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**RCM2009 [#obe1ae44]
Plan to participate RCM2009 http://www.baltex-research.eu/RCM2009/ for 4-8 May.

9:00 Prof Per Eriksson (Lund University) 
- Lund U was founded in 1666.

9:10 Bengt Holgersson (Swedish government commission on climate and vulnerability)

9:20 Rupa Kumar Kolli (WMO)

Session1 (chaired by Burkhardt Rockel)

9:30 Frauke Feser (GKSS): Added value by RCM
- 女性でした。
- Winterfeldt and Weisse, MWR 2009
- only coastal region, we can see added value. Not open ocean. 
- Spatial resolution threshold for added value?
- double nesting is necessary for typhoon simulation

9:50 Rene Laprise (UQAM)
- 男性でした。
- internal variability increases as domain size enlarges
- inperfect big-brother: checking whether RCM can improve LS.
- remaining issues:
-- spatial spin-up (200x200: 50km)

10:15 Katarina Veljovic (Univ. Belgrade)
- Storm track: ECMWF is better than RCMs!

11:00 Myself
- Reason of overestimation of precipitation (or signs of error)? (A. Will)
-- Due to spurious divergence.
- Extrapolation to stratosphere (R. Laprise)
-- better than simple way. (but no information at all)

11:20 H.S. Kang (Yonsei)
- NCEP RSM
- Internal variability?
- Sensitivity of Parameterizations

11:40 J. Tang (Nanjing U)
- MM5 (nonhydro, KF2) Spectral nudging, 50km
- 1991 Summer in China (flood)
- Someone is sticking to ask about climate simulation downscaling.
- By Hans; The difference in observation and RCM simulation: is this error from the model or something else?

12:00 K. Dairaku 
- Slight change in precipitation makes significant impact in river discharge.

12:20 Martin Suklitsch (U. Graz)
- NHCM-1, 10km
- COSMO-CLM ver4.0
- Alps up to 1km
- added value
-- no in bias and diurnal pattern
-- some in pattern
- effective resolution: 3-5*dx.

14:00 Kanamitsu (Yoshimura)
- No comment :(

14:20 Rosmeri da Rocha

14:45 A. Alexandru (Canada)
- 女性でした
- SN reduces IV.
- ちょっと効きすぎ?? Their "full nudging" is 100% replacing of waves! 
 
- ちょっと効きすぎ?? Their "full nudging" is 100% replacing of waves!

15:05 M. Zahn (GKSS)--> Very nice.
- Polar lows
- detection algorithm
-- filtered mslp < -1 hPa
- strong IV.

17:00 A. Gobiet (Wegener Center)--> comprehensive.
- 10km downscaling from ERA40 -> 4 models, 57 runs.
- 15% error from models, set-up (incl. nudging, domain)
- 50% error from parameterization (mostly from WRF)

17:25 Christopher Castro (U. AZ)
- Dynamical downscaling types 
-- IC are forgotten -> type 2 and above
- Castro 2005 + spectral nudging
- Q: short period -> robust for long period, probably.
- Q: conservation (?)

17:50 Martin Leduc (Canada)
- Little/Big brother experiments
- transient eddies
- spectral nudging 
-- Full SN: completely replacing waves -> why possible?

18:10 Erasmo Buonomo (Met Office)
- scale separation
-- 2D digital filter (Feser and von Storch, 2005)
- Discrete cosine transform (DCT) filter Denis et al., 2002

18:30 Discussion
- What evidence do we need to declare a model "wrong"?
- What is the utility of case studies?
- What added value are "we" after?
- For what purpose do we need higher resolution?
- What is the utility of applying large scale constraints?
- How do we determine the utility of large-scale constrained GCM-driven RCM simulations?

総括:
- German vs Canadianですねー。Scrippsは人手が足らん。
- Spectral nudging 大流行。

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CENTER:

RIGHT:
&size(10){category:[[Meeting>:config/plugin/calendar/_category/Meeting]] author: ''kei'' at 2009-03-09 (Mon) 07:55:33};
//-- comment --
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- Spectral nudgingって,波長の長い成分だけGCMの結果にナッジングする感じですか?
それだと側面境界を与える(というか事実上境界付近だけ全成分GCMにナッジングする)
より意味が明確かも.しかし空間差分を使ったモデルだと実装が難しい気がします. -- [[Souma at Hawaii]] &new{2009-05-10 (Sun) 17:44:52};
- コメントに今気づいた。すまんね。そう、空間的に波長の長い成分のナッジング。グリッドモデルでも波数展開して実装している模様(CRCM、WRFとか)。ただ、彼らは側方境界も残したままやってるっぽい。 -- [[kei]] &new{2009-05-12 (Tue) 09:07:58};
- おいそがしいところお相手いただきありがとうございます.やっぱりNCARとか「プログラミングが専門だけれどサイエンス(気象・気候)も一通りわかる人」と「バリバリ研究者で新しいスキームの概念を作るとかしたいけど,実装の仕方もある程度はしっている」タイプの人達がいて,チームを組んで取り組めるんでしょうね.分担と協力をしっかりマネジメントできれば,WRFとか巨大なシステムを生み出し,改良していくことができるんでしょうね. --  &new{2009-05-14 (Thu) 07:16:49};

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