気象モデルデータについて

Meteorological model data

気象モデルデータの利用について

Utilizing the weather model data

各気象機関の数値予報モデルなど、 気象モデルの風況データ(NetCDF形式)を流入境界条件として利用できます。

Wind data of the weather model (netCDF format), such as numerical weather prediction models of meteorological organizations, can be used as the inlet boundary condition.

気象モデルの格子は風況解析の計算格子より間隔が広いので、 計算格子の流入面の各格子点には、空間的に内挿された気象モデルデータが適用されます。 これにより、実際の気象に即した局所的な風況シミュレーションが可能となります。

The grid extent of weather models is wider than that of wind analyses. At each grid point on the inlet face of the computational grid, spatially interpolated weather model data is applied. Therefore, it is possible to simulate the local wind condition based on the actual weather.

なお、気象モデルデータを適用する場合は、 流入風向を気象モデルデータの最寄り地点における風向と一致させる必要があります。

When applying the weather model data, the inflow direction should be matched with the wind direction at the nearest point of the weather model data.

気象モデルNetCDFデータの例

Example of the NetCDF weather model data

• メソスケールモデル気圧面データ (MSM-P)
• Pressure-level data of meso-scale model (MSM-P)

dimensions:
	lon = 241 ;
	lat = 253 ;
	p = 16 ;
	time = 8 ;

variables:
	float lon(lon) ;
		lon:long_name = "longitude" ;
		lon:units = "degrees_east" ;
		lon:standard_name = "longitude" ;
	float lat(lat) ;
		lat:long_name = "latitude" ;
		lat:units = "degrees_north" ;
		lat:standard_name = "latitude" ;
	float p(p) ;
		p:long_name = "pressure level" ;
		p:standard_name = "air_pressure" ;
		p:units = "hPa" ;
	float time(time) ;
		time:long_name = "time" ;
		time:standard_name = "time" ;
		time:units = "hours since 2014-10-12 00:00:00+00:00" ;
	double z(time, p, lat, lon) ;
		z:long_name = "geopotential height" ;
		z:units = "m" ;
		z:standard_name = "geopotential_height" ;
	double w(time, p, lat, lon) ;
		w:long_name = "vertical velocity in p" ;
		w:units = "Pa/s" ;
		w:standard_name = "lagrangian_tendency_of_air_pressure" ;
	short u(time, p, lat, lon) ;
		u:scale_factor = 0.006116208155 ;
		u:add_offset = 0. ;
		u:long_name = "eastward component of wind" ;
		u:units = "m/s" ;
		u:standard_name = "eastward_wind" ;
	short v(time, p, lat, lon) ;
		v:scale_factor = 0.006116208155 ;
		v:add_offset = 0. ;
		v:long_name = "northward component of wind" ;
		v:units = "m/s" ;
		v:standard_name = "northward_wind" ;
	short temp(time, p, lat, lon) ;
		temp:scale_factor = 0.002613491379 ;
		temp:add_offset = 255.4004974 ;
		temp:long_name = "temperature" ;
		temp:units = "K" ;
		temp:standard_name = "air_temperature" ;
	short rh(time, p, lat, lon) ;
		rh:scale_factor = 0.002293577883 ;
		rh:add_offset = 75. ;
		rh:long_name = "relative humidity" ;
		rh:units = "%" ;
		rh:standard_name = "relative_humidity" ;