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  • CALIOP Clear-Sky Constrained Aerosol Extinction Profiles DTDB Version 1

    https://cmr.earthdata.nasa.gov/search/concepts/C3596722736-LARC_CLOUD.xml
    Description:

    CAL_MODIS_DTDB_ext_05km_V4-5_1 provides a global dataset of clear-sky aerosol extinction profiles, enabling improved assessments of aerosols' role in Earth’s climate and air quality systems. Derived from CALIOP data using MODIS Dark Target/Deep Blue (DT/DB) column aerosol optical depth (AOD, Collection 6), the dataset spans daytime observations over land and ocean between 2006 and 2018.    Operational CALIOP aerosol extinction retrievals typically rely on lidar ratios, but uncertainties in these ratios create significant systematic errors (~30–50%). This dataset addresses these challenges by substituting lidar ratios with column-equivalent AODs, enabling the retrieval of aerosol extinction profiles from CALIOP attenuated backscatter data.    Validation against more than 150 coincident airborne High Spectral Resolution Lidar (HSRL) datasets demonstrates strong agreement, with mean bias differences within 0.01 km⁻¹ (10%). The constrained profiles outperform CALIOP V4.51 operational retrievals, reducing both bias and root-mean-square differences by nearly a factor of two.    These constrained CALIOP aerosol extinction profiles are valuable for various applications, including estimating PM2.5 concentrations and reducing uncertainties in aerosol radiative forcing.

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    LARC_CLOUD Short Name: CAL_MODIS_DTDB_ext_05km_V4-5 Version ID: 1 Unique ID: C3596722736-LARC_CLOUD

  • CALIOP Clear-Sky Constrained Aerosol Extinction Profiles MERRA2 Version 1

    https://cmr.earthdata.nasa.gov/search/concepts/C3596722667-LARC_CLOUD.xml
    Description:

    CAL_MERRA2_ext_05km_V4-5_1 provides a comprehensive global dataset of clear-sky aerosol extinction profiles derived from CALIOP data. These retrievals leverage column aerosol optical depth (AOD) obtained from the Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2), which assimilates AOD observations from MODIS, MISR, and AERONET. The dataset spans daytime and nighttime observations over both land and ocean from 2006 to 2023.    Traditional CALIOP aerosol extinction retrievals rely on lidar ratios, introducing significant uncertainties (~30–50%). By substituting lidar ratios with column AOD, we computed constrained aerosol extinction profiles using CALIOP attenuated backscatter data. These profiles were validated against more than 150 coincident airborne High Spectral Resolution Lidar (HSRL) datasets, showing strong agreement with mean bias differences within 0.01 km⁻¹ (10%). Compared to operational CALIOP V4.51 aerosol extinction retrievals, these constrained profiles achieved nearly twofold reductions in bias and root-mean-square errors.  The resulting global dataset holds immense value for critical applications such as estimating PM2.5 concentrations and reducing uncertainties in observational assessments of aerosol direct radiative forcing.

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    LARC_CLOUD Short Name: CAL_MERRA2_ext_05km_V4-5 Version ID: 1 Unique ID: C3596722667-LARC_CLOUD

  • CALIOP Clear-Sky Constrained Aerosol Extinction Profiles ODCOD Version 1

    https://cmr.earthdata.nasa.gov/search/concepts/C3596722811-LARC_CLOUD.xml
    Description:

    CAL_ODCOD_ext_05km_V4-5_1 provides a global dataset of clear-sky aerosol extinction profiles derived from CALIOP data, offering valuable insights into aerosol behavior over oceanic regions from 2006 to 2023. These retrievals use column aerosol optical depth (AOD) from CALIOP Ocean-Derived Column Optical Depth (ODCOD), based on satellite measurements, to constrain the retrieval of extinction profiles during daytime and nighttime over oceans.  Traditional CALIOP aerosol extinction retrievals rely on lidar ratios, introducing significant systematic uncertainties (~30–50%) in extinction estimates. To mitigate these uncertainties, this dataset replaces lidar ratios with column-equivalent AOD from ODCOD, enabling improved retrievals of attenuation profiles globally over oceans.    Validation against more than 150 coincident airborne High Spectral Resolution Lidar (HSRL) datasets demonstrates strong agreement, with mean bias differences within 0.01 km⁻¹ (10%). Compared to CALIOP V4.51 operational aerosol extinction retrievals, the ODCOD-based retrievals reduce bias and RMS differences by nearly a factor of two, significantly improving accuracy.    These ocean-focused CALIOP aerosol extinction profiles are invaluable for studies such as PM2.5 estimation in marine environments and reducing uncertainties in aerosol radiative forcing assessments.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -82 -180 82 180

    LARC_CLOUD Short Name: CAL_ODCOD_ext_05km_V4-5 Version ID: 1 Unique ID: C3596722811-LARC_CLOUD

  • CALIPSO CALIOP Regional Particulate Backscattering Coefficient (Bbp) Data, version 1

    https://cmr.earthdata.nasa.gov/search/concepts/C3574826988-OB_CLOUD.xml
    Description:

