Data Access Form

Dataset Title:	Black Sea, DIVAnd 4D 6-year seasonal analysis of Water body phosphate 1980/ 2021 v2023 [time][lat][lon], 0.05°, 1982-2018
Institution:	National Institute for Marine Research and Development "Grigore Antipa" (Dataset ID: V2023_chemistry_f367_7683_fbd6)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

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Dimensions	Size	Spacing
time (UTC)	148	91 days 7h 20m 49s (uneven)

latitude (degrees_north)	161	0.05 (even)

longitude (degrees_east)	311	0.05 (even)

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

Water_body_phosphate_deepest (umol/l)

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 {
    String _CoordinateAxisType "Time";
    Float64 actual_range 3.799872e+8, 1.539648e+9;
    String axis "T";
    String calendar "standard";
    String climatology "climatology_bounds";
    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";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 40.0, 48.0;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range 26.5, 42.0;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Water_body_phosphate_deepest {
    Float32 _FillValue 9.96921e+36;
    Float64 colorBarMaximum 4.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "Deepest values of Water body phosphate";
    Float32 missing_value 9.96921e+36;
    String standard_name "mole_concentration_of_phosphate_in_sea_water";
    String units "umol/l";
  }
  NC_GLOBAL {
    String abstract 
"Moving 6-year analysis of Water body phosphate in Black Sea for each season: winter (December-February), spring (March-May), summer (June-August), autumn (September-November). Every year of the time dimension corresponds to the 6-year centered average of the season. 6-years periods span from 1980-1985 until 2016-2021.
Data Sources: observational data from SeaDataNet/EMODNet Chemistry Data Network.
Units: umol/l.
DIVA analysis: The computation was done with the DIVAnd (Data-Interpolating Variational Analysis in n dimensions), version 2.7.9, using GEBCO 30sec topography for the spatial connectivity of water masses.
The horizontal resolution of the produced DIVAnd maps grids is 0.05 degrees.
The vertical resolution is 15 depth levels: 0, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 125, 150, 200m
The horizontal correlation length: 80km.
The vertical correlation length (in meters):  twice the vertical resolution (10, 10, 20, 20, 20, 20, 20, 20, 20, 20, 20, 50, 50, 100, 100).
The error variance (epsilon2): 1 
An anamorphosis transformation was applied to the data: threshold value=200.
Background field: not used.
Quality control of the observations was applied using the interpolated field: QCMETHOD=3 and visual inspection (Observations with residuals outside the minimum and maximum values of the 99% quantile were discarded from the analysis after thoroughly visual inspection)";
    String acknowledgement "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 "Black Sea";
    String area_keywords_urn "SDN:C19::3_3";
    String Author_e_mail "Gheorghe Sarbu <ghesarbu@gmail.com>, Luminita Buga <lbuga@web.de>";
    String bathymetry_source "The GEBCO Digital Atlas published by the British Oceanographic Data Centre on behalf of IOC and IHO, 2003. Resolution used for the analysis: 30 arc-second";
    String cdm_data_type "Grid";
    String citation "Usage is subject to mandatory citation: \"This resource was generated in the framework of EMODnet Chemistry, under the support of DG MARE Call for Tender EASME/EMFF/2020/3.1.11/European Marine Observation and Data Network (EMODnet) - Lot 5 - Chemistry\"";
    String comment "Every year of the time dimension corresponds to a 6-year centred average for the seasons: winter (Dec-Feb), spring (Mar-May), summer (Jun-Aug), autumn (Sep-Nov). Horizontal resolution 0.05 degree by 0.05 degree";
    String Conventions "CF-1.60, COARDS, ACDD-1.3";
    String creator_name "National Institute for Marine Research and Development \"Grigore Antipa\"";
    String creator_url "http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/By_sea_regions/Black_Sea/Water_body_phosphate.4Danl.nc.html";
    String date "2023-04-13T11:44:07";
    String DIVA_code_doi "10.5281/zenodo.7016823";
    String DIVA_references "Barth, A., Beckers, J.-M., Troupin, C., Alvera-Azcarate, A., and Vandenbulcke, L. (2014): divand-1.0: n-dimensional variational data analysis for ocean observations, Geosci. Model Dev., 7, 225-241, doi: 10.5194/gmd-7-225-2014";
    String DIVAnd_source "https://github.com/gher-uliege/DIVAnd.jl";
    String DIVAnd_version "v2.7.9";
    String doi "https://doi.org/10.13120/6c979fc6-fa21-4813-a2cb-f44765937360";
