Easier access to scientific data
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ERDDAP
Easier access to scientific data |
Brought to you by NOAA NMFS SWFSC ERD |
| Dataset Title: | Northwest Atlantic per-pixel spring bloom metrics derived from OC-CCI POLY4 satellite Chlorophyll-a, 1998-present 
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| Institution: | dfo_bio (Dataset ID: bio_remote_sensing_occci_nwa_poly4_spring_bloom) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Files
| Make a graph
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Attributes {
time {
String _CoordinateAxisType "Time";
Float64 actual_range 8.836128e+8, 1.7040672e+9;
String axis "T";
String calendar "standard";
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 39.020833333333336, 65.97916666666667;
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 -75.97916666666667, -42.020833333333336;
String axis "X";
String ioos_category "Location";
String long_name "Longitude";
String standard_name "longitude";
String units "degrees_east";
}
t_start {
Float32 _FillValue NaN;
Float64 colorBarMaximum 200.0;
Float64 colorBarMinimum 0.0;
String ioos_category "Ocean Color";
String long_name "Day of year of the start of the spring phytoplankton bloom";
Float32 valid_max 176.0;
Float32 valid_min 1.0;
}
t_duration {
Float32 _FillValue NaN;
Float64 colorBarMaximum 250.0;
Float64 colorBarMinimum 0.0;
String ioos_category "Ocean Color";
String long_name "Duration of the spring phytoplankton bloom";
String units "days";
Float32 valid_max 220.0;
Float32 valid_min 1.0;
}
amplitude_real {
Float32 _FillValue NaN;
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String ioos_category "Ocean Color";
String long_name "Maximum concentration during the spring phytoplankton bloom period";
String units "mg/m3";
Float32 valid_max 100.0;
Float32 valid_min 0.0;
}
magnitude_real {
Float32 _FillValue NaN;
Float64 colorBarMaximum 30.0;
Float64 colorBarMinimum 0.03;
String colorBarScale "Log";
String ioos_category "Ocean Color";
String long_name "Total chlorophyll-a produced during the spring phytoplankton bloom period";
String units "days*mg/m3";
Float32 valid_max 22000.0;
Float32 valid_min 0.0;
}
annual_mean {
Float32 _FillValue NaN;
Float64 colorBarMaximum 30.0;
Float64 colorBarMinimum 0.03;
String colorBarScale "Log";
String ioos_category "Ocean Color";
String long_name "Average chlorophyll-a over the year";
String standard_name "mass_concentration_of_chlorophyll_a_in_sea_water";
String units "mg/m3";
Float32 valid_max 100.0;
Float32 valid_min 0.0;
}
NRMSE_bloom {
Float32 _FillValue NaN;
Float64 colorBarMaximum 0.1;
Float64 colorBarMinimum 0.0;
String ioos_category "Ocean Color";
String long_name "Root mean square error between the fitted Gaussian and real chl-a values during the bloom period, normalized to amplitude_real";
String units "mg/m3";
Float32 valid_max 1.0;
Float32 valid_min 0.0;
}
percent_dineof {
Float32 _FillValue NaN;
Float64 colorBarMaximum 100.0;
Float64 colorBarMinimum 0.0;
String ioos_category "Ocean Color";
String long_name "Percentage of days with pixel values estimated using DINEOF";
Float32 valid_max 100.0;
Float32 valid_min 0.0;
}
NC_GLOBAL {
String cdm_data_type "Grid";
String Conventions "CF-1.10, COARDS, ACDD-1.3";
String creator_email "Stephanie.Clay@dfo-mpo.gc.ca";
String creator_group "SOPhyE (Satellite Ocean colour and Phytoplankton Ecology group), Ocean Monitoring and Modelling Section";
String creator_name "Stephanie Clay";
String creator_type "person";
String creator_url "https://bio-rsg.github.io/";
String date_created "2025-08-31T11:52:23Z";
Float64 Easternmost_Easting -42.020833333333336;
String geographic_crs_epsg_code "EPSG:4326";
Float64 geospatial_lat_max 65.97916666666667;
Float64 geospatial_lat_min 39.020833333333336;
Float64 geospatial_lat_resolution 0.04166666666666667;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -42.020833333333336;
Float64 geospatial_lon_min -75.97916666666667;
Float64 geospatial_lon_resolution 0.04166666666666667;
String geospatial_lon_units "degrees_east";
String history
"Created with map_and_write_to_netcdf.R. Input data were 4km-resolution spring bloom metrics and annual average chlorophyll-a (chl-a) concentration per bin. Bloom metrics for each bin and year were derived from a shifted gaussian curve fitted to the time series of daily logged chl-a data within that bin. Chl-a data were taken from the POLY4 chl-a dataset which was generated using remote sensing reflectances (Rrs) from the OC-CCI multisensor product (www.oceancolour.org) and regionally-tuned coefficients, and subsequently gap-filled using DINEOF (https://github.com/aida-alvera/DINEOF).
