Restrictions | Details | Caveats | File Naming | Citation | References | Original Source | Contact
NOAA's PRECipitation REConstruction over Land (PREC/L)
Mean files have been converted to netCDF4-classic formatBrief Description:
- NOAA's Precipitation Reconstruction over Land (PREC/L)
Temporal Coverage:
Spatial Coverage:
|
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Levels:
- Surface
Update Schedule:
- Near Real-time at NOAA/CPC
Download/Plot Data:
Variable | Statistic | Download File | Create Plot/Subset |
---|---|---|---|
Precipitation | Mean | precip.mon.mean.2.5x2.5.nc | ![]() |
Precipitation | Number of Gauges | precip.mon.number_gauges.2.5x2.5.nc | ![]() |
Precipitation | Long Term Mean | precip.mon.ltm.2.5x2.5.nc | ![]() |
Precipitation | Mean | precip.mon.mean.1x1.nc | ![]() |
Precipitation | Number of Gauges | precip.mon.number_gauges.1x1.nc | ![]() |
Precipitation | Long Term Mean | precip.mon.ltm.1x1.nc | ![]() |
Precipitation | Mean | precip.mon.mean.0.5x0.5.nc | ![]() |
Precipitation | Number of Gauges | precip.mon.number_gauges.0.5x0.5.nc | ![]() |
Precipitation | Long Term Mean | precip.mon.ltm.0.5x0.5.nc | ![]() |
Usage Restrictions:
- None
Detailed Description:
- The monthly data set consists of three files containing monthly averaged precipitation totals. Precipitation is available at 3 spatial resolutions. The global analyses are defined by interpolation of gauge observations over land (PREC/L) and by EOF recon- struction of historical observations over ocean (PREC/O). Gauge observations are from over 17 000 stations collected in the Global Historical Climatology Network (GHCN), version 2, and the Climate Anomaly Monitoring System (CAMS) datasets. An OI technique of Gandin was used to assimilate the observations. The mean distribution and annual cycle of precipitation observed in the PREC/L showed good agreement with those in several published gauge-based datasets, and the anomaly patterns associated with ENSO resemble those found in previous studies. All maps are stored using a landmask as smoothing puts values well over the oceans. The 1x1 and 0.5x0.5 are stored with a from CPC at their ftp site which contains 1's and 0s. The 2.5x2.5 is stored using the CPC provided % land file. It has values for each gridbox from 0 to 100. We stored all values where the values were >0. You may decide to further mask the data using their land file and a different cutoff.
Caveats:
- None
Related File Naming & Structure Information:
File Names:
- /Datasets/precl/2.5deg/precip.mon.mean.2.5x2.5.nc.
- /Datasets/precl/2.5deg/precip.mon.ltm.2.5x2.5.nc.
- /Datasets/precl/1.0deg/precip.mon.mean.1x1.nc.
- /Datasets/precl/1.0deg/precip.mon.ltm.1x1.nc.
- /Datasets/precl/0.5deg/precip.mon.mean.0.5x0.5.nc
- /Datasets/precl/0.5deg/precip.mon.ltm.0.5x0.5.nc
OpenDap File Names:
- https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/precl/2.5deg/precip.mon.mean.2.5x2.5.nc
- https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/precl/2.5deg/precip.mon.ltm.2.5x2.5.nc
- https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/precl/1.0deg/precip.mon.mean.1x1.nc
- https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/precl/1.0deg/precip.mon.ltm.11.nc
- https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/precl/0.5deg/precip.mon.mean.0.5x0.5.nc
- https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/precl/0.5deg/precip.mon.ltm.0.5x0.5.nc
Dataset Format and Size:
- PSD standard NetCDF 31 Mbyte file for each monthly file.
- PSD standard NetCDF 195 Mbyte file for 1x1 monthly file.
- PSD standard NetCDF 746 Mbyte file for 0.5x0.5 each monthly file.
Missing Data:
- Missing data is flagged with a value of -9.96921e+36f.
Citation:
- Chen, M., P. Xie, J. E. Janowiak, and P. A. Arkin, 2002: Global Land Precipitation: A 50-yr Monthly Analysis Based on Gauge Observations, J. of Hydrometeorology, 3, 249-266
- Please note: If you acquire PRECL Precipitation 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 PRECL Precipitation data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at https://www.esrl.noaa.gov/psd/ 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 PRECL Precipitation data set freely available online in the future. Thank you!
References:
-
Chen, M., P. Xie, J. E. Janowiak, and P. A. Arkin, 2002: Global Land Precipitation: A 50-yr Monthly Analysis Based on Gauge Observations, J. of Hydrometeorology, 3, 249-266
Original Source:
- Dr. May (Mingyue) Chen
Climate Prediction Center
5200 Auth Road, #805B
Camp Spings MD 20764
Tel: (301) 763-8000 ext. 7506
Fax: (301) 763-8125
E-mail: mingyue.chen@noaa.gov
original ftp: ftp://ftp.cpc.ncep.noaa.gov/precip/50yr/
Contact:
-
Physical Sciences Division: Data Management
NOAA/ESRL/PSD
325 Broadway
Boulder, CO 80305-3328
esrl.psd.data@noaa.gov
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