DS3 ~Down-Scaling Simulation System

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DS3 Down-Scaling Simulation System
http//wind.gp.tohoku.ac.jp/
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????????????JMA-NHM?????????????????????????
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DS3???(1)
DS3?????
??????21JST init. ?RSM???????????????????????downl
oad
????????0405?????web????(?????)
??????????9JST init. ???????
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DS3???(2)

• ????(?????????)
• ???JMANHM(2005?10????)
• ???38?(???401120m?stretched??)
• SST????Merged SST NOAA OISST
• ????24km,6km??????1.5km???????
• ????????????24km,6km?Kain-Fritsch
• ??????(2005)??????????????

Merged SST
1.5km?????????
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Output from DS3 _at_today
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• http//ds3.gp.tohoku.ac.jp/

(????)
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???????
??(1)
DS3???????????????????? ??????????????? ?
JMA-NHM???????????????? ?????????????????????
????????? ? ??????????????????????
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??
??????????????????????????
?????????????????????????? (Ninomiya and
Mizuno,1985??)
??????????????????????????
?????????????????? ???????????????????????????????
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?????

• ???????????????
• ??????????????????
• ??????????????????

1?2003?6?????????? ????????????????? 2?SST??????
????????? ???????????????????? 3???????
?????????????
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???????(???????????????????????(???????)????)

• ??2001???2007???
• ??????????????
• ????????
• ???????????????
• ??????????
• ????????????????
• ???

2003????????
2003?6????????????????????????????????????????
??????????????????????????????????????
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???????
????2003?6?22?00UTC24?12UTC
???(39N,143E)???????
???????????? ????????? ???????????? ???
6/23-00UTC???(?????)
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???????

• ????????????
• ????????

???????????300m?????
???100m?????
???????????1km?????
?????-?????? ??????? (???CAOS????????)
(?????)
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????
????? ??????????(jmanhm-rel-02-00)
?????? ??????????(MANAL)
??? 20220258
????? 10km(???)?4km?1km?250m?100m
????? Warm-rain
???? 4km?????Kain-Fritsch????
SST ??????????Ver.1.0(NGSST) (0.05???????)
?????? Deardorff????
MANAL????????????????????????? ??????10km
??????4km?????????? ???????????100m???????
????? JMANHM
?????? ???????? (MANAL)
??? 10210258
????? 10km(???)?4km?1km?100m
?????? 39N,143E
????? Warm-rain
???? 4km??Kain-Fritsch????
SST NOAA-OISST(1???1????)
???? 1km???Deardorff?????100m????Mellor-Yamada Level3????
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????1/3-???????
????(MANAL)
????(MANAL)
??????????????????????23??????????????????????
????(???)
????(???)
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????2/3-????????
??
???
?????-????? ????????
???????-????? ????????
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SST(???????)????????????
???????(NGSST)
?????????????
0.05??? ????

• Deardorff????
• Mellor-Yamada Level 3????(MY3)

NOAA-OISST
1??? ?????
??????????NGSST??????????SST???2??????
(?????)
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????????????(2003?6????)
Deardorff/NGSST
Deardorff/OISST
SST?????
?????????????????????????? ????SST?????????? ?
JMA-NHM?????????????????????
LES???????????? ??????????????????????????
?????
MY3/NGSST
????
(?????)
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???????
??(2)
DS3?????????????????????????????????(?????????????
)?????? 1??????????????????????
2????????????????????????????
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Development and Applications of a High-resolution
LocalMeteorological Numerical Model(CFD) in
Cartesian Coordinate (Sha,2008)
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Table Outline of the CFD numerical model
SIMPLERGO (W.Sha, 2008)
Basic equations Non-hydrostatic/compressible Coordinate Cartesian Discretization approach Finite volume method Grid system Staggered Time integration scheme Implicit Advection Scheme 3rd upwind scheme(QUICK) Leonard(1979) Hayase et al.(1992) Solution method SIMPLER algorithm for the equations Patankar(1980) Sha et al.(1991) Technique for handling Blocking-off Method complex geometries Patankar(1980) Sha(2002) Turbulence scheme LES Lilly(1962) Smagorinsky(1963)
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?????????
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??????
?????(???) (Courtesy of Prof. Fujiyoshi)
?????????? ??????? (dxdydz50m)
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??????????
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??DS3??????????? ?????????????????????????????
?? ?JMA-NHM???CFD???????????????
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• Calculation Settings
• initial inflow condition
• linear increasing vertical profile of velocity u
  (Umax 5m/s at 1.2km , the domain top),
• and vertical temperature T with the lapse rate
  0.8K/100m
• domain size
• DX10km,DY4km, DZ1.2km
• grid numbers 200(x),80(y), 60(z)
• grid spacing ?x?y50m,?Z20m
• time step?t 1.0s
• integrated time 3600s

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Matsushima
?1200m
Ikeshima
?1500m
Ohikishima
9000m
4500m
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10m grid data
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??????????? (dxdydz10m)
10m grid data
???
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????????(???(z10m)???????????????u???????2?)
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?????????
TOPO?????
gt

GIS?????
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• ????????????????

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(Courtesy of Prof. H.Kawamura)