2025-10-24T05:03:18Z (local files)
2025-10-24T05:03:18Z https://cioosatlantic.ca/erddap/griddap/bio_remote_sensing_occci_nwa_poly4_spring_bloom.das";
String infoUrl "https://bio-rsg.github.io/";
String institution "dfo_bio";
String keywords "agencies, agencies-non-us, amplitude, amplitude_real, annual_mean, average, based, between, bio, bloom, ca/dfo/bio, canada, chemistry, chl, chl-a, chlorophyll, chlorophyll-a, color, concentration, data, day, days, department, dfo, dineof, duration, during, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Chemistry > Pigments > Chlorophyll, Earth Science > Oceans > Ocean Optics > Chlorophyll > Chlorophyll Concentration, error, estimated, fisheries, fitted, gaussian, government, latitude, longitude, magnitude_real, mass, mass_concentration_of_chlorophyll_a_in_sea_water, maximum, mean, metrics, non, normalized, NRMSE_bloom, nwa, observation, occci, ocean, ocean color, oceans, optics, over, percent_dineof, percentage, period, phytoplankton, pigments, pixel, platforms, Platforms > Space-based Platforms > Earth Observation Satellites >, produced, providers, Providers > GOVERNMENT AGENCIES-NON-US > CANADA > CA/DFO/BIO, real, root, satellites, science, sea, seawater, space, space-based, spring, square, start, t_duration, t_start, time, total, using, values, water, with, year";
String keywords_vocabulary "GCMD Science Keywords";
String license "https://creativecommons.org/licenses/by/4.0/";
String map_projection "Equidistant Cylindrical (Plate Carrée)";
String mission "Multiple missions";
Float64 Northernmost_Northing 65.97916666666667;
String platform "Multiple platforms";
String POLY4_coefficients "0.59779,-3.15824,-0.80348,0.93129,0.78322";
String processing_level "L4 Mapped";
String product_name "gaussian_fit_metrics_2010.nc";
String projected_crs_epsg_code "EPSG:4087";
String references "doi:10.3390/s19194285; https://catalogue.ceda.ac.uk/uuid/690fdf8f229c4d04a2aa68de67beb733; doi:10.3390/rs11222609; Layton, C., Devred, E., DeTracey B.. 2022. A comparison of phytoplankton spring bloom fitting methods using MODIS satellite-derived chlorophyll-a concentration for the Maritimes region. Can. Tech. Rep. Hydrogr. Ocean Sci. 340: vii + 22 p.; Stephanie Clay, Chantelle Layton, & Emmanuel Devred. (2021). BIO-RSG/PhytoFit: First release (v1.0.0). Zenodo. https://doi.org/10.5281/zenodo.4770754; doi:10.1016/j.ocemod.2004.08.001";
String region "Northwest Atlantic";
String reprocessing "v6.0";
String sensor "Multiple sensors";
String source "Spring bloom metrics and annual average chlorophyll-a (chl-a) derived from DINEOF-filled POLY4 chl-a. POLY4 chl-a were created using remote sensing reflectance (Rrs) data from the OC-CCI multisensor product, which were generated by the Plymouth Marine Laboratory (PML) as part of the European Space Agency (ESA) climate change initiative (www.oceancolour.org).";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 39.020833333333336;
String spatial_resolution "4.64km at equator";
String standard_name_vocabulary "CF Standard Name Table v79";
String summary "NWA OCCCI spring bloom metrics 2024";
String temporal_range "year";
Int32 time 2010;
String time_coverage_end "2024-01-01T00:00:00Z";
String time_coverage_start "1998-01-01T00:00:00Z";
String title "Northwest Atlantic per-pixel spring bloom metrics derived from OC-CCI POLY4 satellite Chlorophyll-a, 1998-present";
String tools "https://github.com/BIO-RSG/oceancolouR";
Float64 Westernmost_Easting -75.97916666666667;
}
}
Data Access Protocol (DAP) and its
projection constraints.
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.
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.