    This BBP data suite provides regional estimates of the particulate backscattering coefficient, bbp(532 nm) (units: m⁻¹) derived from the CALIOP lidar aboard CALIPSO. CALIOP’s active 532-nm channel enables nighttime and high-latitude retrievals where passive ocean-color sensors are often limited, and published evaluations show that space-lidar bbp is a strong complement to ocean color and in situ float observations for upper-ocean optical and biogeochemical studies. Typical uses include time-series analysis of particulate optics, high-latitude/seasonal studies, and providing independent constraints for algorithms that link bbp to carbon stocks or phytoplankton dynamics. Users should note CALIOP’s limited subsurface penetration (~a few optical depths) and apply the product’s recommended screening (day/night, quality flags) before analysis. Geophysical variables in this suite include: - bbp – Particulate backscattering coefficient at 532 nm (m⁻¹)

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    OB_CLOUD Short Name: CALIPSO_CALIOP_L3_BBP Version ID: 1 Unique ID: C3574826988-OB_CLOUD

  • CALIPSO IIR Level 1 Calibration Correction data

    https://cmr.earthdata.nasa.gov/search/concepts/C3964848737-LARC_CLOUD.xml
    Description:

    CAL_IIR_L1_COR-Standard-V3-00 is the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) Infrared ImagingRadiometer (IIR) Level 1 Calibration Correction, Version 3-00 data product. The IIR calibration data product contains semi-empirical corrections that were applied to compute the earth view calibrated radiances reported in the Level 1B product. CALIPSO was a partnership between NASA and the French Space Agency, CNES. CALIPSO was launched on April 28, 2006, to study the many roles clouds and aerosols play in Earth’s climate and weather. It flew in the international A-Train constellation for coincident Earth observations from launch until September 13, 2018, when CALIPSO began lowering its orbit from 705 km to 688 km (428 miles) above the Earth to resume formation flying with CloudSat as part of the “C-Train.” The CALIPSO satellite carried three remote sensing instruments: the Cloud-Aerosol Lidar with Orthogonal Polarization(CALIOP), the Imaging Infrared Radiometer (IIR), and the Wide Field-of-View Camera (WFC). By mutual agreement between NASA and CNES, the CALIPSO science mission concluded on August 1, 2023.

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    LARC_CLOUD Short Name: CAL_IIR_L1_COR-Standard-V3-00 Version ID: V3-00 Unique ID: C3964848737-LARC_CLOUD

  • CALIPSO IIR Level 1 Calibration data

    https://cmr.earthdata.nasa.gov/search/concepts/C3964848342-LARC_CLOUD.xml
    Description:

    CAL_IIR_L1_CAL-Standard-V3-00 is the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) Infrared ImagingRadiometer (IIR) Level 1 Calibration, Version 3-00 data product. The IIR calibration data product contains the Space View and Blackbody images with the gains derived in each channel. CALIPSO was a partnership between NASA and the French Space Agency, CNES. CALIPSO was launched on April 28, 2006, to study the many roles clouds and aerosols play in Earth’s climate and weather. It flew in the international A-Train constellation for coincident Earth observations from launch until September 13, 2018, when CALIPSO began lowering its orbit from 705 km to 688 km(428 miles) above the Earth to resume formation flying with CloudSat as part of the “C-Train”.The CALIPSO satellite carried three remote sensing instruments: the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP), the Imaging Infrared Radiometer (IIR), and the Wide Field-of-View Camera (WFC). By mutual agreement between NASA and CNES, the CALIPSO science mission concluded on August 1, 2023.

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    LARC_CLOUD Short Name: CAL_IIR_L1_CAL-Standard-V3-00 Version ID: V3-00 Unique ID: C3964848342-LARC_CLOUD

  • CALIPSO IIR Level 1B radiance data

    https://cmr.earthdata.nasa.gov/search/concepts/C3964848300-LARC_CLOUD.xml
    Description:

    CAL_IIR_L1-Standard-V3-00 data are Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) Infrared ImagingRadiometer (IIR) Level 1B radiance data. The IIR Level 1B data product contains a half orbit of geolocated, calibrated radiances. Earth view images are registered to a 1 km grid centered on the lidar track. CALIPSO was a partnership between NASA and the French Space Agency, CNES.CALIPSO was launched on April 28, 2006, to study the many roles clouds and aerosols play in Earth’s climate and weather. It flew in the international A-Train constellation for coincident Earth observations from launch until September 13, 2018, when CALIPSO began lowering itsorbit from 705 km to 688 km (428 miles) above the Earth to resume formation flying withCloudSat as part of the “C-Train”. The CALIPSO satellite carried three remote sensing instruments: the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP), the ImagingInfrared Radiometer (IIR), and the Wide Field-of-View Camera (WFC). By mutual agreement between NASA and CNES, the CALIPSO science mission concluded on August 1, 2023.

