NCEP Daily Global Analyses
One-Line Description:
- NCEP Daily Global Analyses.
Temporal Coverage:
- Daily mean values 1979/12/01 to present.
- Monthly means 1979/01 to 1994/12 air temperature,u-wind and v-wind
- Daily Long Terms means means for years 1985-1996.
Spatial Coverage:
- 2.5 degree latitude x 2.5 degree longitude global grid (144x73).
- 89.75N - 89.75S, 0.25E - 359.75E.
Levels:
- Pressure levels at surface, 1000, 850, 700, 500, 400, 300, 250, 200, 150, 100, 70, 50 mb.
- Exceptions: rhum--surface, 1000-300 mb only,hgt--no surface data.
Update Schedule:
- Daily
Download/Plot Data:
Variable | Statistic | Level | Download File (size) | Create Plot/Subset |
---|---|---|---|---|
Zonal Wind | Daily Mean | Pressure | uwnd.1999.nc (92M) | |
Meridional Wind | Daily Mean | Pressure | vwnd.1999.nc (92M) | |
Air temperature | Daily Mean | Pressure | air.1999.nc (92M) | |
Geopotential Height | Daily Mean | Pressure | hgt.1999.nc (184M) | |
Relative Humidity | Daily Mean | Pressure | rhum.1999.nc (46M) | |
Sea Level Pressure | Daily Mean | Pressure | slp.1999.nc (8M) | |
Surface Pressure | Daily Mean | Surface | srfp.1999.nc (15M) | |
Tropopause pressure | Daily Mean | Tropopause | trpp.1999.nc (15M) | |
Tropopause temperature | Daily Mean | Tropopause | trpt.1999.nc (8M) | |
Precipitable water | Daily Mean | Column | rhum.1999.nc (8M) |
Plus files with .sfc. as the first infix for the surface levels for the variables air, rhum, uwnd, and vwnd.
Monthly mean file names are composed of variable and level abbreviations:
(variable).(statistic).nc
Variable | Statistic | Level | Download File (size) | Create Plot/Subset |
---|---|---|---|---|
Zonal Wind | Mean | Surface | uwnd.sfc.1999.nc (8M) | 8M |
Meridional Wind | Mean | Surface | vwnd.sfc.1999.nc (8M) | 8M |
Air Temperature | Mean | Surface | air.sfc.1999.nc (8M) | 8M |
Usage Restrictions:
- None
Detailed Description:
-
NB: The surface levels of the air temperature, relative humidity, u-wind
and v-wind pressure level files have been broken out into separate files.
Caveats:
- None
Related File Naming & Structure Information:
File Names:
- var.time.stat.nc (In directory: /Datasets/udel.airt.precip/)
Dataset Format and Size:
Missing Data:
- The data are interpolated to eliminate missing data in the dataset. However, the source data have significant gaps. This information is detailed in the file README.missing.
Citation:
- Please note: If you acquire NCEP Daily Global Analyses data products from PSD, we ask that you acknowledge us in your use of the data. This may be done by including text such as NCEP Daily Global Analyses data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at http://www.cdc.noaa.gov/ in any documents or publications using these data. We would also appreciate receiving a copy of the relevant publications. This will help PSD to justify keeping the NCEP Daily Global Analyses data set freely available online in the future. Thank you!
References:
- NMC, 1986. Packing and identification of NMC Grid Point Data.
- Randel, W.J., 1987. Global Atmospheric Circulation Statistics, 1000-1 mb. NCAR Technical Note TN-295+STR, National Center for Atmospheric Research, Boulder, CO, 245 pp.
- Trenberth, K.E., and J.G. Olson, 1988. Evaluation of NMC Global Analyses: 1979-87. NCAR Technical Note TN-299+STR, National Center for Atmospheric Research, Boulder, CO, 82 pp.
- Trenberth, K.E., and J.G. Olson, 1988. Intercomparison of NMC and ECMWF Global Analyses: 1980-1986. NCAR Technical Note TN-301+STR, National Center for Atmospheric Research, Boulder, CO, 81 pp.
Original Source:
- NCEP
Contact:
- Physical Sciences Division: Data Management
NOAA/ESRL/PSD
325 Broadway
Boulder, CO 80305-3328
esrl.psd.data@noaa.gov