Data Access Form

Dataset Title:	SMOS BEC global SSS product v2 L4 un V2020 - REDUCED
Institution:	BEC, ICM-CSIC, Barcelona, Spain (Dataset ID: SMOS_SSS_L4_V2020_REDUCED)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Files \| Make a graph

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Dimensions	Size	Spacing
time (UTC)	3769	1 day 0h 1m 32s (uneven)

latitude (degrees_north)	720	0.25 (even)

longitude (degrees_east)	1440	0.25 (even)

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

sss (Level 4 Sea Surface Salinity, PSU)

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 1024;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.2959136e+9, 1.6218144e+9;
    String axis "T";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Time";
    String standard_name "time";
    String time "T";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range -90.0, 89.75;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range -180.0, 179.75;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  sss {
    UInt32 _ChunkSizes 1, 360, 720;
    Float32 _FillValue NaN;
    String description "Level 4 Sea Surface Salinity in Practical Salinity Units [psu]";
    String long_name "Level 4 Sea Surface Salinity";
    String standard_name "sea_water_practical_salinity";
    String units "PSU";
  }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.7.3,hdf5=1.10.6";
    String Acknowledgement "A complete description of the algorithms and quality assessment of the SMOS SSS product are described in Olmedo, E., et al.: Nine years of SMOS sea surface salinity global maps at the Barcelona Expert Center, Earth Syst. Sci. Data, 13, 857–888. This product has been developed by the Instituto de Ciencias del Mar / Barcelona Expert Center (CSIC) as part of the European Marine Observation and Data Network Physics (EMODnet Physics) - EASME/EMFF/2020/3.1.11/Lot4/SI2.838612. The development was also supported by the Ministry of Economy and Competitiviness, Spain, through the National R+D Plan under under Interact Project PID2020-114623RB-C31 and previous grants and by the European Space Agency.";
    String cdm_data_type "Grid";
    String comment "These data were produced at BEC as part of the Lambda project. Please, send your feedback to olmedo@icm.csic.es";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String copyright "BEC research products are freely distributed. If this data is used for publication, the following ackowlegment should be included: These data were produced by the Barcelona Expert Centre (http://bec.icm.csic.es/). The Barcelona Expert Center is a joint initiative of the Spanish Research Council (CSIC) and Technical (University of Catalonia (UPC), mainly founded by the Spanish National Program on Space.";
    String creator_mail "smos-bec@icm.csic.es";
    String creator_name "BEC, ICM-CSIC, Barcelona, Spain";
    String creator_type "institution";
    String creator_url "http://bec.icm.csic.es";
    String date_created "2022-02-26T18:34:52Z";
    String description "BEC L4 product resulting from singularity analysis BEC binned L3 product and sea surface temperature (SST) provided daily by Operational Sea Surface Temperature and Sea Ice Analysis (OSTIA) system. Visit http://ghrsst-pp.metoffice.com/pages/latest_analysis/ostia.html for additional information about OSTIA system";
    Float64 Easternmost_Easting 179.75;
    String funding "The development was also supported by the Ministry of Economy and Competitiviness, Spain, through the National R+D Plan under L-Band Project ESP2017-89463-C3-1-R and previous grants and by the European Space Agency by means of the contract CCI+ Salinity.";
    Float64 geospatial_lat_max 89.75;
    Float64 geospatial_lat_min -90.0;
    Float64 geospatial_lat_resolution 0.25;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.75;
    Float64 geospatial_lon_min -180.0;
    Float64 geospatial_lon_resolution 0.25;
    String geospatial_lon_units "degrees_east";
    String history 
"Fri Jun 19 00:48:00 2020: ncap2 -O -s time[time]=1546214400; tmp1.nc tmp2.nc
2024-12-21T13:15:45Z (local files)
2024-12-21T13:15:45Z http://erddap.emodnet-physics.eu/erddap/griddap/SMOS_SSS_L4_V2020_REDUCED.das";
    String infoUrl "http://bec.icm.csic.es";
    String institution "BEC, ICM-CSIC, Barcelona, Spain";
    String keywords "analysis, barcelona, bec, csic, data, density, earth, Earth Science > Oceans > Salinity/Density > Salinity, file, global, ice, icm, icm-csic, level, ocean, oceans, operational, ostia, practical, salinity, science, sea, sea_water_practical_salinity, seawater, smos, spain, sss, sst, surface, temperature, time, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "This product is distributed under Creative Commons Attribution license (CC BY 4.0).You are free to share and adapt this product under the following terms:You must give appropriate credit (see copyright), provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.";
    String license_url "https://creativecommons.org/licenses/by/4.0/";
    String NCO "netCDF Operators version 4.7.5 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)";
    Int32 nco_openmp_thread_number 1;
    Float64 Northernmost_Northing 89.75;
    String platform "PROTEUS";
    String product_version "2.0";
    String project "This product has been developed as part of the Copernicus Marine Environment Monitoring Service (CMEMS) Land-Marine Boundary Development and Analysis (Lambda) project.";
    String references "SSS have been retrieved following the algorithm described in Olmedo, E. et al., De-biased non-Bayesian Retrieval: a novel approach to SMOS Sea Surface Salinity, Remote Sensing of Environment 193 (2017) 103–126, Olmedo, E. et al.,CHARACTERIZATION AND CORRECTION OF THE LATITUDINAL AND SEASONAL BIAS IN BEC SMOS SEA SURFACE SALINITY MAPS, 2019, Proceedings of IGARSS 2019 (Paper number WE4.R12.4). The multifractal fusion method is described in Olmedo, E. et al., Improving time and space resolution of SMOS salinitymaps using multifractal fusion, Remote Sensing of Environment 180 (2016) 246–263. Specific publication describing the entire methodology and the performance of the product has been submitted in Earth System Science Data journal, Olmedo, E. et al., Nine years of SMOS Sea Surface Salinity global maps at the Barcelona Expert Center";
    String sensor "SMOS/MIRAS";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -90.0;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary 
"This product integrates Sea Surface Salinity measurements provided by the Soil Moisture and Ocean Salinity (SMOS) European satellite mission.
This product provides daily integrated satellite Sea Surface Salinity (SSS) measurements at global scale. The SMOS SSS maps are merged with daily Sea Surface Temperature maps in order to increase the spatial resolution of the original Level 3 SSS maps. The product has a spatial resolution of 0.05ºx0.05º and the temporal coverage is from 2011 til May 2021.";
    String time_coverage_end "2021-05-24T00:00:00Z";
    String time_coverage_start "2011-01-25T00:00:00Z";
    String title "SMOS BEC global SSS product v2 L4 un V2020 - REDUCED";
    String url "http://bec.icm.csic.es";
    Float64 Westernmost_Easting -180.0;
    String wms_getcapabilities "https://erddap.emodnet-physics.eu/ncWMS2/wms?SERVICE=WMS&REQUEST=GetCapabilities&VERSION=1.3.0&DATASET=SMOS_SSS_L4";
  }
}

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.