Data group
Exposure to physical risks
Metric Type
Physical vulnerability
Methodology/ Standard / Classification/ Taxonomy / Reference
MODIS
Unit (e.g. CO2)
Daily average photosynthetically active radiation (iPAR) in Einstein m-2 s-1
Dimension (e.g. Sector, Customer)
By Country (map)
Time horizon
Backward-looking
Frequency
Latest update
Time series
1970-current
Accessibility
Public
Observation on data availability/gaps
This algorithm estimates daily average photosynthetically available radiation (PAR) at the ocean surface in Einstein m-2 d-1. PAR is defined as the quantum energy flux from the Sun in the 400-700nm range. For ocean color applications, PAR is a common input used in modeling marine primary productivity. Implementation of this algorithm is contingent on the availability of observed top-of-atmosphere radiances in the visible spectral regime that do not saturate over clouds. The algorithm is applicable to MODIS, MERIS, SeaWiFS, and VIIRS, but it can be operated on all ocean color sensors. The PAR product is included as part of the standard Level-2 OC product suite and the Level-3 PAR product suite.