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  • PACE OCI Level-2 Regional Apparent Optical Properties Data, version 3.2

    https://cmr.earthdata.nasa.gov/search/concepts/C4124887023-OB_CLOUD.xml
    Description:

    The Apparent Optical Properties (OC_AOP) data suite provides satellite-derived measures of the interaction between solar radiation and the upper ocean. AOPs are "apparent" because they depend not only on the inherent optical properties (IOPs) of seawater and its constituents but also on the ambient light field. These variables are critical for studying light penetration, primary productivity, and biogeochemical cycling. AVW (Apparent Visible Wavelength) quantifies the spectral "center" of ocean color by summarizing the shape of the water-leaving reflectance spectrum (Rrs) across the visible range. Reported in nanometers (nm), AVW is lower for bluer, clearer (oligotrophic) waters and higher for greener/browner, more optically complex or productive waters influenced by phytoplankton, colored dissolved organic matter (CDOM), or suspended sediments. Users apply AVW for water-type classification, algorithm selection/blending (e.g., guiding chlorophyll retrievals), regional change detection, and as context alongside chlor_a, Kd_490, IOPs, and PAR. Fluorescence Line Height (FLH) quantifies the red chlorophyll-a fluorescence (~678-683 nm) emitted by phytoplankton, computed as the height of the measured water-leaving radiance above a spectrally interpolated baseline. FLH is widely used for HAB detection and tracking, identifying productive waters, and assessing phytoplankton physiology; values tend to be elevated in active blooms and can be reduced in complex waters. Aerosol Optical Thickness (AOT) represents the column-integrated aerosol loading in the atmosphere, describing the attenuation of light due to scattering and absorption by aerosols. AOT is a key parameter in atmospheric correction and is also used to study aerosol transport, air quality, and aerosol-ocean interactions. Remote Sensing Reflectance (Rrs) provides the remote sensing reflectance at wavelength λ (nm) - the ratio of water-leaving radiance to downwelling irradiance just above the surface (units sr^-1). Variables are named by their band center (e.g., Rrs_412, Rrs_443). Rrs_λ is the foundational observable used to retrieve products such as chlor_a, Kd_490, IOPs, and to support algorithm development, validation, water-quality, and ecosystem applications. Users should review per-file quality flags (e.g., land, cloud, sun glint, high aerosol) and mission documentation - especially in optically complex coastal/inland waters. As with all ocean-color retrievals, uncertainties increase in optically complex coastal/inland waters or under high aerosol/glint; users should refer to per-mission algorithm notes and quality flags before analysis. Usage notes: - Rrs and Rrs_unc are stored as scaled integers; use the scale_factor and add_offset attributes to obtain physical values. - Quality control should use l2_flags per the flag_meanings attribute to mask clouds, land, high glint, and other conditions. Geophysical variables in this suite include: - Rrs - Remote sensing reflectance (sr^-1) - aot_865 - Aerosol optical thickness at 865 nm (unitless) - angstrom - Aerosol Angstrom exponent, 443-865 nm (unitless) - avw - Apparent Visible Wavelength (nm) - nflh - Normalized Fluorescence Line Height (W m^-2 um^-1 sr^-1) - l2_flags — Level-2 processing flags (bitmask; see per-variable attributes for flag_masks and flag_meanings) - Rrs_unc - Uncertainty in remote sensing reflectance (sr^-1)

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    OB_CLOUD Short Name: PACE_OCI_L2_AOP Version ID: 3.2 Unique ID: C4124887023-OB_CLOUD

  • PACE OCI Level-2 Regional Ocean Biogeochemical Properties Data, version 3.2

    https://cmr.earthdata.nasa.gov/search/concepts/C4124887072-OB_CLOUD.xml
    Description:

