Data Access Form

Dataset Title:	Daily Ocean Variables from Satellite - Mixed Layer Depth - Estuary and Gulf of St. Lawrence
Institution:	Fisheries and Oceans Canada (Dataset ID: mpoDailySatelliteDataMld)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Files \| Make a graph

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Dimensions	Size	Spacing
time (UTC)	10397	1 day 0h 0m 32s (uneven)

latitude (degrees_north)	644	-0.01041667 (even)

longitude (degrees_east)	1527	0.01041667 (even)

Grid Variables (which always also download all of the dimension variables)

mld (mixed layer depth, m)

File type: (more information)

(Documentation / Bypass this form)

(Please be patient. It may take a while to get the data.)

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    UInt32 _ChunkSizes 512;
    String _CoordinateAxisType "Time";
    Float64 actual_range 8.836308e+8, 1.7821728e+9;
    String axis "T";
    String coverage_content_type "coordinate";
    String ioos_category "Time";
    String long_name "Time";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/";
    String nerc_standard_name "Date";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 45.20312500000001, 51.90104166666667;
    String axis "Y";
    String description "Latitude coordinates in decimal degree (degrees north)";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/CFSN0600/";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -71.296875, -55.401041666666664;
    String axis "X";
    String description "Longitude coordinates in decimal degree (degrees east)";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/CFSN0554/";
    String units "degrees_east";
  }
  mld {
    UInt32 _ChunkSizes 1, 644, 1527;
    Float32 _FillValue NaN;
    String colorBarPalette "KT_deep";
    String comment "Daily mixed layer depth from reanalysis product GLORYS12";
    String long_name "mixed layer depth";
    String references "https://doi.org/10.48670/moi-00021, https://doi.org/10.3389/feart.2021.698876";
    String source "MERCATOR GLORYS12V1 (Lellouche et al. 2021), https://help.marine.copernicus.eu/en/articles/5676870-how-is-the-ocean-mixed-layer-thickness-mlotst-variable-defined";
    String standard_name "ocean_mixed_layer_thickness_defined_by_sigma_theta";
    String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/CFSN0470/";
    String units "m";
  }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.8.1,hdf5=1.14.5";
    String cdm_data_type "Grid";
    String comment "Derived from the GLORYS12 ocean reanalysis (Mercator Ocean).";
    String Conventions "COARDS, CF-1.10, ACDD-1.3";
    String creator_email "julien.laliberte@dfo-mpo.gc.ca";
    String creator_identifier "https://orcid.org/0000-0001-6698-029X";
    String creator_institution "Fisheries and Oceans Canada, Maurice Lamontagne Institute";
    String creator_name "Julien Laliberte";
    String creator_type "person";
    Float64 Easternmost_Easting -55.401041666666664;
    Float64 geospatial_lat_max 51.90104166666667;
    Float64 geospatial_lat_min 45.20312500000001;
    Float64 geospatial_lat_resolution 0.010416666666666663;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -55.401041666666664;
    Float64 geospatial_lon_min -71.296875;
    Float64 geospatial_lon_resolution 0.010416666666666668;
    String geospatial_lon_units "degrees_east";
    String history 
"2026-10-16T21:13:21Z (remote files)
2026-10-16T21:13:21Z http://erddap.cioos.ca/erddap/griddap/mpoDailySatelliteDataMld.das";
    String infoUrl "https://catalogue.ogsl.ca/fr/dataset/ca-cioos_28435c4a-f309-47d1-905c-c89e27a3d3f9";
    String institution "Fisheries and Oceans Canada";
    String institution_identifier "https://ror.org/02qa1x782";
    String keywords "mixed layer depth, ocean colour, sea ice, sea surface salinity, sea surface temperature, wind";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "Open Government Licence - Canada";
    String licenseUrl "https://open.canada.ca/en/open-government-licence-canada";
    Float64 Northernmost_Northing 51.90104166666667;
    String platform "satellite";
    String platform_vocabulary "https://vocab.nerc.ac.uk/collection/L06/current/";
    String project "Coastal Environmental Baseline Program";
    String project_url "https://ogsl.ca/en/coastal-environment-baseline-program/";
    String related_dataset "(1) Daily Ocean Variables from Satellite - Chlorophyll a - Estuary and Gulf of St. Lawrence; (2) Daily Ocean Variables - Moon PAR - Estuary and Gulf of St. Lawrence; (3) Daily Ocean Variables from Satellite - Photosynthetically Available Radiation - Estuary and Gulf of St. Lawrence; (4) Daily Ocean Variables from Satellite - Sea Ice Concentration - Estuary and Gulf of St. Lawrence, (5) Daily Ocean Variables from Satellite - Sea Surface Salinity - Estuary and Gulf of St. Lawrence; (6) Daily Ocean Variables from Satellite - Sea Surface Temperature - Estuary and Gulf of St. Lawrence; (7) Daily Ocean Variables from Satellite - Wind Speed - Estuary and Gulf of St. Lawrence";
    String related_dataset_identifier "(1) https://erddap.ogsl.ca/erddap/griddap/mpoDailySatelliteDataChl.graph; (2) https://erddap.ogsl.ca/erddap/griddap/mpoDailySatelliteDataMoo.graph; (3) https://erddap.ogsl.ca/erddap/griddap/mpoDailySatelliteDataPar.graph; (4) https://erddap.ogsl.ca/erddap/griddap/mpoDailySatelliteDataSic.graph, (5) https://erddap.ogsl.ca/erddap/griddap/mpoDailySatelliteDataSss.graph; (6) https://erddap.ogsl.ca/erddap/griddap/mpoDailySatelliteDataSst.graph; (7) https://erddap.ogsl.ca/erddap/griddap/mpoDailySatelliteDataWsp.graph";
    String sourceUrl "(remote files)";
    Float64 Southernmost_Northing 45.20312500000001;
    String standard_name_vocabulary "CF Standard Name Table v86";
    String summary "Ocean Variables acquired daily by satellite in the estuary and gulf of St. Lawrence.";
    String time_coverage_end "2026-06-23";
    String time_coverage_start "1998-01-01";
    String title "Daily Ocean Variables from Satellite - Mixed Layer Depth - Estuary and Gulf of St. Lawrence";
    Float64 Westernmost_Easting -71.296875;
  }
}

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its projection constraints (external link)

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.