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    LARC_CLOUD Short Name: CAL_IIR_L1-Standard-V3-00 Version ID: V3-00 Unique ID: C3964848300-LARC_CLOUD

  • CALIPSO IIR Lidar Level 3 Global Energy and Water Cycle Experiment (GEWEX) Cloud, Standard V1-00

    https://cmr.earthdata.nasa.gov/search/concepts/C3880518087-LARC_CLOUD.xml
    Description:

    CAL_IIR_L3_GEWEX_Cloud-Standard-V1-00 is the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) IIR Level 3 Global Energy and Water Cycle Experiment (GEWEX) Cloud, Standard Version 1-00 data product. Data for this product was collected using the CALIPSO Imaging Infrared Radiometer (IIR) instrument. This product reports global distributions of IIR cloud effective radius, water path averages, and histograms on a uniform 2-dimensional (2D) spatial grid. This product is designed to follow the general guidance of the GEWEX Cloud Assessment. Cloud amount, radiative temperature, effective emissivity, and optical depth characterize the cloud samples for which IIR microphysical retrievals are reported. Cloud properties are reported for ice clouds, liquid water clouds, and high ice clouds of layer pressure lower than 440 hPa. All level 3 parameters are derived from the IIR version 4 level 2 track products, with the temporal extent averaging one month. CALIPSO was launched on April 28, 2006, to study the impact of clouds and aerosols on the Earth's radiation budget and climate. It flies in the international A-Train constellation for coincident Earth observations. The CALIPSO satellite comprises three instruments: The Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP), Imaging Infrared Radiometer (IIR), and Wide Field Camera (WFC). CALIPSO is a joint satellite mission between NASA and the French Agency, Centre National d'Etudes Spatiales (CNES).

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    LARC_CLOUD Short Name: CAL_IIR_L3_GEWEX_Cloud-Standard-V1-00 Version ID: V1-00 Unique ID: C3880518087-LARC_CLOUD

  • CALIPSO IIR Lidar Level 3 Global Energy and Water Cycle Experiment (GEWEX) Cloud, Standard V2-00

    https://cmr.earthdata.nasa.gov/search/concepts/C3908938884-LARC_CLOUD.xml
    Description:

    CAL_IIR_L3_GEWEX_Cloud-Standard-V2-00_V2-00 are Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) Infrared Imaging Radiometer (IIR) Level 3 Cloud products for the Global Energy and Water Cycle Experiment (GEWEX) Cloud Assessment. The IIR Level 3 GEWEX Cloud product reports global distributions of IIR cloud effective radius and water path averages and histograms on a uniform2-dimensional (2D) spatial grid. Cloud amount, radiative temperature, effective emissivity, and optical depth characterize the cloud samples for which IIR microphysical retrievals are reported. The statistics are reported for atmospheric columns containing only ice clouds, only liquid water clouds, and only high ice clouds of layer pressure lower than 440 hPa. CALIPSO was a partnership between NASA and the French Space Agency, CNES. CALIPSO was launched on April28, 2006 to study the many roles played by clouds and aerosols in Earth’s climate and weather. It flew in the international A-Train constellation for coincident Earth observations from launch until September 13, 2018, when CALIPSO began lowering its orbit from 705 km to 688 km (428 miles)above the Earth to resume formation flying with CloudSat as part of the “C-Train”. The CALIPSO satellite carried three remote sensing instruments: the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP), the Imaging Infrared Radiometer (IIR), and the Wide Field-of-View Camera(WFC). By mutual agreement between NASA and CNES, the CALIPSO science mission concluded on August 1, 2023.

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    LARC_CLOUD Short Name: CAL_IIR_L3_GEWEX_Cloud-Standard-V2-00 Version ID: V2-00 Unique ID: C3908938884-LARC_CLOUD

  • CALIPSO Imaging Infrared Radiometer (IIR) Level 1B Radiance, Standard V2-00

    https://cmr.earthdata.nasa.gov/search/concepts/C3880518290-LARC_CLOUD.xml
    Description:

    CAL_IIR_L1-Standard-V2-00 is the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) Imaging Infrared Radiometer (IIR) Level 1B Radiance, Standard Version 2-00 data product. Data for this product was collected using the CALIPSO IIR instrument. Data collection for this product is ongoing. The IIR Level 1B data product contains a half orbit of geolocated, calibrated radiances. Image data are registered to a 1 km grid centered on the lidar track. The Level 1B data product is written in HDF. CALIPSO was launched on April 28, 2006 to study the impact of clouds and aerosols on the Earth's radiation budget and climate. It flies in the international A-Train constellation for coincident Earth observations. The CALIPSO satellite comprises three instruments, Cloud-Aerosol LIdar with Orthogonal Polarization (CALIOP), IIR, and Wide Field Camera (WFC). CALIPSO is a joint satellite mission between NASA and the French Agency, CNES.

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    Minimum Bounding Rectangle: -90 -180 90 180

    LARC_CLOUD Short Name: CAL_IIR_L1-Standard-V2-00 Version ID: V2-00 Unique ID: C3880518290-LARC_CLOUD