gov.noaa.ncdc:C00876 eng; USA utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact 2025-12-10T16:17:56 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA Climate Data Record (CDR) of Cloud and Clear-Sky Radiation Properties, Version 1.0 AVHRR Cloud Properties - NASA 2015-03-01 publication Version 1.0 doi:10.7289/V5HT2M8T NCEI DSI 2005_01 gov.noaa.ncdc:C00876 NOAA National Centers for Environmental Information publisher DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce User Engagement and Services Branch 1-828-271-4800 1-828-271-4876 151 Patton Avenue Veach-Baley Federal Building, Room 468 Asheville NC 28801-5001 USA ncei.orders@noaa.gov https://www.ncdc.noaa.gov HTTPS Web Browser NOAA National Centers for Environmental Information (NCEI) NCEI home page with information, data access, and customer support contacts. information 8:00 - 6:00 Eastern publisher Minnis, Patrick Science Directorate, NASA Langley Research Center Senior Scientist p.minnis@nasa.gov principalInvestigator Minnis, Patrick Science Directorate, NASA Langley Research Center Senior Scientist p.minnis@nasa.gov author Bedka, Kristopher Science Directorate, NASA Langley Research Center Scientist k.bedka@nasa.gov principalInvestigator Bedka, Kristopher Science Directorate, NASA Langley Research Center Scientist k.bedka@nasa.gov author NOAA CDR Program +1 828-271-4800 cdr-ipt-cloud_bundle@noaa.gov collaborator NOAA CDR Program +1 828-271-4800 cdr-ipt-cloud_bundle@noaa.gov author documentDigital The NASA LaRC cloud and clear sky radiation properties dataset is generated using algorithms initially developed for application to TRMM and MODIS imagery within the NASA CERES program. The algorithms have been adapted to operate upon AVHRR, an instrument that has fewer spectral channels than MODIS. This dataset utilizes calibrated AVHRR reflectances from a companion FCDR. Cloud and clear-sky radiation properties are derived globally at the 4 km Global Area Coverage pixel scale during both day and night using this approach. CDR quality variables include: Cloud and clear sky pixel detection (count), Cloud top thermodynamic phase (count), Cloud optical depth (count), Cloud particle effective radius (micrometers), Air pressure at effective cloud top (hPa), Air temperature at effective cloud top (K), and Height at effective cloud top (km). Other Non-CDR Quality Variables include: Air pressure at cloud top (hPa), Air temperature at cloud top (K), Height at cloud top (km), Height at cloud base (km), Air pressure at cloud base (hPa), Overshooting cloud top detection mask (count), Land and sea surface temperature retrieval (K), Shortwave broadband albedo (unit less), Longwave broadband flux (W/m2), Snow and ice cover flag (count), Land and sea surface temperature retrieval quality flag (count), Clear sky pixel classification (count), Cloudy pixel classification (count) The dataset is intended to identify global cloud cover and cloud macro- and microphysical properties throughout the entire AVHRR data record which extends from 1978 to the present. This CDR provides data at the highest spatial resolution of any existing cloud climatology. We address AVHRR sensor noise and errant navigation in a robust manner. AVHRR shortwave channel calibration is referenced to Aqua MODIS and is the highest quality of any AVHRR-based cloud climatology. Daytime and night-time cloud properties are provided which offers advantages over many other climatologies that are daytime-only. Nearly all the CDR products have been validated using NASA A-Train observations which has not been done for many of the other global climatologies. Possible uses for this data include tracking temporal trends in global cloud cover and properties, such as the energy industry determining cloud frequency for determining appropriate use of alternative energy solutions. NOAA National Centers for Environmental Information Customer Engagement Branch 1-828-271-4800 1-828-271-4876 151 Patton Avenue Veach-Baley Federal Building, Room 468 Asheville NC 28801-5001 USA ncei.orders@noaa.gov https://www.ncei.noaa.gov HTTPS Web Browser NOAA National Centers for Environmental Information (NCEI) NCEI home page with information, data access and contact information. information 8:00 - 6:00 Eastern pointOfContact National Centers for Environmental Information NOAA Climate Data Record Program Office +1 828-271-4800 cdr-ipt-cloud_bundle@noaa.gov pointOfContact monthly https://www.ncei.noaa.gov/pub/data/metadata/images/C00876.PNG Sample image from dataset PNG Earth Science > Atmosphere > Clouds > Cloud Microphysics Earth Science > Atmosphere > Clouds > Cloud Properties Earth Science > Atmosphere > Clouds > Cloud Types Earth Science > Atmosphere > Clouds > Convective Clouds/Systems (observed/Analyzed) Earth Science > Atmosphere > Clouds > Stratospheric Clouds (observed/Analyzed) Earth Science > Atmosphere > Clouds > Tropospheric/High-Level Clouds (observed/Analyzed) Earth Science > Atmosphere > Clouds > Tropospheric/Low Level Clouds (observed/Analyzed) Earth Science > Atmosphere > Clouds > Tropospheric/Mid-Level Clouds (observed/Analyzed) Earth Science > Atmosphere > Atmospheric