PACE OCI Level-2 Regional Photosynthetically Available Radiation (PAR) Data, version 3.2

These products quantify the daily or instantaneous amount of usable light energy, expressed in moles of photons m⁻² (commonly noted as “Einstein m⁻²”), and are widely used to estimate marine primary production, interpret phytoplankton bloom dynamics, provide context for optical and biogeochemical measurements,and support ecosystem models and education on light–biology interactions.

Geophysical variables in this suite include: - par — Daily photosynthetically available radiation (mol photons m⁻² d⁻¹) - l2_flags — Level-2 processing flags (bitmask; see per-variable attributes for flag_masks and flag_meanings) - ipar — Instantaneous photosynthetically available radiation (mol photons m⁻² s⁻¹)