    The Ocean Color Biogeochemical (OC_BGC) suite provides satellite-derived biogeochemical properties of the upper ocean, produced from calibrated, atmospherically corrected ocean-color inputs from PACE_OCI. These products characterize carbon pools and ecosystem status. Particulate Inorganic Carbon (PIC) includes product of particulate inorganic carbon (calcite, typically from coccolithophores) from ocean-color reflectance using the Balch & Gordon algorithm. PIC is used to detect and quantify coccolithophore blooms, assess carbonate cycling and optical backscatter, and provide biogeochemical context alongside chlor_a, Kd_490, PAR, and SST. Particulate Organic Carbon (POC) includes product of particulate organic carbon concentration from ocean-color reflectance. POC is widely used to quantify surface carbon stocks, support biogeochemical and export-flux studies, and provide ecological context alongside chlor_a, bbp, Kd_490, and SST. Chlorophyll-a (CHL) provides global, gridded composites of surface chlorophyll-a concentration (a proxy for phytoplankton biomass). CHL supports time-series and climatologies, anomaly detection, ecosystem and fisheries applications, and teaching/training, and pairs well with AVW, PAR, Kd(490), SST, and winds for environmental context. Note that retrievals in optically complex coastal/inland waters may carry higher uncertainty—refer to the mission/algorithm documentation (e.g., OCx/OCI) for details. CARBON provides phytoplankton carbon concentration derived from NASA ocean-color observations. Typical uses include quantifying biomass and carbon stocks, assessing ecosystem productivity and change, driving biogeochemical models, and providing biological context alongside chlorophyll, PAR, SST, and other environmental variables. As with all ocean-color retrievals, uncertainties increase in optically complex coastal/inland waters or under high aerosol/glint; users should refer to per-mission algorithm notes and quality flags before analysis. Geophysical variables in this suite include: - chlor_a — Chlorophyll-a concentration (mg m⁻³) - poc — Particulate Organic Carbon (mg m⁻³) - carbon_phyto — Phytoplankton carbon biomass (mg m⁻³) - carbon_phyto_unc — Phytoplankton carbon biomass standard uncertainty (mg m⁻³) - chlor_a_unc — Chlorophyll-a concentration uncertainty (mg m⁻³) - pic — Particulate Inorganic Carbon (Calcite Concentration, CI2 algorithm, C. Mitchell et al., 2017, mol m⁻³) - l2_flags — Level-2 processing flags (bitmask; see per-variable attributes for flag_masks and flag_meanings)

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    OB_CLOUD Short Name: PACE_OCI_L2_BGC Version ID: 3.2 Unique ID: C4124887072-OB_CLOUD

  • PACE OCI Level-1B Science Data, version 3

    https://cmr.earthdata.nasa.gov/search/concepts/C3392966952-OB_CLOUD.xml
    Description:

    Level 1B (L1B) data are Level 1A (L1A) data that have been processed to instrument units (not all instruments have L1B source data).

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    OB_CLOUD Short Name: PACE_OCI_L1B_SCI Version ID: 3 Unique ID: C3392966952-OB_CLOUD

  • PACE OCI Level-2 Regional Ocean Biogeochemical Properties - Near Real-time (NRT) Data, version 3.2

    https://cmr.earthdata.nasa.gov/search/concepts/C4124887054-OB_CLOUD.xml
    Description:

    The Ocean Biology DAAC produces near real-time (NRT) products using the best-available combination of ancillary data from meteorological and ozone data. As such, the inputs and the calibration used are less than optimal. Near real-time products provide a snapshot of the data during a short time period within a single orbit. The Ocean Color Biogeochemical (OC_BGC) suite provides satellite-derived biogeochemical properties of the upper ocean, produced from calibrated, atmospherically corrected ocean-color inputs from PACE_OCI. These products characterize carbon pools and ecosystem status. Particulate Inorganic Carbon (PIC) includes product of particulate inorganic carbon (calcite, typically from coccolithophores) from ocean-color reflectance using the Balch & Gordon algorithm. PIC is used to detect and quantify coccolithophore blooms, assess carbonate cycling and optical backscatter, and provide biogeochemical context alongside chlor_a, Kd_490, PAR, and SST. Particulate Organic Carbon (POC) includes product of particulate organic carbon concentration from ocean-color reflectance. POC is widely used to quantify surface carbon stocks, support biogeochemical and export-flux studies, and provide ecological context alongside chlor_a, bbp, Kd_490, and SST. Chlorophyll-a (CHL) provides global, gridded composites of surface chlorophyll-a concentration (a proxy for phytoplankton biomass). CHL supports time-series and climatologies, anomaly detection, ecosystem and fisheries applications, and teaching/training, and pairs well with AVW, PAR, Kd(490), SST, and winds for environmental context. Note that retrievals in optically complex coastal/inland waters may carry higher uncertainty—refer to the mission/algorithm documentation (e.g., OCx/OCI) for details. CARBON provides phytoplankton carbon concentration derived from NASA ocean-color observations. Typical uses include quantifying biomass and carbon stocks, assessing ecosystem productivity and change, driving biogeochemical models, and providing biological context alongside chlorophyll, PAR, SST, and other environmental variables. As with all ocean-color retrievals, uncertainties increase in optically complex coastal/inland waters or under high aerosol/glint; users should refer to per-mission algorithm notes and quality flags before analysis. Geophysical variables in this suite include: - chlor_a — Chlorophyll-a concentration (mg m⁻³) - poc — Particulate Organic Carbon (mg m⁻³) - carbon_phyto — Phytoplankton carbon biomass (mg m⁻³) - carbon_phyto_unc — Phytoplankton carbon biomass standard uncertainty (mg m⁻³) - chlor_a_unc — Chlorophyll-a concentration uncertainty (mg m⁻³) - pic — Particulate Inorganic Carbon (Calcite Concentration, CI2 algorithm, C. Mitchell et al., 2017, mol m⁻³) - l2_flags — Level-2 processing flags (bitmask; see per-variable attributes for flag_masks and flag_meanings)

