VGPM-NPP-SeaWiFS: Standard VGPM is a marine primary productivity model based on chlorophyll concentration, which is a function of chlorophyll concentration, photosynthetically active radiation, photosynthetic efficiency, daylight hours, and euphotic zone depth. The photosynthetic efficiency of phytoplankton is a function of temperature. This NPP dataset is calculated based on SeaWiFS observations, with units in mg C m^-2 d^-1.
VGPM-NPP-MODIS: Similar to VGPM-NPP-SeaWiFS but calculated based on MODIS observations.
VGPM-NPP-VIIRS: Similar to VGPM-NPP-SeaWiFS but calculated based on VIIRS observations.
Eppley-VGPM-SeaWiFS: The Eppley-VGPM algorithm is also based on chlorophyll concentration and is a modification of the standard VGPM algorithm. The basic form of both algorithms is the same, but Eppley-VGPM adjusts the relationship between maximum carbon fixation rate within the water column and temperature. This dataset is based on SeaWiFS observations, with units in mg C m^-2 d^-1.
Eppley-VGPM-MODIS: Similar to Eppley-VGPM-SeaWiFS but calculated based on MODIS observations.
Eppley-VGPM-VIIRS: Similar to Eppley-VGPM-SeaWiFS but calculated based on VIIRS observations.
CbPM-SeaWiFS: Due to the decoupling of chlorophyll concentration and biomass caused by phytoplankton acclimation to light and physiological adaptations to nutrient concentrations, estimating primary productivity based on chlorophyll concentration poses challenges. CbPM proposes a method based on phytoplankton carbon content to estimate marine primary productivity, where NPP is a function of phytoplankton carbon, growth rate, and euphotic zone depth. This dataset is calculated based on SeaWiFS observations, with units in mg C m^-2 d^-1.
CbPM-MODIS: Similar to CbPM-SeaWiFS but calculated based on MODIS observations.
CbPM-VIIRS: Similar to CbPM-SeaWiFS but calculated based on VIIRS observations.