Ocean color chlorophyll-a unit
Posted: Fri Jun 09, 2023 5:18 am America/New_York
Satellite sensors (e.g. MODIS AQUA) observe the surface/optical depth. How does it provide chlorophyll-a concentration data in cubic meter (m³)?
The measurement of chlorophyll concentration is indeed a volumetric measurement, thus the units of milligrams per cubic meter. The algorithm employed can relate the observed surface reflectance spectrum to a chlorophyll concentration as it was developed using coincident in situ measurements of remote sensing reflectance and chlorophyll concentration. It is thus an empirical algorithm.
Regards,
Sean