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    OB_CLOUD Short Name: PACE_OCI_L2_BGC_NRT Version ID: 3.2 Unique ID: C4124887054-OB_CLOUD

  • PACE OCI Level-2 Regional Surface Reflectance Data, version 3.1

    https://cmr.earthdata.nasa.gov/search/concepts/C3620139902-OB_CLOUD.xml
    Description:

    Surface Reflectance (SFREFL) provides the unitless, bottom-of-atmosphere reflectance of the Earth's surface at 122 wavelengths (346 - 895 nm, with 5 SWIR bands). Surface Reflectance is the foundational input for downstream land products (e.g., vegetation indices included in the LANDVI suite). Users should review the documentation for more information on atmospheric correction and quality flags. Users should also note that the L3M product is masked for clouds. Geophysical variables in this suite include: - rhos – Surface reflectance (unitless) - l2_flags — Level-2 Processing Flags (bitmask)

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    OB_CLOUD Short Name: PACE_OCI_L2_SFREFL Version ID: 3.1 Unique ID: C3620139902-OB_CLOUD

  • PACE OCI Level-2 Regional Land Vegetation Indices Data, version 3.1

    https://cmr.earthdata.nasa.gov/search/concepts/C3620139839-OB_CLOUD.xml
    Description:

    LANDVI suite provides vegetation and land-surface indices derived from surface reflectance. Six of the indices are heritage, and four are hyperspectral-enabled. Users should see documentation for more details. Users should also note that the L3M product is masked for clouds. Geophysical variables in this suite include: - ndvi — Normalized Difference Vegetation Index (unitless) - evi — Enhanced Vegetation Index (unitless) - cire — Chlorophyll Index Red Edge (unitless) - pri — Photochemical Reflectance Index (unitless) - car — Carotenoid Content Index (unitless) - cci — Chlorophyll–Carotenoid Index (unitless) - mari — Anthocyanin Reflectance Index (unitless) - ndii — Normalized Difference Infrared Index (unitless) - ndwi — Normalized Difference Water Index (unitless) - ndsi — Normalized Difference Snow Index (unitless) ARRAY(0x5578184cd058)

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    OB_CLOUD Short Name: PACE_OCI_L2_LANDVI Version ID: 3.1 Unique ID: C3620139839-OB_CLOUD

  • PACE OCI Level-2 Regional Surface Reflectance - Near Real-time (NRT) Data, version 3.1

    https://cmr.earthdata.nasa.gov/search/concepts/C3620139865-OB_CLOUD.xml
    Description:

    The Ocean Biology DAAC produces near real-time (NRT) products using the best-available combination of ancillary data from meteorological and ozone data. As such, the inputs and the calibration used are less than optimal. Near real-time products provide a snapshot of the data during a short time period within a single orbit. Surface Reflectance (SFREFL) provides the unitless, bottom-of-atmosphere reflectance of the Earth’s surface at 122 wavelengths (346 - 895 nm, with 5 SWIR bands). Surface Reflectance is the foundational input for downstream land products (e.g., vegetation indices included in the LANDVI suite). Users should review the documentation for more information on atmospheric correction and quality flags. Users should also note that the L3M product is masked for clouds. Geophysical variables in this suite include: - rhos – Surface reflectance (unitless) - l2_flags – Level-2 Processing Flags (bitmask)

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    OB_CLOUD Short Name: PACE_OCI_L2_SFREFL_NRT Version ID: 3.1 Unique ID: C3620139865-OB_CLOUD

  • PACE OCI Level-3 Global Mapped Ocean Biogeochemical Properties Data, version 3.2

    https://cmr.earthdata.nasa.gov/search/concepts/C4184125847-OB_CLOUD.xml
    Description:

