sgpallruc20hybrX1.c1 and sgpruc20hybrX1.c1

pyeruc20isobX1.c1, sgpallruc20isobX1.c1, sgpruc20isobX1.c1, sgpsynruc20isobX1.c1

**sgpallruc60X1.c0 and sgpruc60X1.c1 **

The 60 km RUC was a 3-hourly analysis/forecast data analysis system. ARM routinely obtained the analysis and 0-hour RUC results every 3 hours. The analysis product was ingested as the primary source, and the 0-hour product used as a backup. However, when the analysis was not available, the 0-hour forecast was invariably missing as well. In this instance, the 3-hour or 6-hour forecast from a previous analysis was used. This information is documented in the data file header.

The following data streams were produced:

Dimensions:

sgpallruc60X1.c0 (8 files per day) |
sgpruc60X1.c1 (1 file per day) | |
---|---|---|

time | 1 (3-hr period) | 8 (3-hourly periods) |

x | 81 (all of RUC) | 12 (subset around SGP CART Site) |

y | 62 (all of RUC) | 14 (subset around SGP CART Site) |

pres | 37 | 37 |

- valid_time(time)
- forecast_period(time)
- [=-7777, analysis run (not a forecast);
- =3 or 6, when forecast from a preceding time is used to make up for a missing analysis run]

- pressure at constant pressure surface (hPa) (pres)
- latitude of the polar stereographic grid points (degrees North) (y,x)
- longitude of the polar stereographic grid points(degrees East) (y, x)
- pressure at ground surface (hPa) (time, y, x)
- geometric height (above mean sea level) (m) (time, pres, y, x)
- temperature (K) (time, pres, y, x)
- relative humidity (percent) (time, pres, y, x)
- X component of wind, oriented in the polar stereographic grid (m/s) (time, pres, y, x)
- Y component of wind, oriented in the polar stereographic grid (m/s) (time, pres, y, x)

in measurements below x=81, y=62, z=25

- u-component of wind (meters/second) ( z, y, x)
- v-component of wind (meters/second) ( z, y, x)
- montgomery stream function/gravity (meters) ( z, y, x)
- condensation pressure (millibars) (z, y, x)
- pressure (pascals) ( z, y, x)
- virtual potential temperature (degrees K) ( z, y, x)
- RUC mean sea level pressure (pascals) ( y,x)
- soil temperature (degrees K) ( y,x)
- sensible heat flux (W/m**2) ( y,x)
- latent heat flux (W/m**2) y,x)
- net radiation (W/m**2) (y,x)
- precipitation rate (Kg/m**2/s) ( y,x)
- large scale precipitation (Kg/m**2) ( y,x)
- convective precipitation (Kg/m**2) ( y,x)
- precipitable water (Kg/m**2) ( y,x)
- pressure at tropopause (pascals) ( y,x)
- potential temperature at tropopause (degrees K) ( y,x)
- u-component of wind at tropopause (meters/second) ( y,x)
- v-component of wind at tropopause (meters/second) ( y,x)
- convective available potential energy (J/kg) ( y,x)
- convective inhibition (J/kg) ( y,x)
- valid time and reference time
- longitude and latitude

