Pseudo-prognostic TKE scheme in ALARO
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1 Pseudo-prognostic T scee in ALARO Jean-François Geeyn ČHMÚ on eave of absence fro Meteo France Fiip Váňa ČHMÚ Czec ydroeteoroogica institute Jure Cedinik ARSO nvironenta agency of Sovenia Met. office Martina Tudor DHMZ Croatian eteoroogica and ydroogica service Radia Brožkova ČHMÚ Czec ydroeteoroogica institute Bart Catry Gent University Begiu
2 16 t ALADIN worksop Sofia May 06 2/16 Pseudo-prognostic T scee in ALARO Outine of te tak T: wat's in ALADIN pt: idea ipeentation ALARO resuts
3 16 t ALADIN worksop Sofia May 06 3/16 Pseudo-prognostic T scee in ALARO T in ALADIN Louis type scee: - ony vertica diffusion - diagnosed vaues for turbuent coefficients current scee is perforing we for scaes around 10k (we don't want to trow away tat!) anti-fibriation treatent
4 16 t ALADIN worksop Sofia May 06 4/16 Pseudo-prognostic T scee in ALARO Pseudo wat?! sti copute diagnosed coefficients repace fu T equation wit a pseudo one (suc tat its soution wi be te diagnosed coefficients) foow and extend te idea of Redesperger Maé and Carotti (2001) inor code canges keep wat is good
5 16 t ALADIN worksop Sofia May 06 5/16 Pseudo-prognostic T scee in ALARO Fu T going pseudo fu T = advection t + diffusion + ecanica or sear production/destruction + buoyancy production/consuption + viscous dissipation pseudo T t = advection + diffusion + Newtonian reaxation towards soeting
6 16 t ALADIN worksop Sofia May 06 6/16 Pseudo-prognostic T scee in ALARO Pseudo prognostic T equation t 1 1 Adv( ) ( z z ) Were do we get fro? And wat do we reax towards?
7 16 t ALADIN worksop Sofia May 06 7/16 Pseudo-prognostic T scee in ALARO Procedure (1) n d dt f ( )
8 16 t ALADIN worksop Sofia May 06 8/16 Pseudo-prognostic T scee in ALARO RMC01 atc subgrid scae turbuence scee ( fu T scee ) and siiarity aws (Monin-Obukov) at surface extension of RMC01: extend tis to te woe dept of te atospere (not just ) z
9 Pseudo-prognostic T scee in ALARO 16 t ALADIN worksop Sofia May 06 9/16 Procedure (2) ) ( f dt d n 2 1 n? 3? 1 Te ony tuning paraeter: 5 0.
10 10/16 Agoritics tree eve stenci in te vertica for te Newtonian reaxation ( s are on af eves) [a reaxation for a given ayer is a weigted average of reaxations on neigbouring af eves] suc a reaxation operator is copatibe wit te diffusion one te atrix is diagona doinant and te soution is ineary stabe ake sure tat te diffusion part is doinant (no osciating ode coing fro 16 t ALADIN worksop Sofia May 06 Pseudo-prognostic T scee in ALARO
11 16 t ALADIN worksop Sofia May 06 Pseudo-prognostic T scee in ALARO Resuts (1) 11/16 Acadeic test wit 1D ode: GABLS II experient
12 16 t ALADIN worksop Sofia May 06 Pseudo-prognostic T scee in ALARO Resuts (2) Acadeic test wit 1D ode: GABLS II experient 12/16
13 16 t ALADIN worksop Sofia May 06 13/16 Pseudo-prognostic T scee in ALARO Resuts (3) T vertica crosssection. T Situation wit strong barocinic zone. Loca T axiu were te tropopause fods down
14 16 t ALADIN worksop Sofia May 06 14/16 Pseudo-prognostic T scee in ALARO Resuts (4) Parae suite scores Dec 2005 RMS difference aps pt Oper vs TMPs (8 days): eft geopotentia (); rigt: teperature (). Negative vaues (coor) -> e-suite is better.
15 16 t ALADIN worksop Sofia May 06 15/16 Pseudo-prognostic T scee in ALARO Resuts (5) Parae suite scores Dec 2005 Z500 T850 RH850 W700 Bias: back soid: operationa red dased: pt
16 16 t ALADIN worksop Sofia May 06 16/16 Pseudo-prognostic T scee in ALARO Concusions tie stabiity for ong tie steps stabe vertica staggering - fu eve T vaues no probes wit SL advection anti-fibriation treatent is very easiy appicabe s are on af eves suitabe coice of fixes potentia probes SLHD works we wit precise SL interpoators (not necessary to use QM) pt is abe to iic ft - provided one can copute differenty taking into account ore precisey sear and buoyancy production/consuption and ixing entg specification as we (future work...)
17 Pseudo-prognostic T scee in ALARO 16 t ALADIN worksop Sofia May 06 17/16 Procedure (2) ) ( f dt d n 2 1 n R? 3? Te ony tuning paraeter:
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