Profile & Samples - JMA High-Resolution GSM Data
File Path Naming Rule (Directories, Files)
| Grid Interval | Region | Layer | Initial Date | Initial Time |
File Name | |
|---|---|---|---|---|---|---|
| / | 0.25_0.25/ | 90.0_-5.0_30.0_195.0/ | Surface_layers/ | YYYYMMDD/ | HH0000/ | GSM_GPV_Rra2_Gll0p25deg_Lsurf_FDXXxx_grib2.bin |
| 90.0_-90.0_0.0_359.75/ | Surface_layers/ | YYYYMMDD/ | HH0000/ | GSM_GPV_Rgl_Gll0p25deg_Lsurf_FDXXxx_grib2.bin | ||
| 0.5_0.5/ | 90.0_-5.0_30.0_195.0/ | Surface_layers/ | YYYYMMDD/ | HH0000/ | GSM_GPV_Rra2_Gll0p5deg_Lsurf_FDXXxx_grib2.bin | |
| VVVVhPa/ | YYYYMMDD/ | HH0000/ | GSM_GPV_Rra2_Gll0p5deg_LVVVV_FDXXxx_grib2.bin | |||
| 90.0_-90.0_0.0_359.5/ | Surface_layers/ | YYYYMMDD/ | HH0000/ | GSM_GPV_Rgl_Gll0p5deg_Lsurf_FDXXxx_grib2.bin | ||
| Upper_air_layers/ | YYYYMMDD/ | HH0000/ | GSM_GPV_Rgl_Gll0p5deg_L-pall_FDXXxx_grib2.bin |
Legend:
- 0.25_0.25: 0.25 degrees (in grid interval)
- 0.5_0.5: 0.5 degrees (in grid interval)
- 90.0_-5.0_30_195.0: WMO Region II (bounded by 5S-90N and 30E-165W)
- 90.0_-90.0_0.0_359.75 or 90.0_-90.0_0.0_359.5: global
- Upper_air_layers: 1000 - 10hPa
- VVVVhPa: VVVV hPa level
- YYYYMMDD: initial date (e.g. “20181225” means “25 December, 2018”)
- HH0000: initial time (e.g. “180000” means “18UTC”)
Profile (Regions, Grids, File Size)
| Region | Grid Interval | Grid Size | Layer | Longitude Range | Latitude Range | File Size |
|---|---|---|---|---|---|---|
| WMO Region II | 0.25 degs. | 661×381 | Suface | 30E - 180 - 165W | 5S - 90N | 4MB |
| 0.5 degs. | 331×191 | Surface | 1MB | |||
| Upper_air (1000 - 10hPa) | 500-700KB | |||||
| Global | 0.25 degs. | 1440×721 | Surface | 0E - 180 - 0W | 90S - 90N | 17MB |
| 0.5 degs. | 720×361 | Surface | 4MB | |||
| Upper (all levels in one file) | 50MB |
Regions
- Global area
- WMO Region II area
Profile (Levels, Elements)
| Level | Number of Elements |
Elements |
|---|---|---|
| Surface | 11 | U, V, T, Rh, Ps, Psea, Rain, Cla, Clh, Clm, Cll |
| 1000hPa | 6 | U, V, T, Rh, Z, Omg |
| 975hPa | 6 | U, V, T, Rh, Z, Omg |
| 950hPa | 6 | U, V, T, Rh, Z, Omg |
| 925hPa | 6 | U, V, T, Rh, Z, Omg |
| 900hPa | 6 | U, V, T, Rh, Z, Omg |
| 850hPa | 8 | U, V, T, Rh, Z, Omg, Psi, Chi |
| 800hPa | 6 | U, V, T, Rh, Z, Omg |
| 700hPa | 6 | U, V, T, Rh, Z, Omg |
| 600hPa | 6 | U, V, T, Rh, Z, Omg |
| 500hPa | 7 | U, V, T, Rh, Z, Omg, Vor |
| 400hPa | 6 | U, V, T, Rh, Z, Omg |
| 300hPa | 6 | U, V, T, Rh, Z, Omg |
| 250hPa | 6 | U, V, T, Rh, Z, Omg |
| 200hPa | 8 | U, V, T, Rh, Z, Omg, Psi, Chi |
| 150hPa | 6 | U, V, T, Rh, Z, Omg |
| 100hPa | 6 | U, V, T, Rh, Z, Omg |
| 70hPa | 6 | U, V, T, Rh, Z, Omg |
| 50hPa | 6 | U, V, T, Rh, Z, Omg |
| 30hPa | 6 | U, V, T, Rh, Z, Omg |
| 20hPa | 6 | U, V, T, Rh, Z, Omg |
| 10hPa | 6 | U, V, T, Rh, Z, Omg |
Legend:
- U: U (zonal) component of wind (m/s)
- V: V (meridional) component of wind (m/s)
- T: temperature (K)
- Rh: relative humidity (%)
- Z: geopotential height (gpm)
- Omg: vertical velocity (Pa/s)
- Psi: stream function (m^2/s)
- Chi: velocity potential (m^2/s)
- Vor: relative vorticity (1/s)
- Ps: pressure (Pa)
- Psea: sea surface pressure (Pa)
- Rain: total precipitation (kg/m^2)
- Cla: total cloudiness (%)
- Clh: cloudiness (upper layer) (%)
- Clm: cloudiness (middle layer) (%)
- Cll: cloudiness (lower layer) (%)
Update Time Table
| GSM Initial Time (UTC) |
Forecast Time (days, hours) |
Update Time (UTC) |
|---|---|---|
| 0000 | 0000 to 0512 | 0400 |
| 0518 to 1100 | 0700 | |
| 0600 | 0000 to 0512 | 1000 |
| 1200 | 0000 to 0512 | 1600 |
| 0518 to 1100 | 1900 | |
| 1800 | 0000 to 0512 | 2200 |
Surface Topography
Geopotential of the model surface of GSM is given in GRIB format files.
Geopotential divided by the standard gravity (9.80665 m2.s-2) gives the geopotential height above the mean sea level.