Radiation > Longwave Radiation Earth Science > Atmosphere > Atmospheric Radiation > Optical Depth/Thickness Earth Science > Atmosphere > Atmospheric Radiation > Outgoing Longwave Radiation Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Skin Temperature Earth Science > Climate Indicators > Atmospheric/Ocean Indicators > Cloud Indicators Earth Science > Atmosphere > Weather Events > Rain Storms theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Atmospheric - Upper-air - Cloud Properties theme Global Climate Observing System (GCOS) Essential Climate Variables (ECVs) 2017 publication Release 2017 World Meteorological Organization, United Nations https://public.wmo.int/en/programmes/global-climate-observing-system/essential-climate-variables HTTP Information GCOS Essential Climate Variables Overview of the GCOS Essential Climate Variables. information custodian NOAA Climate Data Record (CDR) Program NOAA OneStop Project project Global Change Master Directory (GCMD) Project Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Satellite product Geographic Region > Global place Global Change Master Directory (GCMD) Location Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Vertical Location > Boundary Layer Vertical Location > Stratosphere stratum Global Change Master Directory (GCMD) Location Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher AVHRR > Advanced Very High Resolution Radiometer AVHRR-2 > Advanced Very High Resolution Radiometer-2 AVHRR-3 > Advanced Very High Resolution Radiometer-3 instrument Global Change Master Directory (GCMD) Instrument Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher TIROS-N > Television Infrared Observation Satellite-N NOAA-6 > National Oceanic & Atmospheric Administration-6 NOAA-7 > National Oceanic & Atmospheric Administration-7 NOAA-8 > National Oceanic & Atmospheric Administration-8 NOAA-9 > National Oceanic & Atmospheric Administration-9 NOAA-10 > National Oceanic & Atmospheric Administration-10 NOAA-11 > National Oceanic & Atmospheric Administration-11 NOAA-12 > National Oceanic & Atmospheric Administration-12 NOAA-14 > National Oceanic & Atmospheric Administration-14 NOAA-15 > National Oceanic & Atmospheric Administration-15 NOAA-16 > National Oceanic & Atmospheric Administration-16 NOAA-17 > National Oceanic & Atmospheric Administration-17 NOAA-18 > National Oceanic & Atmospheric Administration-18 NOAA-19 > National Oceanic & Atmospheric Administration-19 METOP-A > Meteorological Operational Satellite - A METOP-B > Meteorological Operational Satellite - B platform Global Change Master Directory (GCMD) Platform Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher 1 km - < 10 km or approximately .01 degree - < .09 degree dataResolution Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Hourly - < Daily dataResolution Global Change Master Directory (GCMD) Temporal Data Resolution Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher > 1 km dataResolution Global Change Master Directory (GCMD) Vertical Data Resolution Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Science Directorate, Langley Research Center, NASA dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher See the Algorithm Theoretical Basis Document for a description of the use limitations for this dataset. Cloud pixel detection is CDR quality during both day and night, but is not CDR quality at night over snow/ice covered regions. Cloud optical depth and effective radius is not CDR quality at night or over snow/ice covered regions. There are significant issues with noise in 3.74 um radiances prior to NOAA-15. While efforts have been made to address the noise issue, no method can do this perfectly and this will have an impact on the cloud detection and retrieval results. NOAA-16 and -17, and MetOp-A and -B all switch the Channel 3 data from 3.74 um to 1.61 um during the day. The cloud algorithms must be adjusted to account for this channel switch and this will have an impact on the cloud detection and retrieval results. TIROS-N, NOAA-6, -8, and -10 do not have a 12 um channel. The 12 um channel is quite important at night so we expect that this will have a significant impact on the cloud detection and retrieval results. The term "daytime" above implies a solar zenith angle < 82 deg otherRestrictions Cite as: Minnis, Patrick; Bedka, Kristopher; and the NOAA CDR Program (2015): NOAA Climate Data Record (CDR) of Cloud and Clear-Sky Radiation Properties, Version 1.0. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.789/V5HT2M8T [access date]. otherRestrictions See the Use Agreement for this CDR available on the CDR page. otherRestrictions Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. NOAA Climate Data Record (CDR) of Visible and Near Infrared Reflectance from AVHRR, Version 1.0 2015-03-01 publication 1.0 DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce publisher https://doi.org/10.7289/V5NK3C0J HTTPS Landing Page NCEI landing page for AVHRR Radiances - NASA Related dataset landing page with general information and access links for that dataset. information largerWorkCitation collection 4000 eng; USA climatologyMeteorologyAtmosphere 1 -180.0 180.0 -90.0 90.0 ground condition 1978 2016 2 NSS.GHRR.