    The Ocean Color Biogeochemical (OC_BGC) suite provides satellite-derived biogeochemical properties of the upper ocean, produced from calibrated, atmospherically corrected ocean-color inputs from PACE_OCI. These products characterize carbon pools and ecosystem status. Particulate Inorganic Carbon (PIC) includes product of particulate inorganic carbon (calcite, typically from coccolithophores) from ocean-color reflectance using the Balch & Gordon algorithm. PIC is used to detect and quantify coccolithophore blooms, assess carbonate cycling and optical backscatter, and provide biogeochemical context alongside chlor_a, Kd_490, PAR, and SST. Particulate Organic Carbon (POC) includes product of particulate organic carbon concentration from ocean-color reflectance. POC is widely used to quantify surface carbon stocks, support biogeochemical and export-flux studies, and provide ecological context alongside chlor_a, bbp, Kd_490, and SST. Chlorophyll-a (CHL) provides global, gridded composites of surface chlorophyll-a concentration (a proxy for phytoplankton biomass). CHL supports time-series and climatologies, anomaly detection, ecosystem and fisheries applications, and teaching/training, and pairs well with AVW, PAR, Kd(490), SST, and winds for environmental context. Note that retrievals in optically complex coastal/inland waters may carry higher uncertainty—refer to the mission/algorithm documentation (e.g., OCx/OCI) for details. CARBON provides phytoplankton carbon concentration derived from NASA ocean-color observations. Typical uses include quantifying biomass and carbon stocks, assessing ecosystem productivity and change, driving biogeochemical models, and providing biological context alongside chlorophyll, PAR, SST, and other environmental variables. As with all ocean-color retrievals, uncertainties increase in optically complex coastal/inland waters or under high aerosol/glint; users should refer to per-mission algorithm notes and quality flags before analysis. Geophysical variables in this suite include: - chlor_a — Chlorophyll-a concentration (mg m⁻³) - poc — Particulate Organic Carbon (mg m⁻³) - carbon_phyto — Phytoplankton carbon biomass (mg m⁻³) - pic — Particulate Inorganic Carbon (Calcite Concentration, CI2 algorithm, C. Mitchell et al., 2017, mol m⁻³)

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    OB_CLOUD Short Name: PACE_OCI_L3M_BGC Version ID: 3.2 Unique ID: C4184125847-OB_CLOUD

  • PACE HARP2 Level-1C Science Data, version 3

    https://cmr.earthdata.nasa.gov/search/concepts/C3555842028-OB_CLOUD.xml
    Description:

    Level 1C (L1C) data are Level 1B (L1B) data that include new variables to describe the spectra. These variables allow the user to identify which L1C channels have been copied directly from the L1B and which have been synthesized from L1B and why.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    OB_CLOUD Short Name: PACE_HARP2_L1C_SCI Version ID: 3 Unique ID: C3555842028-OB_CLOUD

  • PACE HARP2 Level-2 Regional Aerosol Over Ocean Optical Properties, FastMAPOL Algorithm Data, version 3.0

    https://cmr.earthdata.nasa.gov/search/concepts/C3652817390-OB_CLOUD.xml
    Description:

    MAPOL_OCEAN provides simultaneous aerosol and ocean color products using the Fast Multi-Angle Polarimetric Ocean and Land algorithm (FastMAPOL). The retrievals jointly solve for aerosol and ocean parameters with a coupled atmosphere and ocean vector radiative-transfer model, accelerated by deep neural networks to improve speed and accuracy. The retrieved aerosol properties are then used to derive angular water leaving signals through multi-angle atmospheric corrections. Use these products for advanced aerosol and ocean color studies, cross-sensor and cross-algorithm data product analysis. Core geophysical variables in this suite include: - Rrs1/Rrs2 — Angular remote sensing reflectance before and after BRDF correction (sr⁻¹) - chla_mapol — Chlorophyll-a concentration (mg m⁻³) - aot / aot_fine / aot_coarse — Aerosol optical thickness for total/fine/coarse mode (unitless) - ssa / ssa_fine / ssa_coarse — Aerosol single scattering albedo for total/fine/coarse mode (unitless) - fmf / fvf — Aerosol fine mode fraction and fine mode volume fraction (unitless) - angstrom — Aerosol Ångström exponent (unitless; reported for 440–670 nm and 440–870 nm) - alh — Aerosol layer height (km) - reff_fine / reff_coarse — Aerosol effective radius for fine/coarse mode (µm) - veff_fine / veff_coarse — Aerosol effective variance for fine/coarse mode (unitless) - sph / sph_fine / sph_coarse — Aerosol spherical fraction for total/fine/coarse mode (unitless) - mr / mi — Real and imaginary parts of aerosol refractive index (unitless; total/fine/coarse modes available) - vd — Aerosol volume density (µm³ µm⁻²; fine/coarse modes and submodes also available) - wind_speed — Ocean surface wind speed (m s⁻¹)

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    OB_CLOUD Short Name: PACE_HARP2_L2_MAPOL_OCEAN Version ID: 3.0 Unique ID: C3652817390-OB_CLOUD