NODC (Levitus) World Ocean Atlas 1998
Go To: Temporal Coverage | Spatial Coverage | Levels | Update Schedule | Download/Plot Data | Restrictions | Details | Caveats | File Naming | Citation | References | Original Source | Contact
One-Line Description:
- NODC (Levitus) World Ocean Atlas Data 1998
Temporal Coverage:
- Long term annual means, derived from data for years 1900 - 1997.
- Long term seasonal means, derived from data for years 1900 - 1997.
- Long term monthly means, derived from data for years 1900 - 1997.
Spatial Coverage:
- 1.0 degree latitude x 1.0 degree longitude global grid (180x360).
- 89.5N - 89.5S 0.5E - 359.5E.
- 5.0 degree latitude x 5.0 degree longitude global grid (36x72).
- 87.5N - 87.5S, 2.5E - 357.5E.
Levels:
- Depth in meters at 0.0, 10.0, 20.0, 30.0, 50.0, 75.0, 100.0, 125.0, 150.0, 200.0, 250.0, 300.0, 400.0, 500.0, 600.0, 700.0, 800.0, 900.0, 1000.0, 1100.0, 1200.0, 1300.0, 1400.0, 1500.0, 1750.0, 2000.0, 2500.0, 3000.0, 3500.0, 4000.0, 4500.0, 5000.0, 5500.0.
- Depth in meters at 0.0, 10.0, 20.0, 30.0, 50.0, 75.0, 100.0, 125.0, 150.0, 200.0, 250.0, 300.0, 400.0, 500.0, 600.0, 700.0, 800.0, 900.0, 1000.0, 1100.0, 1200.0, 1300.0, 1400.0, 1500.0.
Update Schedule:
- Static
Download/Plot Data:
Variable | Statistic | Level | Download File | Create Plot/Subset |
---|---|---|---|---|
Ocean Temperature 1 degree | Long Term Mean | Multiple | ![]() | |
Ocean Salinity 1 degree | Long Term Mean | Multiple | ![]() | |
Ocean Temperature 5 degree | Long Term Mean | Multiple | ![]() | |
Ocean Salinity 5 degree | Long Term Mean | Multiple | ![]() | |
Basin Index | Mask | Multiple | basin.nc | |
Maximum Land/Sea Depth Index | Mask | landseadepth.nc |
Usage Restrictions:
- None
Detailed Description:
- The atlas contains annual, seasonal, and monthly long term means for temperature and salinity at multiple depths. Several statistics, including nobs are included in separate files, along with two "mask" files.
Caveats:
- None
Related File Naming & Structure Information:
File Names:
- var/time/var2.stat res.nc (In directory: /Datasets/nodc.woa98/)
- where var is one of:
- temperat - ocean temperature
- salinity - ocean salinity
- time is one of:
- annual
- monthly
- seasonal
- monthly
- var2 is one of:
- otemp - ocean temperature
- salt - ocean salinity
- stat is one of:
- anal - analyzed mean
- dd - data distribution (basically number of observations)
- gp - grid point (number of cells influencing this cell's value)
- ma - anomaly; annual mean subtracted
- oa - analyzed annual mean subtracted from raw mean
- raw - raw (AKA unanalyzed) mean
- sd - standard deviation
- se - standard error
- dd - data distribution (basically number of observations)
- and res is either:
- 1deg - 1 degree grid
- 5deg - 5 degree grid
OpenDap File Names:
- >http://www.cdc.noaa.gov/thredds/dodsC/Datasets/nodc.woa98/var/time/var2.stat res.nc
Dataset Format and Size:
- PSD standard NetCDF 344 Kbyte file for each annual 5 degree file.
- PSD standard NetCDF 1 Mbyte file for each seasonal 5 degree file.
- PSD standard NetCDF 3 Mbyte file for each monthly 5 degree file.
- PSD standard NetCDF 9 Mbyte file for each annual 1 degree file (each grid point file half the size).
- PSD standard NetCDF 34 Mbyte file for each seasonal 1 degree file (each grid point file half the size).
- PSD standard NetCDF 75 Mbyte file for each monthly 1 degree file (each grid point file half the size).
Missing Data:
- Missing data is flagged with a value of 32767s.
- Missing data is flagged with a value of -9.96921e+36f.
- A mask variable can be used to determine which points are ocean points and the number of valid levels.
Citation:
- Please note: If you acquire NODC_WOA98 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 NODC_WOA98 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 NODC_WOA98 data set freely available online in the future. Thank you!
References:
Original Source:
- National Oceanographic Data Center, NOAA, Washington, D.C.
Contact:
- Physical Sciences Division: Data Management
NOAA/ESRL/PSD
325 Broadway
Boulder, CO 80305-3328
esrl.psd.data@noaa.gov