in the following measurements x=151, y = 113, z = 40, ss=6

- geopotential Height (hybrid-b grid) (gpm) (time, x, y, z)
- pressure (hybrid-b grid) (Pa) (time, x, y, z)
- pressure at tropopause (Pa) (time, x, y)
- u-component of wind (hybrid-b grid)(m/s)(time, x, y, z)
- u-component of wind at topopause (m/s) (time, x, y)
- >v-component of wind (hybrid-b grid)(m/s)(time, x, y, z)
- v-component of wind at topopause (m/s) (time, x, y)
- pressure vertical velocity (hybrid-b grid) (Pa/s) (time, x, y, z)
- environmental temperature (hybrid-b grid) (K) (time, x, y, z)
- virtual potential temperature (hybrid-b grid) (K) (time, x, y, z)
- potential temperature at tropopause (K) (time, x, y)
- turbulent kinetic energy (hybrid-b grid) (J/kg) (time, x, y, z)
- relative humidity (hybrid-b grid) (percent) (time, x, y, z)
- mixing ratio of water vapor (hybrid-b grid) (kg/kg) (time, x, y, z)
- mixing ratio of cloud water (hybrid-b grid) (kg/kg) (time, x, y, z)
- mixing ratio of ice water (hybrid-b grid) (kg/kg) (time, x, y)
- mixing ratio of snow (hybrid-b grid) (kg/kg) (time, x, y, z)
- mixing ratio of graupel (hybrid-b grid) (kg/kg) (time, x, y, z)
- number concentration of ice particles (hybrid-b grid) (number/m^3) (time, x, y, z)
- precipitable water (kg/m^2) (time, x, y)
- convective available potential energy (J/kg) (time, x, y)
- convective inhibition (J/kg) (time, x, y)
- sensible heat flux at surface (w/m^2) (time, x, y)
- latent heat flux at surface (w/m^2) (time, x, y)
- net shortwave irradiance at surface (w/m^2) (time, x, y)
- net longwave irradiance at surface (w/m^2) (time, x, y)
- evapotranspiration flux near surface (w/m^2) (time, x, y)
- plant canopy surface water kg/m^2) (time, x, y)
- evaporation from bare soil at surface (w/m^2) (time, x, y)
- evaporation of canopy water near surface (w/m^2) (time, x, y)
- water condensation rate near surface (m/s) (time, x, y)
- rate of water dropping from canopy to ground (m/s) (time, x, y)
- precipitation rate at surface (kg/m^2/s) (time, x, y)
- resolvable scale precipitation at surface (kg/m^2) (time, x, y)
- sub-grid scale precipitation at surface (kg/m^2) (time, x, y)
- surface sub-surface soil temperature (K) (time, x, y, ss)
- surface, sub-surface soil volumetric moisture (fraction) (time, x, y, ss)
- surface, sub-surface soil moisture content (kg/m^2) (time, x, y, ss)
- snow accumulation over 3-hr (kg/m^2) (time, x, y)
- snow depth (m) (time, x, y)
- snow temperature at snow or top soil level (K) (time, x, y)
- surface runoff (kg/m^2) (time, x, y)
- sub-surface runoff (kg/m^2) (time, x, y)

