Carlos sorry i wrote your last name wrongly in slide in my pres
(9:40) Benedikt Strajnar: @Klaus And additionally, we seem to have a problem with "dry" radar observations use as they not only suppress excessive rain but also dry too much the model on average. 
(9:41) Klaus Stephan (DWD): Do you apply any threshold on dbz? 
(9:41) Roger Randriamampianina: @Cchristophe: Hove you QC your T2m/Hu2m?
(9:44) Gianpaolo: How important is bias correction for 2m T/RH assimilation?
(9:45) Benedikt Strajnar: @Klaus In principle no, except near the orography the values above 15 dBZ are used, to avoid ground contamination.
(9:50) Pau Escribà: Very interesting the presentation and how the problem of the swiss case of low clouds is presented, understood and "solved"
(9:56) Christoph Schraff: @Roger: no particular QC on T2M / RH2M except for first guess check (and usual blacklisting). We want to work on improved QC, but I find it surprising that it works so well already without particular QC.
(9:57) Roger Randriamampianina: Thanks @Christoph
(10:05) Tsyrulnikov Michael: Have I understood correctly that you perform large-scale blending during the forecast every 3 hours? No sign of spinup every 3 hours (say, in precipitation)?
(10:20) Milan, Marco: @Michael: I didn't mention, we had a spin-up problem at the beginning of the project. We solved with the set-up and using a system with 0 increments in qt.
(10:21) Florian Meier: Was IAU reformulated to use 5 timeslots in one go or do you restart the forecast 5 times during IAU application?
(10:21) Martin  Leutbecher: @Loik, do you use a model uncertainty representation in the AROME EDA?
(10:22) Guest 12: To florian : yes, IAU is reformulated to use 5 increment in one go ... 
(10:23) Florian Meier: Thank you!
(10:24) Pau Escribà: nice presetation and oops working!!
(10:24) mf  bj338: Thanks Pau!
(10:35) Florian Weidle: cd
(10:36) Marseille, Gert-Jan (KNMI): @Siebren. Great EMADDC data coverage! Are all data freely available? E.g. through MARS?
(10:40) Jeanette Onvlee: @Siebren: when do you think v3 will be available?
(10:40) Carl Fortelius: @Siebren: canyou say anything about the prospects of humidity-bservations from aircraft?
(10:41) Christoph Schraff: @Sibren: any concrete guess when EMADDC V2.2 become available?
(10:41) Jeanette Onvlee: @Siebren: thanks!
(10:42) Marseille, Gert-Jan (KNMI): Thanks Siebren!
(10:42) Carl Fortelius: Thank you Siebren
(10:44) Balazs Szintai - C-SRNWP: resume at 11:00 CEST
(10:45) Piet Termonia: Dynamics session starts at 11h00
(11:19) Dmitrii Mironov: Michael, the 2nd-order BRIDGE  solution looks very much like the 4th-order solution. Would you think the 2nd order would be enough in the future, or there are go reasons to go for 4th order? 
(11:19) Claude F: for implementing some OO features in the 3D DG-code for ICON, what programming language do you plan to use ? (sorry that this is not a dynamics pure question)
(11:21) Dmitrii Mironov: Thanks, Michael.
(11:22) Claude F: OK vielen Dank Michael
(11:38) Michail Diamantakis: Ludovic, thank you for a very interesting talk! I was wondering if you had an equivalent 2.5km hydrostatic run and if you had the chance to analyse the data and find any significant differences
(11:41) Michael Baldauf (DWD): Can you please say a bit more about the variable change that brought the stability increase in SISL for steep slopes?
(11:42) Michael Baldauf (DWD): yes
(11:43) Michael Baldauf (DWD): Thank you!
(12:01) Juan Simarro: Petra! we can wait 5 minutes
(12:06) Michael Baldauf (DWD): In the linearisation around X*, is X* time-dependent? If yes, how often is the linear operator L calculated? (in every time-step?)
(12:07) Michael Baldauf (DWD): OK, thank yo.
(12:30) Claude F: can you expect to gain some additional speed-up in NH by keeping the memory of DP within the ICI iterations ?
(12:30) petithommeh: Any link with LSETTLSVF (vert filter) ? Is it similar to LRALTVDISP ?
(12:32) petithommeh: Alternate V displacement
(12:33) Claude F: very inrteresting talk indeed, Michail, on room for improvement in our "classical" setups !
(12:35) Michail Diamantakis: Thanks!
(12:35) Balazs Szintai - C-SRNWP: resume with the poster session at 13:30 CEST
(13:55) Anastasia Bundel: Hi Iris! Glad to here you! What algorithm is used to dtermine  visibility due to precip?
(13:56) Anastasia Bundel: hear
(13:57) Anastasia Bundel: Thanks!)
(13:58) Anastasia Bundel: Thank you Martina!
(14:00) Iris OP: Hi Anastasia, as you heard from Martina (thank you Martina) you can find some details in the past presentations, but if you are interested I can also ask additional details and let you know 
(14:03) Balazs Szintai - C-SRNWP: Predictability breakout session starts at 14:05 CEST
(14:03) Anastasia Bundel: That's ok, Iris, I will look at the presentations first.
(14:08) Martin Bellus: @Iris - Nice poster! Is that A-LAEF product webpage public? Can you give me the link where to find it?
(14:16) Mccabe, Anne: It's going up and down for me too
(14:32) Tsyrulnikov Michael: today something seems to be wrong with Bluejeans..
(14:38) Iris OP: @Martin thank you! Unfortunately it is not public...
(14:44) Martin Bellus: @Iris - Thanks, but do you plan to make it public some time? (For instance, we have a public webpage with A-LAEF maps covering just SVK and neighbourhood, with the full domain available only internally - if that is the reason.) 
(15:06) Iris OP: @Martin well, not sure about the DHMZ strategy at the moment, especially since these products are only being developed, but I believe it is in everyone's interest to make such products more available.  So we will definitely consider your suggestion and thank you once again for your interest!
(15:14) Eric Bazile: in real word there is physical tendancy  such as radiation or turbulent fluxes with sonic ...*
(15:18) Hannah Christensen: Ah yes - radiation is rather unique here!
(15:33) Martin  Leutbecher: brief announcement: ECMWF will organise a Model Uncertainty workshop 9-12 May, 2022. Please see website from mid-October
(15:42) Roberts, Nigel: Thnaks Chiara
(15:43) Elena Astakhova, RHM: THanks CHiara
(15:43) Sarah-Jane Lock: Thank you Chiara
(15:43) Alan Hally: Thanks Chiara
(15:43) Elena Astakhova, RHM: Bye
(15:43) Iris OP: Thank you Chiara and everyone!
(15:43) Hannah Christensen: Thank you!
(15:43) Milan, Marco: Thanks. Bye