Title: Sensitivity Study of a Coupled Carbon Dioxide Meteorological Modeling System with Case Studies
1 Sensitivity Study of a Coupled Carbon Dioxide
Meteorological Modeling System with Case Studies
The NIRE CO2 _at_ ETA model
- András Zénó Gyöngyösi, Tamás Weidinger, László
Haszpra, Zsuzsanna Iványi and Hiroaki Kondo
2Overview
- Short model description
- NIRE
- ETA
- Implementation
- NIRE
- ETA
- Coupling of NIRE to ETA
- Sensitivity studies
- Case studies
- Conclusion, future works
3Model Description
- NIRE
- Mesoscale circulation model (simple dynamics)
- Dispersion model
- Boussinesq-approximation
- Anelastic equations
- Terrain following s-coordinate (vrbl. res.)
- Staggered (Arakawa) grid
- First order turbulent closure (K Richardson )
- Vertical diff implicit solver
- Horizontal diff just for numerical stability
- Srfc Monin-Obuhov Energy Balance Eq.
- Soil Thermal conductivity eq.
4Surface parameterization
- H2O passive scalar, saturation _at_ srfc
- No clouds, relevant in sfc heat balance
- CO2
- Vegetation (Photosynth.Res.)
- for each veg. mosaic gt synthesized flux
- Anthropogen
- area sources _at_ srfc (heating and traffic)
- large stacks plume rise (CONCAWE)
5Boundary conditioning Numerical integration
- Lateral bndry
- Flow relaxation zone
- Top bndry
- Sponge layer
- Initialization
- Dynamical init. spin-up
- Time integration Leap frog Forward each 20th
step to adjust numerical mode
6Implementation
- Surface files
- IGBP landcover landuse database (USGS)
- Sensitivity test
- Dynamics
- Superadiabatic stratification
- Strong wind
- Basin
- Carpathian Basin _at_ bndry nonlinear interaction
topography -- bndry
7Model bndry interacts w/ topography strong
nonlinear effects More effective bndry conditions
are necessary
8Sensitivity Study
Mixing layer depth (Convective PBL) _at_ different
cloud amounts
Time evolution of CO2 in the model domain
9The Meteorological driver
- NCEP/ETA model (EMS NWS/NOAA)
- Limited area NWP model
- Primitive hydrostatic eqs non-hydrost. Option
- Modified terrain following coordinate system
- Eta (modified sigma)
- approx horiz. srfs separatio nof lee flow
- sfc PBL param. sophisticated
10Adaptation
Adaptation of ETA
- Operational run for Central Europe
- Operational run for Central Europe
Budapest
Init bndry conds downloaded from NCEP every
morning
11Dynamical Test (non-hydrostatic option)
- Hydrostatic equations, non-hydrostatic effects
parameterized - Small-scale effect are more non-hydrost.
- Small impact on solutions
- In the standard run non-hydrost. Option not
implemented - DF init. not used
12The Mass field
Pressure falling (approaching system)
NH departure
9m
Psfc
H500
?h-.41.4 h55305620
13The Wind field
NH wind stronger more KE generation
NH departures associated with topography
14Coupling NIRE to ETA
- Super-adiabatic lapse rate ?instab
- Extreme wind speed ?
- instab _at_ lat top bndry
- Flow relax term ?
- changed to sine shape
- Top sponge layer enlarged
- Adiabat. adjustment
15A Case study
- Cold inversion in the Basin
- 02 February 2006
- Inversion case
- Convective boundary layer after the decay of the
inversion - 06 February 2006
- Convection case
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27Effect of a single large stack
- Plume rise (CONCAWE Briggs, 1968)
- 200 m high
- 280 m3/s _at_ 3000C
- 1000 t/day CO2 emission
- Located in the middle of the domain
28Time evolution of temperature
Inversion
Convection
29Temperature Profiles _at_ different time of the day
Inversion
Convection
30Time evolution of CO2
Inversion
Convection
31CO2 Profiles _at_ different time of the day
Inversion
Convection
3212 LST
3315 LST
3418 LST
3522 LST
36Conclusion
- NIRE is able to provide realistic meteorological
conditions in suitable initial and boundary
conditions taken from ETA - The modular structure of it makes them suitable
for PBL tests - The coupled system is able to calculate
concentration for different extreme
meteorological conditions
37Future works
- Introduction of newer parameterization schemes
into the CO2 model further sensitivity and case
studies - Daily coupled system runs for the estimation of
annual variation of surface fluxes - Estimation of annual Carbon budget of the
Carpatian Basin