Copernicus Marine GlobColour — L4 gap-free multi-sensor chlorophyll

CMEMS / ACRI-ST

Specification

Code: AL02
Reliability: A+ Gold
Variables delivered: Chlorophyll-a (gap-free interpolated), PFT, primary production
Resolution: 4 km
Cadence: DAILY (gap-free!)
Coverage: 1997-09 → present
Cost: FREE
Login required: CMEMS registration (free)
Latency: ~1 day (NRT) / ~1 month (MY)
CSV direct?: Via toolbox → xarray → .to_csv()

Chakaria HDSS YES Rural COASTAL

ESSENTIAL — daily gap-free chlorophyll for the Chakaria coastal box

Matlab HDSS PARTIAL Rural riverine

Regional forcing only

Dhaka City NOT APPLICABLE Urban inland

NOT APPLICABLE

Route: copernicusmarine Python toolbox · OPeNDAP
Endpoint / asset ID: cmems_obs-oc_glo_bgc-plankton_my_l4-gapfree-multi-4km_P1D (MY) / ..._nrt_... (NRT)
Pipeline step: 2 Download
Documentation: https://marine.copernicus.eu/

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

VALIDATION STATUS

Operational, continuously validated against in-situ

KNOWN LIMITATION

'Gap-free' means INTERPOLATED — a filled value is not an observation. Always carry the companion flag layer.