NCEP Daily Global Analyses
Brief Description:
- NCEP Daily Global Analyses.
Temporal Coverage:
- Daily mean values 1979/12/01 to present.
- Daily Long Terms means means for years 1991-2020.
Spatial Coverage:
- 2.5 degree latitude x 2.5 degree longitude global grid (144x73).
- 90.0N - 90.S, 0.0E - 357.5E.
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: (FTP Access)
Variable | Statistic | Level | Download File (size) | Create Plot/Subset |
---|---|---|---|---|
Zonal Wind | Daily Mean | Pressure | uwnd.yyyy.nc | ![]() |
Meridional Wind | Daily Mean | Pressure | vwnd.yyyy.nc | ![]() |
Air temperature | Daily Mean | Pressure | air.yyyy.nc | ![]() |
Geopotential Height | Daily Mean | Pressure | hgt.yyyy.nc | ![]() |
Relative Humidity | Daily Mean | Pressure | rhum.yyyy.nc | ![]() |
Sea Level Pressure | Daily Mean | Pressure | slp.yyyy.nc | ![]() |
Surface Pressure | Daily Mean | Surface | srfp.yyyy.nc | ![]() |
Tropopause pressure | Daily Mean | Tropopause | trpp.yyyy.nc | ![]() |
Tropopause temperature | Daily Mean | Tropopause | trpt.yyyy.nc | ![]() |
Precipitable water | Daily Mean | Column | pr_wtr.yyyy.nc | ![]() |
Plus files with .sfc. as the first infix for the surface levels for the variables air, rhum, uwnd, and vwnd.
Variable | Statistic | Level | Download File (size) | Create Plot/Subset |
---|---|---|---|---|
Zonal Wind | Mean | Surface | uwnd.sfc.yyyy.nc | ![]() |
Meridional Wind | Mean | Surface | vwnd.sfc.yyyy.nc | ![]() |
Air Temperature | Mean | Surface | air.sfc.yyyy.nc | ![]() |
Relative Humidity | Mean | Surface | rhum.sfc.yyyy.nc | ![]() |
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/ncep/)
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 PSL, 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 PSL, Boulder, Colorado, USA, from their Web site at / in any documents or publications using these data. We would also appreciate receiving a copy of the relevant publications. This will help PSL 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 Laboratory: Data Management
NOAA/ESRL/PSL
325 Broadway
Boulder, CO 80305-3328
psl.data@noaa.gov
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