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Dataset Title:	Arctic Ocean, DIVAnd 4D 6-year seasonal analysis of Water body silicate 1970/ 2024 v2025 [observations]
Institution:	Institute of Marine Research (Dataset ID: oceanbrowser_opendap_0e15_e5e4_4e07)
Information:	Summary \| License \| Metadata \| Background \| Data Access Form

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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  observations {
    Int32 actual_range 0, 311985;
    String long_name "Observations";
    String units "count";
  }
  obsdepth {
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String long_name "depth below sea level";
    String positive "down";
    String standard_name "depth";
    String units "meters";
  }
  obslat {
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String long_name "latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  obslon {
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String long_name "longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  obstime {
    String ioos_category "Time";
    String long_name "Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  NC_GLOBAL {
    String abstract "Moving 6-year analysis of silicate in the Arctic Ocean, for each season in the period 1970-2024. Every year of the time dimension corresponds to the 6-year centered average for each season. Winter: December-February, Spring: March-May, Summer: June-August, Autumn: September-November. Depth range (IODE standard depths): 0, 5, 10, 20, 30, 40, 50, 75, 100, 125, 150, 200, 250, 300, 400, ..., 1500, 1750, 2000, 2500m. Units: umol/l. Description of DIVA analysis: The computation was done with DIVAnd (Data-Interpolating Variational Analysis in n dimensions), version 2.7.13, using GEBCO 30sec topography for the spatial connectivity of water masses. The horizontal resolution of the produced DIVAnd maps grids is 0.125 degrees.  Signal-to-noise ratio was fixed to 3.0, horizontal correlation length varying from 45 km near the coast to 150 km, and vertical correlation length varying between 25 and 1000 m. Logarithmic transformation is applied to the data prior to the analysis. Background field: analysis with signal-to-noise ratio = 20, horizontal correlation length 50-200 km, and vertical correlation length 25-1000 m.";
    String Acknowledgements "Aggregated data products are generated by EMODnet Chemistry under the support of DG MARE Call for Tenders EASME/2020/OP/0006 (EASME/EMFF/2020/3.1.11/Lot 5/SI2.846161)";
    String area_keywords "Arctic Ocean";
    String area_keywords_urn "SDN:C19::9";
    String Author_e_mail "Ann.Kristin.Ostrem@imr.no, Helge.Sagen@imr.no";
    String bathymetry_source "The GEBCO 30sec Digital Atlas published by the British Oceanographic Data Centre on behalf of IOC and IHO, 2003";
    String cdm_data_type "Grid";
    String Conventions "CF-1.60, COARDS, ACDD-1.3";
    String creator_name "Institute of Marine Research";
    String creator_url "http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2025/By_sea_regions-water_body/Arctic_Ocean/Water_body_silicate.4Danl.nc.html";
    String date "2025-10-06T18:04:18";
    String DIVAnd_code_doi "https://doi.org/10.5281/zenodo.7016823";
    String DIVAnd_references "Barth, A.; Beckers, J.-M.; Troupin, C.; Alvera-AzcÃ¡rate, A. & Vandenbulcke, L. divand-1.0: n-dimensional variational data analysis for ocean observations. Geoscientific Model Development, 2014, 7, 225-241. DOI: :10.5194/gmd-7-225-2014";
    String DIVAnd_source "https://github.com/gher-uliege/DIVAnd.jl";
    String DIVAnd_version "2.7.13";
    String documentation "10.13120/FA5C704A-A5EA-4F60-91B5-2BF6A7ADED45";
    String doi "10.13120/f6e78f49-c9c2-45a6-8f59-35dde0a934c8";
    String file_name "Water_body_silicate.4Danl.nc";
    String history 
"Thu Nov  6 15:29:53 2025: ncks -7 -O -L 5 --baa=4 --ppc default=3 /media/ctroupin/T7 Shield/data/EMODnet-Chemistry/Eutrophication2024/Results/By_sea_regions-water_body/Arctic_Ocean/Water_body_silicate.4Danl.nc /media/ctroupin/T7 Shield/data/EMODnet-Chemistry/Eutrophication2024/Results/By_sea_regions-water_body/Arctic_Ocean/Water_body_silicate.4Danl.nc
2026-03-13T23:58:07Z http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2025/By_sea_regions-water_body/Arctic_Ocean/Water_body_silicate.4Danl.nc
2026-03-13T23:58:07Z https://erddap.emodnet.eu/griddap/oceanbrowser_opendap_0e15_e5e4_4e07.das";
    String id "DatasetScan/emodnet-projects/v2025/By_sea_regions-water_body/Arctic_Ocean/Water_body_silicate.4Danl.nc";
    String infoUrl "http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2025/By_sea_regions-water_body/Arctic_Ocean/Water_body_silicate.4Danl.nc.html";
    String institution "Institute of Marine Research";
    String institution_urn "SDN:EDMO::1351";
    String keywords "6-year, analysis, arctic, below, body, data, depth, divand, exchange, institute, international, iode, latitude, level, longitude, marine, obsdepth, observations, obslat, obslon, obstime, ocean, oceanographic, research, sea, seasonal, seawater, silicate, time, v2025, water, year";
    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 NCO "netCDF Operators version 5.2.1 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco, Citation = 10.1016/j.envsoft.2008.03.004)";
    String parameter_keyword "Water body silicate";
    String parameter_keyword_urn "SDN:P35::EPC00008";
    String product_code "Arctic-Water_body_silicate-v2025-ANA";
    String product_id "f6e78f49-c9c2-45a6-8f59-35dde0a934c8";
    String product_version "1.0";
    String project "EMODnet Chemistry";
    String search_keywords "Silicate concentration parameters in the water column";
    String search_keywords_urn "SDN:P02::SLCA";
    String source "Observational data from SeaDataNet/EMODnet Chemistry Data Network";
    String sourceUrl "http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2025/By_sea_regions-water_body/Arctic_Ocean/Water_body_silicate.4Danl.nc";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Arctic Ocean - DIVAnd 4D 6-year seasonal analysis of Water body silicate 1970/2024 v2025. Moving 6-year analysis of silicate in the Arctic Ocean, for each season in the period 1970-2024. Every year of the time dimension corresponds to the 6-year centered average for each season. Winter: December-February, Spring: March-May, Summer: June-August, Autumn: September-November. Depth range (International Oceanographic Data Exchange (IODE) standard depths): 0, 5, 10, 20, 30, 40, 50, 75, 100, 125, 150, 200, 250, 300, 400, ..., 1500, 1750, 2000, 2500m. Units: umol/l. Description of DIVA analysis: The computation was done with DIVAnd (Data-Interpolating Variational Analysis in n dimensions), version 2.7.13, using GEBCO 30sec topography for the spatial connectivity of water masses. The horizontal resolution of the produced DIVAnd maps grids is 0.125 degrees.  Signal-to-noise ratio was fixed to 3.0, horizontal correlation length varying from 45 km near the coast to 150 km, and vertical correlation length varying between 25 and 1000 m. Logarithmic transformation is applied to the data prior to the analysis. Background field: analysis with signal-to-noise ratio = 20, horizontal correlation length 50-200 km, and vertical correlation length 25-1000 m.";
    String title "Arctic Ocean, DIVAnd 4D 6-year seasonal analysis of Water body silicate 1970/2024 v2025 [observations]";
  }
}

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.

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