CMEMS Global Ocean Biogeochemistry Reanalysis

CMEMS / Mercator Ocean

Specification

Code: AL12
Reliability: A Reliable
Variables delivered: Chlorophyll, phytoplankton carbon, nitrate, phosphate, silicate, primary production, O2, pH
Resolution: 0.25 deg (~28 km)
Cadence: DAILY
Coverage: 1993 → present (rolling)
Cost: FREE
Login required: CMEMS registration
Latency: ~6 months
CSV direct?: Via toolbox → .to_csv()

Chakaria HDSS PARTIAL Rural COASTAL

MEDIUM — gives NUTRIENTS, which no optical sensor can measure, and is completely gap-free

Matlab HDSS NOT APPLICABLE Rural riverine

LOW — 28 km

Dhaka City NOT APPLICABLE Urban inland

NOT APPLICABLE

Route: copernicusmarine toolbox
Endpoint / asset ID: GLOBAL_MULTIYEAR_BGC_001_029
Pipeline step: 2 Download
Documentation: https://data.marine.copernicus.eu/product/GLOBAL_MULTIYEAR_BGC_001_029/description

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

VALIDATION STATUS

Assimilated model, validated against in-situ · skill lower in coastal zones

KNOWN LIMITATION

MODEL OUTPUT, NOT OBSERVATION. 0.25 deg has essentially no coastal skill. Use for basin-scale nutrient context only.