Geography Reference
In-Depth Information
Table 7.4 Parameterization scheme of physical processes in the model
Classification of schemes
Scheme option
Microphysics parameterization scheme
Bulk microphysics schemes introduced by Lin
et al.(1983)
Cumulus parameterization scheme
Grell-Devenyi ensemble
Boundary layer process scheme
YSU
Long-wave radiation scheme
CAM Long-wave radiation
Shortwave radiation scheme
CAM Shortwave radiation
Land surface process scheme
Noah land surface model
the meteorological observation data, which were used to validate the WRF model
in this study, were collected from European Climate Assessment & Dataset. 1
7.2.1.2 Scenario-Based Experiment Design
The Advanced Research WRF (ARW-WRF) is used in this study. The Lambert
projection is used, with the two standard parallels both being 57 N, central
meridian 48 E. The study area is located in European Russia, and it contains 192
grid cells in the east-west direction and 174 grid cells in the north-south direction.
The parameterization scheme of physical processes in the model (Table 7.4 )is
as follows. The Microphysics parameterization Scheme adopted the scheme
introduced by Lin et al. (1983). The cumulus parameterization scheme adopted the
Grell-Devenyi ensemble scheme. The boundary layer process scheme was fol-
lowed the scheme of Yonsei University (YSU). The long-wave radiation scheme
and shortwave radiation scheme were both the Community Atmosphere Model
(CAM) scheme, and the land surface process scheme was Noah land surface
model. The boundary buffer was set to be four layers of grid points, and the
boundary conditions adopted the relaxation scheme. The time interval of the model
integration was set to be 5 min, and that of the radiation process and cumulus
convection was 30 and 5 min, respectively. There were 27 layers in the vertical
direction, and the atmospheric pressure at the top layer was 50 hPa.
The experiment design in this study is as follows (Table 7.5 ). The simulation was
implemented with the land cover data in three separated years as the land surface.
The land cover data of the year 2000 (Fig. 7.6 ) with the USGS classification system
was used in the baseline scenario, while the land cover data of year 2010 and 2100
were used in the sensitivity tests. The monthly and seasonal simulation results were
compared. Firstly, the simulation results of monthly temperature in year 2010 was
used to validate the WRF model, then spatial difference of the near-surface tem-
perature in the winter between 2000 and 2010 were analyzed, and at last the monthly
near-surface temperature between 2010 and 2100 was compared.
1
For more information, please refer to http://eca.knmi.nl/dailydata/predefinedseries.php .
Search WWH ::




Custom Search