Un accès facilité aux données scientifiques
Présenté par NOAA NMFS SWFSC ERD
|
ERDDAP
Un accès facilité aux données scientifiques |
Présenté par NOAA NMFS SWFSC ERD |
| Titre de l'ensemble de données: | POLY4 Chlorophyll-a OC-CCI Data in the Northwest Atlantic, 1997-Present
|
| Institution: | dfo_bio (ID de l'ensemble de données: bio_remote_sensing_occci_poly4) |
| Information: | Résumé
| Licence
| FGDC
| ISO 19115
| Métadonnées
| Arrière-plan
| Des dossiers
| Faire un graphique
|
Attributes {
time {
String _CoordinateAxisType "Time";
Float64 actual_range 8.733312e+8, 1.7433792e+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, 81.97916666666667;
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 -94.97916666666667, -42.020833333333336;
String axis "X";
String ioos_category "Location";
String long_name "Longitude";
String standard_name "longitude";
String units "degrees_east";
}
chlor_a {
Float32 _FillValue NaN;
Float64 colorBarMaximum 30.0;
Float64 colorBarMinimum 0.03;
String colorBarScale "Log";
String ioos_category "Ocean Color";
String long_name "Chlorophyll-a Concentration (POLY4v1 model with coefficients optimized to OC-CCI multisensor product in the Northwest Atlantic)";
String standard_name "mass_concentration_of_chlorophyll_a_in_sea_water";
String units "mg m-3";
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 "2025-07-29T13:57:57Z";
Float64 Easternmost_Easting -42.020833333333336;
String geographic_crs_epsg_code "EPSG:4326";
Float64 geospatial_lat_max 81.97916666666667;
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 -94.97916666666667;
Float64 geospatial_lon_resolution 0.04166666666666667;
String geospatial_lon_units "degrees_east";
String history
"Created with make_mapped_netcdf.R. Input data are 4km-resolution level-3 binned remote sensing reflectances (Rrs) from the OC-CCI multisensor product (www.oceancolour.org) generated by the Plymouth Marine Laboratory (PML) as part of the European Space Agency (ESA) climate change initiative. Rrs are subset to the region of interest and used in conjunction with the most recent set of regionally-tuned parameters to create the level-3 binned product. The data are then mapped to a Plate Carrée projection using a nearest-neighbour method implemented in bin_to_raster() from the oceancolouR R package.
2025-08-09T11:10:30Z (local files)
2025-08-09T11:10:30Z https://cioosatlantic.ca/erddap/fr/griddap/bio_remote_sensing_occci_poly4.das";
String infoUrl "https://bio-rsg.github.io/";
String institution "dfo_bio";
String keywords "2025-03-31, agencies, agencies-non-us, atlantic, based, bio, ca/dfo/bio, canada, cci, chemistry, chl, chlor_a, chlorophyll, chlorophyll-a, coefficients, color, concentration, data, department, dfo, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Chemistry > Pigments > Chlorophyll, Earth Science > Oceans > Ocean Optics > Chlorophyll > Chlorophyll Concentration, fisheries, government, latitude, longitude, mass, mass_concentration_of_chlorophyll_a_in_sea_water, model, multisensor, non, northwest, nwa, observation, oc-cci, occci, ocean, ocean color, oceans, optics, optimized, pigments, platforms, Platforms > Space-based Platforms > Earth Observation Satellites >, poly4, poly4v1, product, providers, Providers > GOVERNMENT AGENCIES-NON-US > CANADA > CA/DFO/BIO, satellites, science, sea, seawater, space, space-based, time, water, with";
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 81.97916666666667;
String platform "Multiple platforms";
String POLY4v1_coefficients "0.59779,-3.15824,-0.80348,0.93129,0.78322";
String processing_level "L3 Mapped";
String product_name "OCCCI.20250331.L3b.DAY.CHL_POLY4.NWA.mapped.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";
String region "Northwest Atlantic";
String reprocessing "v6.0";
String sensor "Multiple sensors";
String source "POLY4 chlorophyll-a created using remote sensing reflectance (Rrs) data from the OC-CCI multisensor product 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 km at equator";
String standard_name_vocabulary "CF Standard Name Table v79";
String summary "Chlorophyll-a concentration (Chl-a) is used as a proxy for phytoplankton biomass to track blooms and monitor the state of the ecosystem. This dataset contains daily satellite Chl-a since Sep 1997. The data is at a 4.64x4.64 km spatial resolution covering an area of the Northwest Atlantic from 39-82°N, 42-95°W. Regionally-tuned coefficients for POLY4 Chl-a (Clay et al., 2019, see resources) were obtained by matching level-3 gridded 1km-resolution satellite pixels to in situ HPLC (High Performance Liquid Chromatography) Chl-a samples within the region of interest. POLY4 Chl-a was then optimized by forcing the linear regression of POLY4 against HPLC to the 1:1 line to reduce the negative bias observed in higher concentrations in the default global Chl-a models. Daily Chl-a images were generated by applying the optimized POLY4 algorithm on level-3 binned remote sensing reflectance (Rrs) data from the OC-CCI multisensor product generated by the Plymouth Marine Laboratory (PML) as part of the European Space Agency (ESA) climate change initiative. The Chl-a data were then projected onto an Equidistant Cylindrical grid (4.64x4.64 km per pixel) using a nearest neighbour method. This model and the Northwest Atlantic coefficients are available in the R package oceancolouR (https://github.com/BIO-RSG/oceancolouR).";
String temporal_range "day";
String time "2025-03-31";
String time_coverage_end "2025-03-31T00:00:00Z";
String time_coverage_start "1997-09-04T00:00:00Z";
String title "POLY4 Chlorophyll-a OC-CCI Data in the Northwest Atlantic, 1997-Present";
String tools "https://github.com/BIO-RSG/oceancolouR";
Float64 Westernmost_Easting -94.97916666666667;
}
}
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