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ALARO10

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									ALARO10

 Status & Plans
G. Hello CNRM




  14th ALADIN Workshop Innsbruck, 1-4 June 2004
Status & Plans of ALARO10

        Why ALARO ?
        The workplan
        What has been done
        Foreseen troubles
             Why ALARO ?
A political choice for the medium term …
 Process started in Prague April 2003 (=>
  ALADIN-2 =AROME Limited Area
  Decentralized International Network)
 A choice between 3 different paths
 Prague feb 2004  a 3rd model for an
  intermediate step
Comparison
      From F. Bouttier AAA meeting
                         Effort
                         on
                         Aladin


                         on
                         Arome




                         on
                         Alaro
               Why ALARO ?
… leading to a scientific challenge
 To show the positive impact of a detailed physics
  at the regional scale
 To limit the unavoidable extra cost to reasonable
  values
 To transform a « research-oriented » physics on a
  « oper-oriented » one
      Main constraints
       Reasonable cost
       Max compatibility with AROME
       Schedule (before AROME .. It is an intermediate step)
          ALARO10 WorkPlan-04
A: build & evaluate the prototype
     ref name                             who                    With sub-projects
                                          G H, TK, arome
     a1   Building the prototype          people                Arome

     a2   Evaluation & test               G H,T K,?             ø
                                          JFG, N pristov, GH,
     b1   Intermittent radiation scheme   YB,MD                 Alad1,alaro-5
                                          JFG, BC, Fby, FW,
     b2   Sub-grid scale orography        JC, RM                Alad1,alaro-5
                                          TH, MB, JMP, TK,
     b3   Triggering of convection        LG                    Alad1,alaro-5

     b4   Adaptation to long time step    GH,DB,JFG,LG, EB
          Performance of the proto in
          the presence of shallow conv
     b5   & stratiform clouds             ?
B: optimization of the parametrizations
 What has been done ? A part

 Building ALARO10 prototype (a1 of
  WP04) with the help of Tomislav Kovacic
  and AROME people (YS, SM & gmme
  team)
    Add the parametrization of the convection
    (deep & shallow) to the AROME interface
    Test in 1D (GH)
    Test in 3D academic (TK)
    Test in 3D real case (GH &TK in progress)
                    Méso-NH                                                                         ALARO

                              Tent (T) mnh                                                          Tent (T) alaro


                                                                                                                 14000
                                             14000


                                                                                                                 12000
                                             12000



                                             10000                                                               10000




                                             8000                                                                    8000




                                             6000                                                                    6000




                                             4000                                                                    4000




                                             2000                                                                    2000




                                                0                                                                      0
-0,0020   -0,0015   -0,0010     -0,0005         0,0000   0,0005   0,0010-0,002   -0,0015   -0,001    -0,0005                0   0,0005   0,001




                                                                                                                            1D-Prototype
                         Méso-NH                                                                                              ALARO

                                                14000                                                                                 14000



                                                12000                                                                                 12000



                                                10000                                                                                 10000



                                                   8000                                                                                 8000



                                                   6000                                                                                 6000



                                                   4000                                                                                 4000



                                                   2000                                                                                 2000



                                                        0                                                                                  0
-5,E-07   -4,E-07   -3,E-07   -2,E-07    -1,E-07        0,E+00    1,E-07                3,E-07 -4,E-07
                                                                            2,E-07 -5,E-07               -3,E-07    -2,E-07   -1,E-07      0,E+00        1,E-07       2,E-07   3,E-07

                      Tent (rv) mnh     Tent (rc) mnh       Tent (ri) mnh                                  Tent (rv) alaro    Tent (rc) alaro       Tent (ri) alaro




                                                                                                                                                1D-Prototype
The Gard case: 2002-09-08   3D-Prototype
Méso-NH       ALARO




          Wind and theta at 850 hPa
                      3D-Prototype
Méso-NH      ALARO




          Ri at 200 hPa (ice clouds)
                      3D-Prototype
Méso-NH   ALARO




             Rv at 500 hPa
             3D-Prototype
  What has been done ? B part
 Optimization of the parametrizations (b of
  WP04)
    Radiation scheme (JFG, NP,MD, GH & YB)
  See session E Wednesday
    GWD (many people not a specific ALARO10
    work)
  See session E Wednesday
          Foreseen troubles
 Manpower: a balance to find between
  AROME « attraction » and ALARO
  « duty » + avoid dispersion & duplication
  (ALARO10-ALARO5)
 Many work and interesting scientific
  questions to have a cost effective version
  which does better than Aladin …and not
  much time
        Conclusion

 Contributors welcome !!!
Open questions & ? do not
  forget the A-A prototypes
     WG this afternoon

								
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