NOAA Daily (non-interpolated) Outgoing Longwave Radiation (OLR)
One-Line Description:
- Daily, non-interpolated Outgoing Longwave Radiation (OLR).
Temporal Coverage:
- Daily values from 2002/01/01 to present (from twice daily Advanced Very High Resolution Radiometer (AVHRR) soundings for OLR).
Spatial Coverage:
- 2.5 degree latitude x 2.5 degree longitude global grid (144x73).
- 90N - 90.0S, 0.0E - 357.5E.
Levels:
- N/A
Update Schedule:
- Daily
Download/Plot Data:
| Variable | Statistic | Level | Download File | Create Plot/Subset |
|---|---|---|---|---|
| Outgoing Longwave Radiation | Mean (Daily) | Top of Atmosphere | olr.day.mean.nc |  |
Usage Restrictions:
- None but any feedback would be useful.
Detailed Description:
-
OLR data from NCAR archives, with gaps.
Example FORTRAN code that will read the data from the netCDF file can be found in ftp://ftp.cdc.noaa.gov/Datasets/interp_OLR/readolr.f
Caveats:
- New satellite source.
- As of 2005/08/07, this data set was switched from the NOAA-16 (last day 2005/08/07) satellite to the NOAA-18 satellite. The NOAA-18 bird crosses the equator at 0130 and 1330.
-
The sun-synchronous orbit means that at some locations and times 'night' will follow 'day', while at others 'day' will follow 'night', and there is a longitude at which the local time switches by nearly 24 hours. However, taking a daily mean of the day and night passes, as is done for this dataset, avoids the issue of which is observed first, and serves to reduce the effective time jump that occurs at the aforementioned longitude to 12 hours.
Related File Naming & Structure Information:
File Names:
- var.time.stat.nc (In directory: /Datasets/uninterp_OLR/)
Dataset Format and Size:
- PSD standard NetCDF 311 Mbyte file for each monthly file (packed).
- PSD standard NetCDF 30 Mbyte file for each long term mean file (packed).
Missing Data:
- Missing data is flagged with a value of 32767s.
Citation:
- Please note: If you acquire Uninterpolated OLR 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 Uninterpolated OLR 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 Uninterpolated OLR data set freely available online in the future. Thank you!
References:
- None
Original Source:
- We retrieve data directly from NOAAS's National Center for Environmental Prediction (NCEP).
Contact:
- Physical Sciences Division: Data Management
NOAA/ESRL/PSD
325 Broadway
Boulder, CO 80305-3328
esrl.psd.data@noaa.gov