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ICOADS Long Term Means

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:

  • The International Comprehensive Ocean-Atmosphere Data Set (ICOADS) is the most extensive collection of surface marine data available for the world ocean over the past two centuries.

Temporal Coverage:

  • Long term monthly means and percentage of years in climatology, derived from data for years 1971 - 2000.
  • Long term monthly means, derived from data for years 1950 - 1979.

Spatial Coverage:

  • 2.0 degree latitude x 2.0 degree longitude global grid (90x180).
  • 89.0N - 89.0S, 1.0E - 359.0E.

Levels:

  • Sea Surface

Update Schedule:

  • Static

Download/Plot Data:

  • Based on ICOADS Release 2.4 enhanced data.
Variable Statistic Level Download File Create Plot/Subset
Sea Surface Temperature (S) Long Term Mean
Percentage of Years in Climatology		 Surface sst.ltm.nc
sst.ltm.perc.nc		 plot
Air Temperature (A) Long Term Mean
Percentage of Years in Climatology		 Surface air.ltm.nc
air.ltm.perc.nc		 plot
Scalar Wind (W) Long Term Mean
Percentage of Years in Climatology		 Surface wspd.ltm.nc
wspd.ltm.perc.nc		 plot
U-wind (U) Long Term Mean
Percentage of Years in Climatology		 Surface uwnd.ltm.nc
uwnd.ltm.perc.nc		 plot
V-wind (V) Long Term Mean
Percentage of Years in Climatology		 Surface vwnd.ltm.nc
vwnd.ltm.perc.nc		 plot
Sea Level Pressure (P) Long Term Mean
Percentage of Years in Climatology		 Surface slp.ltm.nc
slp.ltm.perc.nc		 plot
Cloudiness (C) Long Term Mean
Percentage of Years in Climatology		 Surface cldc.ltm.nc
cldc.ltm.perc.nc		 plot
Specific Humidity (Q) Long Term Mean
Percentage of Years in Climatology		 Surface shum.ltm.nc
shum.ltm.perc.nc		 plot
Relative Humidity (R) Long Term Mean
Percentage of Years in Climatology		 Surface rhum.ltm.nc
rhum.ltm.perc.nc		 plot
Sea-air Temperature difference (S-A) Long Term Mean
Percentage of Years in Climatology		 Surface smina.ltm.nc
smina.ltm.perc.nc		 plot
Sensible Heat Parameter ([S-A]*W) Long Term Mean
Percentage of Years in Climatology		 Surface sflx.ltm.nc
sflx.ltm.perc.nc		 plot
Sat Sp Hum at SST minus Sp Hum (Qs-Q) Long Term Mean
Percentage of Years in Climatology		 Surface qsminq.ltm.nc
qsminq.ltm.perc.nc		 plot
Latent Heat Parameter ([Qs-Q]*W) Long Term Mean
Percentage of Years in Climatology		 Surface lflx.ltm.nc
lflx.ltm.perc.nc		 plot
U-wind Stress (U*W) Long Term Mean
Percentage of Years in Climatology		 Surface upstr.ltm.nc
upstr.ltm.perc.nc		 plot
V-wind Stress (V*W) Long Term Mean
Percentage of Years in Climatology		 Surface vpstr.ltm.nc
vpstr.ltm.perc.nc		 plot
Sensible Heat Trans Eastward Param (U*A) Long Term Mean
Percentage of Years in Climatology		 Surface uairt.ltm.nc
uairt.ltm.perc.nc		 plot
Sensible Heat Trans Northward Param (V*A) Long Term Mean
Percentage of Years in Climatology		 Surface vairt.ltm.nc
vairt.ltm.perc.nc		 plot
Latent Heat Trans Eastward Param (U*Q) Long Term Mean
Percentage of Years in Climatology		 Surface uspeh.ltm.nc
uspeh.ltm.perc.nc		 plot
Latent Heat Trans Northward Param (V*Q) Long Term Mean
Percentage of Years in Climatology		 Surface vspeh.ltm.nc
vspeh.ltm.perc.nc		 plot
Zonal Latent Heat Parameter (U*[Qs-Q]) Long Term Mean
Percentage of Years in Climatology		 Surface ulflx.ltm.nc
ulflx.ltm.perc.nc		 plot
Meridional Latent Heat Parameter (V*[Qs-Q]) Long Term Mean
Percentage of Years in Climatology		 Surface vlflx.ltm.nc
vlflx.ltm.perc.nc		 plot
Scalar Wind cubed (W*W*W) Long Term Mean
Percentage of Years in Climatology		 Surface wspd3.ltm.nc
wspd3.ltm.perc.nc		 plot
  • Based on original COADS Release 1 (1854-1979) data.
Variable Statistic Level Download File Create Plot/Subset
Sea Surface Temperature (S) Long Term Mean Surface sst.ltm.nc plot
Air Temperature (A) Long Term Mean Surface air.ltm.nc plot
Scalar Wind (W) Long Term Mean Surface wspd.ltm.nc plot
U-wind (U) Long Term Mean Surface uwnd.ltm.nc plot
V-wind (V) Long Term Mean Surface vwnd.ltm.nc plot
Sea Level Pressure (P) Long Term Mean Surface slp.ltm.nc plot
Cloudiness (C) Long Term Mean Surface cldc.ltm.nc plot
Specific Humidity (Q) Long Term Mean Surface shum.ltm.nc plot
Relative Humidity (R) Long Term Mean Surface rhum.ltm.nc plot
Sensible Heat Parameter ([S-A]*W) Long Term Mean Surface sflx.ltm.nc plot
Latent Heat Parameter ([Qs-Q]*W) Long Term Mean Surface lflx.ltm.nc plot
U-wind Stress (U*W) Long Term Mean Surface upstr.ltm.nc plot
V-wind Stress (V*W) Long Term Mean Surface vpstr.ltm.nc plot

