ESA Ocean Colour CCI v6.0 — merged multi-sensor chlorophyll-a

ESA Climate Change Initiative / Plymouth Marine Laboratory

Specification

Code: AL01
Reliability: A+ Gold
Variables delivered: Chlorophyll-a, Rrs (incl. 412 & 555 nm for SWM), Kd490, IOPs, PFT
Resolution: 4 km (1 km regional available)
Cadence: Daily / 5-day / 8-day / MONTHLY
Coverage: 1997-09 → 2024/25 (rolling)
Cost: FREE
Login required: No (ERDDAP) / registration (CEDA)
Latency: ~1 month reprocessed
CSV direct?: YES — ERDDAP .csv, no login
Sensor: ESA Ocean Colour CCI v6 — 4000 m, 30 day revisit

Chakaria HDSS YES Rural COASTAL

ESSENTIAL — this is THE chlorophyll record for Chakaria's coastal waters

Matlab HDSS PARTIAL Rural riverine

Regional forcing only — 4 km cannot resolve the Meghna

Dhaka City NOT APPLICABLE Urban inland

NOT APPLICABLE — 4 km, 300 km inland

Route: ERDDAP (CSV) · THREDDS/OPeNDAP · CEDA · CMEMS
Endpoint / asset ID: oceanwatch.pifsc.noaa.gov/erddap → esa-cci-chla-monthly-v6-0 | comet.nefsc.noaa.gov/erddap → occci_V6_monthly_4km | www.oceancolour.org/thredds
Pipeline step: 2 Download
Documentation: https://climate.esa.int/en/projects/ocean-colour/

cd 01_Scripts
python 07_algae_api_download.py --sources erddap

VALIDATION STATUS

Extensively validated · bias-corrected across sensors · the reference product for climate work

KNOWN LIMITATION

4 km is far too coarse for any inland water body. Case-2 (turbid) bias remains inside the estuary.