Datasets › AL13
1. Ocean colour (single sensor)
MODIS-Terra Level-3 SMI
NASA OB.DAAC
Specification
- Code
AL13- Reliability
- B Usable
- Variables delivered
- Chlorophyll-a, Rrs, SST
- Resolution
4.6 km- Cadence
- Daily / 8-day / monthly
- Coverage
- 2000-02-24 → present
- Cost
- FREE
- Login required
- No (GEE)
- Latency
- ~1-2 days
- CSV direct?
- Via GEE / ERDDAP
- Sensor
- MODIS Terra — 250 m, 1 day revisit
Applicability by site
YES — and it is the ONLY 4 km sensor covering Feb 2000 to mid-2002
Regional forcing only
NOT APPLICABLE
Access
- Route
- GEE · OB.DAAC API
- Endpoint / asset ID
NASA/OCEANDATA/MODIS-Terra/L3SMI- Pipeline step
- 3 Extract
- Documentation
- https://developers.google.com/earth-engine/datasets/catalog/NASA_OCEANDATA_MODIS-Terra_L3SMI
Command
cd 01_Scripts
python 10_algae_daily_3sites.py --sensors oceanWhat to watch for
VALIDATION STATUS
Validated but with known drift
KNOWN LIMITATION
Blue-band sensor degradation after ~2010. Cross-calibrate against Aqua or just use OC-CCI, which handles this.