Usage Restrictions:

  • None

Detailed Description:

  • Simple long term monthly mean and percentage of years in climatology files constructed from ICOADS Release 2.4 enhanced data.
  • Simple long term monthly mean files constructed from the original COADS Release 1 (1854-1979) data.
The Live Access Server provides extensive capabilities for visualization and subsetting of ICOADS netCDF files (note: currently unavailable due to PSD website transition issues). Please refer to the ICOADS Website for more information about the ICOADS project, observational and summary products, and associated metadata.

Caveats:

Related File Naming & Structure Information:

File Names:

  • var.stat[.perc].nc   (In directory: /Datasets/icoads/2degree/enh/LTMs1971-2000)
  • var.stat.nc   (In directory: /Datasets/icoads/2degree/LTMs1950-1979)

Dataset Format and Size:

  • PSD standard NetCDF >392 Kbyte file for each long term mean and percentage of years in climatology files (packed).
  • PSD standard NetCDF >781 Kbyte file for each long term mean wspd3 file.

Missing Data:

  • Missing data is flagged with a value of 32766s.

Citation:

  • Please note: If you acquire ICOADS 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 ICOADS data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at http://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 ICOADS data set freely available online in the future. Thank you!

References:

Original Source:

  • Multinational. The US contribution is the result of a cooperative project between the National Oceanic and Atmospheric Administration (NOAA)--specifically its Earth System Research Laboratory (ESRL), its National Climatic Data Center (NCDC), and the Cooperative Institute for Research in Environmental Sciences (CIRES), conducted jointly with the University of Colorado--and the National Science Foundation's National Center for Atmospheric Research (NCAR).

Contact:

  • NetCDF questions:

    Physical Sciences Division: Data Management
    NOAA/ESRL/PSD
    325 Broadway
    Boulder, CO 80305-3328
    esrl.psd.data@noaa.gov
  • Data questions:

    Scott D. Woodruff, IT Specialist
    NOAA Earth System Research Laboratory (R/PSD3)
    325 Broadway
    Boulder, CO 80305 USA
    Phone: +1 303-497-6747
    FAX: +1 303-497-6181
    e-mail: Scott.D.Woodruff@noaa.gov