in the following measurements x=151, y = 113, p = 37, m = 6

- geopotential height (p-grid*) (meters) (time, x, y, p)
- geopotential height at freezing level (meters) (time, x, y)
- geopotential height at top freezing level (meters) (time, x, y)
- earth surface height (meters) (x, y)
- planetary boundary height (meters) (time, x, y)
- cloud base height (meters)(time, x, y)
- cloud top height (meters)(time, x, y)
- convective cloud top height (meters)(time, x, y)
- equilibrium level height (meters)(time, x, y)
- visibility (meters)(time, x, y)
- altimeter setting (pascals) (time, x, y)
- pressure at mean sea level (pascals) (time, x, y)
- pressure at freezing level (pascals) (time, x, y)
- pressure at top freezing level (pascals) (time, x, y)
- pressure at maximum wind level (pascals) (time, x, y)
- maximum equivalent potential temperature presssure (pascals) (time, x, y)
- pressure at tropopause (pascals) (time, x, y)
- earth surface pressure (pascals) (time, x, y)
- pressure tendency (3-hr) pascals/second) (time, x, y)
- u-component of wind (p-grid*) (meters/second) (time,x,y,p)
- u-component of wind (m-grid**) (meters/second) (time,x,y,m)
- u-component of wind (10 m fixed height) (meters/second) (time, x, y,)
- u-component of wind at maximum wind level (meters/second) (time, x, y,)
- u-component of wind at tropopause (meters/second) (time, x, y,)
- v-component of wind (p-grid*) (meters/second) (time,x,y,p)
- v-component of wind (m-grid**) (meters/second) (time,x,y,m)
- v-component of wind (10 m fixed height) (meters/second) (time, x, y,)
- v-component of wind at maximum wind level (meters/second) (time, x, y,)
- v-component of wind at tropopause (meters/second) (time, x, y,)
- gust wind speed (meters/second) (time, x, y,)
- vertical velocity (p-grid*) (pascals/second) (time, x, y, p)
- vertical velocity (m-grid**) (pascals/second) (time, x, y, m)
- environmental temperature (p-grid*) (K) (time, x, y, p)
- environmental temperature (m-grid**) (K) (time, x, y, m)
- environmental temperature (2 m fixed height) (K) (time, x, y)
- dew point temperature (2 m fixed height) (K) (time, x, y)
- dew point depression (2 m fixed height) (K) (time, x, y)
- potential temperature (2 m fixed height) (K) (time, x, y)
- equivalent potential temperature (K) (time, x, y)
- potential temperature at tropopause (K) (time, x, y)
- lifted index (K) (time, x, y)
- best lifted index (K) (time, x, y)
- relative humidity (p-grid*) (percent) (time, x, y, p)
- relative humidity (m-grid**) (percent) (time, x, y, m)
- relative humidity at freezing level (percent) (time, x, y)
- relative humidity at top freezing level (percent) (time, x, y)
- relative humidity (2 m fixed height) (percent) (time, x, y)
- specific humidity (2 m fixed height) (percent) (time, x, y)
- precipitable water (kg/m^2) (time, x, y)
- convective available potential energy (J/kg) (time, x, y)
- convective inhibition (J/kg) (time, x, y)
- precipitation rate at surface (kg/m^2/s) (time, x, y)
- resolvable scale precipitation (3 hour) (kg/m^2) (time, x, y)
- resolvable Scale Precipitation (accumulated) (kg/m^2) (time, x, y)
- sub-grid Scale Precipitation (3 hr) (kg/m^2) (time, x, y)
- sub-grid Scale Precipitation (accumulated) (kg/m^2) (time, x, y)
- categorical rain (unitless) (time, x, y)
- categorical freezing rain (unitless) (time, x, y)
- categorical ice pellets (unitless) (time, x, y)
- categorical snow (unitless) (unitless) (time, x, y)
- storm-relative helicity 0-3 km (m^2/s^2) (time, x, y)
- u-component of storm motion (meters/second) (time, x, y)
- v-component of storm motion (meters/second) (time, x, y)
- soil moisture availability (percent) (time, x, y)
- snow accumulation over 3-hr (kg/m^2) (time, x, y)
- snow depth (meters) (time, x, y)
- water equivalent snow depth (mm) (time, x, y)
- surface runoff accumulated (kg/m^2) (time, x, y)
- sub-surface runoff (kg/m^2) (time, x, y)

*** p-grid 37 isobaric pressure levels**

**
** m-grid six pressure intervals (30-0,60-30,90-60,120-90,150-120,180-150) (mb above gnd)**

**sgpallruc20hybrX1.c1, sgpruc20hybrX1.c1 **

Same as sgpallruc40hybrX1.c1 with the following exceptions:

The number of vertical levels changes from 40 to 50

The following measurements are added:

- water vapor mixing ratio at surface (kg/kg) (time, x, y)
- water vapor mixing ratio, 2m fixed height (kg/kg) (time, x, y)
- 10 meter component u-wind (m/s) (time, x, y)
- 10 meter component v-wind (m/s) (time, x, y)
- 2 meter temperature (K) (time, x, y)
- snow density (kg/m^3) (time, x, y)
- water equivalent of snow depth (kg/m^2) (time, x, y)
- temperature inside snow or top soil level (K) (time, x, y)

The following measurement that was in sgpallruc40hybrX1.c1 is not in sgpallruc20hybrX1.c1

surface, sub-surface soil moisture content

**sgpallruc20isobX1.c1, sgpruc20isobX1.c1, sgpsynruc20isobX1.c1 **

Same as sgpallruc40isobX1.c1 but does not contain the measurement "altimeter setting"and contains an addition measurement:

temperature at tropopause (K) (time, x, y)

Beginning 5/27/2003 the following measurement was added: storm-relative helicity 0-1 km (m^2/s^2) (time, x,y)

Beginning 6/28/2005, all the RUC 20 data streams contain the following
new measurements:

- Convective available potential energy, 255-0 mb above ground (J/kg)
- Convective inhibition, 255-0 mb above ground (J/kg)
- Temperature at surface (K)