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Dataset Title:  COADS Surface Marine Observations, Release 2, 1854-1993
Dataset ID:  pmelCoads RSS Subscribe
Institution:  NOAA, NCAR
Information:  Summary | Variables | Background | Make A Graph

Dimensions Start Stride Stop  Size    Spacing
time (UTC)      1680    30 days 10:28:40 (uneven)
latitude (degrees_north)      90    2.0 (even)
longitude (degrees_east)      180    2.0 (even)
 
Grid Variables (which always also download all of the dimension variables)
air (Air Temperature, degree_C)
nair (Number of air Observations)
cldc (Cloudiness, okta)
ncldc (Number of cldc Observations)
lflx (Latent Heat Parameter, grams/kg m/s)
nlflx (Number of lflx Observations)
rhum (Relative Humidity, percent)
nrhum (Number of rhum Observations)
sflx (Sensible Heat Parameter, degree_C m s-1)
nsflx (Number of sflx Observations)
shum (Specific Humidity, gm kg-1)
nshum (Number of shum Observations)
slp (Sea Level Pressure, mb)
nslp (Number of slp Observations)
sst (Sea Surface Temperature, deg C)
nsst (Number of sst Observations)
ustr (Zonal Pseudostress, m**/s**2)
nustr (Number of ustr Observations)
uwnd (Zonal Wind, m s-1)
nuwnd (Number of uwnd Observations)
vstr (Meridional Pseudostress, m**/s**2)
nvstr (Number of vstr Observations)
vwnd (Meridional Wind, m s-1)
nvwnd (Number of vwnd Observations)
wspd (Wind Speed, m s-1)
nwspd (Number of wspd Observations)

File type:

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range -3.6593856e+9, 7.559136e+8;
    String axis "T";
    String edges "TIMEedges";
    String ioos_category "Time";
    String long_name "Time";
    String point_spacing "uneven";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range -89.0, 89.0;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String point_spacing "even";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range 1.0, 359.0;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String point_spacing "even";
    String standard_name "longitude";
    String units "degrees_east";
  }
  air {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 40.0;
    Float64 colorBarMinimum -10.0;
    String history "From all_coads_grid";
    String ioos_category "Temperature";
    String long_name "Air Temperature";
    Float32 missing_value -1.0E34;
    String standard_name "air_temperature";
    String units "degree_C";
  }
  nair {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Temperature";
    String long_name "Number of air Observations";
    Float32 missing_value -1.0E34;
  }
  cldc {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String history "From all_coads_grid";
    String ioos_category "Meteorology";
    String long_name "Cloudiness";
    Float32 missing_value -1.0E34;
    String standard_name "cloud_area_fraction";
    String units "okta";
  }
  ncldc {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Meteorology";
    String long_name "Number of cldc Observations";
    Float32 missing_value -1.0E34;
  }
  lflx {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum -50.0;
    String history "From all_coads_grid";
    String ioos_category "Heat Flux";
    String long_name "Latent Heat Parameter";
    Float32 missing_value -1.0E34;
    String standard_name "surface_upward_latent_heat_flux";
    String units "grams/kg m/s";
  }
  nlflx {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Heat Flux";
    String long_name "Number of lflx Observations";
    Float32 missing_value -1.0E34;
  }
  rhum {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 50.0;
    String history "From all_coads_grid";
    String ioos_category "Meteorology";
    String long_name "Relative Humidity";
    Float32 missing_value -1.0E34;
    String standard_name "relative_humidity";
    String units "percent";
  }
  nrhum {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Meteorology";
    String long_name "Number of rhum Observations";
    Float32 missing_value -1.0E34;
  }
  sflx {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum -50.0;
    String history "From all_coads_grid";
    String ioos_category "Heat Flux";
    String long_name "Sensible Heat Parameter";
    Float32 missing_value -1.0E34;
    String standard_name "surface_upward_sensible_heat_flux";
    String units "degree_C m s-1";
  }
  nsflx {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Heat Flux";
    String long_name "Number of sflx Observations";
    Float32 missing_value -1.0E34;
  }
  shum {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 30.0;
    Float64 colorBarMinimum 0.0;
    String history "From all_coads_grid";
    String ioos_category "Meteorology";
    String long_name "Specific Humidity";
    Float32 missing_value -1.0E34;
    String standard_name "specific_humidity";
    String units "gm kg-1";
  }
  nshum {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Meteorology";
    String long_name "Number of shum Observations";
    Float32 missing_value -1.0E34;
  }
  slp {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 1030.0;
    Float64 colorBarMinimum 970.0;
    String history "From all_coads_grid";
    String ioos_category "Meteorology";
    String long_name "Sea Level Pressure";
    Float32 missing_value -1.0E34;
    String standard_name "air_pressure";
    String units "mb";
  }
  nslp {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Heat Flux";
    String long_name "Number of slp Observations";
    Float32 missing_value -1.0E34;
  }
  sst {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String history "From all_coads_grid";
    String ioos_category "Temperature";
    String long_name "Sea Surface Temperature";
    Float32 missing_value -1.0E34;
    String standard_name "sea_surface_temperature";
    String units "deg C";
  }
  nsst {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Temperature";
    String long_name "Number of sst Observations";
    Float32 missing_value -1.0E34;
  }
  ustr {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 500.0;
    Float64 colorBarMinimum -500.0;
    String history "From all_coads_grid";
    String ioos_category "Wind";
    String long_name "Zonal Pseudostress";
    Float32 missing_value -1.0E34;
    String units "m**/s**2";
  }
  nustr {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Wind";
    String long_name "Number of ustr Observations";
    Float32 missing_value -1.0E34;
  }
  uwnd {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum -15.0;
    String history "From all_coads_grid";
    String ioos_category "Wind";
    String long_name "Zonal Wind";
    Float32 missing_value -1.0E34;
    String standard_name "eastward_wind";
    String units "m s-1";
  }
  nuwnd {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Wind";
    String long_name "Number of uwnd Observations";
    Float32 missing_value -1.0E34;
  }
  vstr {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 500.0;
    Float64 colorBarMinimum -500.0;
    String history "From all_coads_grid";
    String ioos_category "Wind";
    String long_name "Meridional Pseudostress";
    Float32 missing_value -1.0E34;
    String units "m**/s**2";
  }
  nvstr {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Wind";
    String long_name "Number of vstr Observations";
    Float32 missing_value -1.0E34;
  }
  vwnd {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum -15.0;
    String history "From all_coads_grid";
    String ioos_category "Wind";
    String long_name "Meridional Wind";
    Float32 missing_value -1.0E34;
    String standard_name "northward_wind";
    String units "m s-1";
  }
  nvwnd {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Wind";
    String long_name "Number of vwnd Observations";
    Float32 missing_value -1.0E34;
  }
  wspd {
    Float32 _FillValue -1.0E34;
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum 0.0;
    String history "From all_coads_grid";
    String ioos_category "Wind";
    String long_name "Wind Speed";
    Float32 missing_value -1.0E34;
    String standard_name "wind_speed";
    String units "m s-1";
  }
  nwspd {
    Float32 _FillValue -1.0E34;
    String history "From all_coads_grid";
    String ioos_category "Wind";
    String long_name "Number of wspd Observations";
    Float32 missing_value -1.0E34;
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "COARDS, CF-1.0, Unidata Dataset Discovery v1.0";
    String creator_name 
"S.D. Woodruff (NOAA ERL), H.F. Diaz (NOAA ERL), J.D. Elms (NOAA NCDC), and S.
J. Worley (NCAR)";
    String history 
"FERRET V4.11 (debug/no GUI) 19-Nov-95FERRET V4.20 (debug/no GUI) 12-Mar-96
2009-11-23 http://ferret.pmel.noaa.gov/thredds/dodsC/data/PMEL/COADS/coads_
air.cdf
2009-11-23 http://coastwatch.pfeg.noaa.gov/erddap/griddap/pmelCoads.das";
    String infoUrl "http://icoads.noaa.gov/egs_paper.html";
    String institution "NOAA, NCAR";
    String license 
"The data may be used and redistributed for free but is not intended 
for legal use, since it may contain inaccuracies. Neither the data 
Contributor, ERD, NOAA, nor the United States Government, nor any 
of their employees or contractors, makes any warranty, express or 
implied, including warranties of merchantability and fitness for a 
particular purpose, or assumes any legal liability for the accuracy, 
completeness, or usefulness, of this information.";
    String reference "Phys. Chem. Earth, Vol.23, No. 5-6, pp. 517-526, 1998";
    String sourceUrl "http://ferret.pmel.noaa.gov/thredds/dodsC/data/PMEL/COADS/coads_air.cdf";
    String standard_name_vocabulary "CF-11";
    String summary 
"The Comprehensive Ocean-Atmosphere Data Set (COADS) has been updated through 
a cooperative U.S. project since 1981, including vital international 
contributions. Quality controlled marine surface observations from ships 
have been supplemented in more recent years to include moored environmental 
buoys, drifting buoys, and near-surface measurements from oceanographic 
profiles. The data set now covers 142 years, 1854-1995. Monthly statistics 
of pseudo-fluxes and basic marine variables are calculated for each year 
using observed data falling within 2° latitude × 2° longitude boxes (1°×1° 
summaries are also available for 1960-93). Enhancements in data and metadata 
planned by the year 2000 as part of COADS Release 2 (~1820-1997) will 
concentrate on the basic observational records. In addition to new data 
sources, which will augment flux estimates through expanded coverage, 
planned enhancements include: a) usage of selected metadata from WMO Pub. 
No. 47 (ship instrumentation history) to improve the observational records 
back to about 1973; b) improvements in the reliability of the wind speed (\"
estimated/measured\") indicator; and c) bias adjustments of wind speed 
Beaufort estimates and anemometer measurements. 

Correspondence to: S. Woodruff";
    String title "COADS Surface Marine Observations, Release 2, 1854-1993";
  }
}

 

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request gridded data (for example, environmental data from satellites) and graphs of gridded data, via specially formed URLs.
The URLs specify everything: the dataset, the desired file type for the response, and the subset of data that you want to receive.
You can form these URLs by hand or with a computer program,
or (much easier) you can use the dataset's "Data Access Form" (oriented to requests for data)
or the dataset's "Make A Graph" form (oriented to requests for graphs and maps),
both of which generate the URL when the form is submitted.
griddap is a superset of the OPeNDAP DAP hyperslab protocol.

griddap request URLs must be in the form
   http://coastwatch.pfeg.noaa.gov/erddap/griddap/ datasetID fileType {?query}
For example,
   http://coastwatch.pfeg.noaa.gov/erddap/griddap/erdBAssta5day.htmlTable?sst[(2007-10-21T00:00:00)][0][(-75):100:(75)][(180):100:(360)]

For details, see the griddap Documentation.
 
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