    Float64 Easternmost_Easting 42.0;
    String file_name "By_sea_regions/Black_Sea/Water_body_phosphate.4Danl.nc";
    Float64 geospatial_lat_max 48.0;
    Float64 geospatial_lat_min 40.0;
    Float64 geospatial_lat_resolution 0.05;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 42.0;
    Float64 geospatial_lon_min 26.5;
    Float64 geospatial_lon_resolution 0.05;
    String geospatial_lon_units "degrees_east";
    String history 
"Fri Sep  1 10:00:52 2023: ncks -O Water_body_phosphate.4Danl.nc Water_body_phosphate.4Danl.nc
2024-12-22T03:13:44Z http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/By_sea_regions/Black_Sea/Water_body_phosphate.4Danl.nc
2024-12-22T03:13:44Z https://erddap.emodnet.eu/erddap/griddap/V2023_chemistry_f367_7683_fbd6.das";
    String id "DatasetScan/emodnet-projects/v2023/By_sea_regions/Black_Sea/Water_body_phosphate.4Danl.nc";
    String infoUrl "http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/By_sea_regions/Black_Sea/Water_body_phosphate.4Danl.nc.html";
    String institution "National Institute for Marine Research and Development \"Grigore Antipa\"";
    String institution_urn "SDN:EDMO::697";
    String keywords "6-year, analysis, antipa, black, body, chemistry, concentration, control, data, deepest, development, dissolved, dissolved nutrients, divand, earth, Earth Science > Oceans > Ocean Chemistry > Phosphate, error, grigore, institute, latitude, longitude, marine, masked, mole, mole_concentration_of_phosphate_in_sea_water, national, nutrients, ocean, oceans, phosphate, po4, quality, relative, research, science, sea, seasonal, seawater, statistics, threshold, time, using, v2023, values, water, water_body_phosphate, Water_body_phosphate_deepest, Water_body_phosphate_deepest_L1, Water_body_phosphate_deepest_L2, year";
    String keywords_vocabulary "GCMD Science Keywords";
    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 4.9.9 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)";
    Float64 Northernmost_Northing 48.0;
    String parameter_keyword "Water body phosphate";
    String parameter_keyword_urn "SDN:P35::EPC00007";
    String product_code "Black_Sea-Water_body_phosphate-v2023-ANA";
    String product_id "bae61190-470f-436b-af3f-26c8ceca450a";
    String product_version "2.0";
    String project "EMODnet-Chemistry";
    String search_keywords "Phosphate concentration parameters in the water column";
    String search_keywords_urn "SDN:P02::PHOS";
    String source "Observational data from SeaDataNet/EMODNet Chemistry Data Network";
    String sourceUrl "http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/By_sea_regions/Black_Sea/Water_body_phosphate.4Danl.nc";
    Float64 Southernmost_Northing 40.0;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary 
"Black Sea - DIVAnd 4D 6-year seasonal analysis of Water body phosphate 1980/2021 v2023. Moving 6-year analysis of Water body phosphate in Black Sea for each season: winter (December-February), spring (March-May), summer (June-August), autumn (September-November). Every year of the time dimension corresponds to the 6-year centered average of the season. 6-years periods span from 1980-1985 until 2016-2021.
Data Sources: observational data from SeaDataNet/EMODNet Chemistry Data Network.
Units: umol/l.
DIVA analysis: The computation was done with the DIVAnd (Data-Interpolating Variational Analysis in n dimensions), version 2.7.9, using GEBCO 30sec topography for the spatial connectivity of water masses.
The horizontal resolution of the produced DIVAnd maps grids is 0.05 degrees.
The vertical resolution is 15 depth levels: 0, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 125, 150, 200m
The horizontal correlation length: 80km.
The vertical correlation length (in meters):  twice the vertical resolution (10, 10, 20, 20, 20, 20, 20, 20, 20, 20, 20, 50, 50, 100, 100).
The error variance (epsilon2): 1 
An anamorphosis transformation was applied to the data: threshold value=200.
Background field: not used.
Quality control of the observations was applied using the interpolated field: QCMETHOD=3 and visual inspection (Observations with residuals outside the minimum and maximum values of the 99% quantile were discarded from the analysis after thoroughly visual inspection)";
    String time_coverage_end "2018-10-16T00:00:00Z";
    String time_coverage_start "1982-01-16T00:00:00Z";
    String title "Black Sea, DIVAnd 4D 6-year seasonal analysis of Water body phosphate 1980/2021 v2023 [time][lat][lon], 0.05°, 1982-2018";
    String WEB_visualisation "https://emodnet.ec.europa.eu/geoviewer/";
    Float64 Westernmost_Easting 26.5;
  }
}

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.