PACE OCI: Regional Ocean Color Inherent Optical Properties Data

Satellite-derived per-pixel inherent optical properties (IOPs) of seawater, retrieved from spectral remote sensing reflectance using the Generalized Inherent Optical Properties (GIOP) model framework. The data suite includes geophysical variables such as absorption and backscattering coefficients, supporting water-type classification and biogeochemical studies. The dataset is provided by the OB_CLOUD organization via the NASA Earthdata platform.

Use Cases

• Water-type classification based on inherent optical properties like absorption and backscattering coefficients.
• Water-clarity assessment using the diffuse attenuation coefficient (Kd) for downwelling irradiance.
• Biogeochemical studies leveraging phytoplankton absorption (aph) and CDOM/detritus absorption (adg_442) coefficients.
• Forward/adjoint radiative-transfer applications utilizing retrieved total absorption (a) and backscattering (bb) coefficients.
• Cross-sensor comparison and validation enabled by IOP products, which are described as more robust than apparent optical property products.

Strengths

• Provides a suite of 11 specific geophysical variables, including coefficients for absorption, backscattering, and their uncertainties.
• Derived using a defined model framework (Generalized Inherent Optical Properties - GIOP) applied to spectral remote sensing reflectance.
• Supports multiple concrete applications mentioned in the description: water-type classification, water-clarity assessment, biogeochemical studies, and radiative-transfer modeling.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

NASA Earthdata (nasa_earthdata), organization OB_CLOUD

Collection Method

Satellite remote sensing data from the PACE OCI instrument, processed through the GIOP model framework.

Geography

Regional coverage (implied by 'Regional' in title), likely oceanic areas observed by the PACE satellite.