Data · dataset · 2026
POLY4 Chlorophyll-a OC-CCI Data in the Northwest Atlantic, 1997-Present
Listed in CIOOS Atlantic Data Catalogue
Chlorophyll-a concentration (Chl-a) is used as a proxy for phytoplankton biomass to track blooms and monitor the state of the ecosystem.
Description
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.
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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 (github.com/BIO-RSG/oceancolouR).
Links
Get the data
- cioosatlantic.ca /erddap/griddap/bio_remote_sensing_occci_poly4.html ↗
POLY4 Chlorophyll-a OC-CCI Data in the Northwest Atlantic, 1997-Present
download · from catalogue cioosatlantic ca
Where it is published
- CIOOS Atlantic Data Catalogue dataset page catalogue.cioosatlantic.ca/dataset/ca-cioos_66456d60-9ab4-4190-a345-a0066a85b576 ↗
landing page · from catalogue cioosatlantic ca
Catalogue records · 1
- CKAN API catalogue.cioosatlantic.ca/api/3/action/package_show?id=09dc1abe-dc9e-4e0b-bb3f-68d38c9e6… ↗
metadata API · from catalogue cioosatlantic ca
Topics
- Stated by source
- Department of Fisheries and Oceans · Fisheries and Oceans Canada
- Inferred from text
- Image 65% · Satellite remote sensing 65%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| CIOOS Atlantic Data Catalogue | 09dc1abe-dc9e-4e0b-bb3f-68d38c9e63ed | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[modality].local:modality:image | enrichment · catalogue cioosatlantic ca | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[modality].local:modality:remote-sensing | enrichment · catalogue cioosatlantic ca | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[topic].ckan_group:catalogue_cioosatlantic_ca:resorg_department-of-fisheries-and-oceans | source · catalogue cioosatlantic ca | connector:catalogue_cioosatlantic_ca@1.0.0 | |
| concepts[topic].ckan_group:catalogue_cioosatlantic_ca:resorg_fisheries-and-oceans-canada | source · catalogue cioosatlantic ca | connector:catalogue_cioosatlantic_ca@1.0.0 | |
| created_date | source · catalogue cioosatlantic ca | connector:catalogue_cioosatlantic_ca@1.0.0 | |
| description | source · catalogue cioosatlantic ca | connector:catalogue_cioosatlantic_ca@1.0.0 | /notes |
| license_text | source · catalogue cioosatlantic ca | connector:catalogue_cioosatlantic_ca@1.0.0 | |
| publication_date | source · catalogue cioosatlantic ca | connector:catalogue_cioosatlantic_ca@1.0.0 | |
| title | source · catalogue cioosatlantic ca | connector:catalogue_cioosatlantic_ca@1.0.0 | /title |
| updated_date | source · catalogue cioosatlantic ca | connector:catalogue_cioosatlantic_ca@1.0.0 |