[SatID].D[Date].S[StartTime].E[EndTime]_NASA_LaRC_cloud_properties.nc physicalMeasurement latitude float latitude (latitude) longitude float longitude (longitude) year_and_dayofyear int Scan Line Year and Day of Year in YYYYDDD Format time int Scan Line Time (time) reflectance_063micron int NOAA Climate Data Record of AVHRR 0.63 Micron Channel Reflectance (toa_bidirectional_reflectance) reflectance_086micron int NOAA Climate Data Record of AVHRR 0.86 Micron Channel Reflectance (toa_bidirectional_reflectance) reflectance_161micron int NOAA Climate Data Record of AVHRR 1.61 Micron Channel Reflectance (toa_bidirectional_reflectance) brightness_temperature_375micron short AVHRR 3.75 Micron Channel Brightness Temperature (brightness_temperature) brightness_temperature_108micron short AVHRR 10.8 Micron Channel Brightness Temperature (brightness_temperature) brightness_temperature_120micron short AVHRR 12.0 Micron Channel Brightness Temperature (brightness_temperature) cloud_mask byte NOAA Climate Data Record of Cloudy and Clear Sky Pixel Detection (cloud_binary_mask) cloud_phase byte NOAA Climate Data Record of Cloud Top Thermodynamic Phase (thermodynamic_phase_of_cloud_water_particles_at_cloud_top) optical_depth short NOAA Climate Data Record of Cloud Optical Depth (atmosphere_optical_thickness_due_to_cloud) effective_radius short NOAA Climate Data Record of Particle Effective Radius (effective_radius_of_cloud_liquid_water_particle_at_liquid_water_cloud_top) cloud_top_pressure short Cloud Top Pressure (air_pressure_at_cloud_top) cloud_effective_pressure short NOAA Climate Data Record of Air Pressure At Effective Cloud Top (air_pressure_at_effective_cloud_top_defined_by_infrared_radiation) cloud_base_pressure short Cloud Base Pressure (air_pressure_at_cloud_base) cloud_top_height short Cloud Top Height (cloud_top_altitude) cloud_effective_height short NOAA Climate Data Record of Height At Effective Cloud Top (height_at_effective_cloud_top_defined_by_infrared_radiation) cloud_base_height short Cloud Base Height (cloud_base_altitude) cloud_top_temperature short Cloud Top Temperature (air_temperature_at_cloud_top) cloud_effective_temperature short NOAA Climate Data Record of Air Temperature At Effective Cloud Top (air_temperature_at_effective_cloud_top_defined_by_infrared_radiation) overshooting_mask byte Overshooting Convective Cloud Top Detection Mask pixel_skin_temperature short Clear Sky Surface Skin Temperature (surface_temperature) shortwave_broadband_albedo short Top of Atmosphere Shortwave Broadband Albedo (toa_outgoing_shortwave_flux) longwave_broadband_flux short Top of Atmosphere Longwave Broadband Flux (toa_outgoing_longwave_flux) relative_azimuth short Relative Azimuth Angle (relative_sensor_azimuth_angle) viewing_zenith short Viewing Zenith Angle (zenith_angle) solar_zenith short Solar Zenith Angle (solar_zenith_angle) snowice_flag byte Snow and Ice Cover Analysis or Detection from MERRA and AVHRR pixel_skin_temperature_quality_flag byte Quality Flag for Pixel Level Skin Temperature Retrieval clear_sky_category byte Clear Sky Pixel Classification cloud_category byte Cloudy Pixel Classification NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information distributor In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. netCDF 4 The NetCDF data files comply with the Climate and Forecast (CF) Metadata Conventions and the NetCDF Attribute Convention for Dataset Discovery (ACDD). netCDF 4 The NetCDF data files comply with the Climate and Forecast (CF) Metadata Conventions and the NetCDF Attribute Convention for Dataset Discovery (ACDD). https://doi.org/10.7289/V5HT2M8T HTTPS Landing Page NCEI Dataset Landing Page Landing page for the dataset. information https://www.ncdc.noaa.gov/has/HAS.FileAppRouter?datasetname=200501&subqueryby=STATION&applname=&outdest=FILE HTTPS Data Search Application NCEI Archive Information Request System (AIRS) Search the data archive and submit an order for the dataset via the interface. download https://www.ncei.noaa.gov/products/climate-data-records/avhrr-cloud-properties-nasa HTTPS Landing Page AVHRR Cloud Properties - NASA Access to the published CDR, source code, and documentation. information dataset The data were produced by the NASA Langley Research Center, and are archived at the NOAA National Centers for Environmental Information (NCEI). The reflectances used in the calculation of these cloud properties are included in the archived file. For more information, please review dataset CATB-D For a description of the processing steps, see the Algorithm Theoretical Basis Document and Data Flow Diagram for this dataset. NASA Langley Research Center processor Source Code Package for AVHRR Cloud Properties - NASA 2015-03-01 publication National Centers for Environmental Information publisher https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/AVHRR_Cloud_Properties_NASA/SourceCode_01B-30b.tar.gz HTTPS Web Browser CDR Source Code This source code is for reference only. The source code is provided to maintain transparency of the algorithm and processes used in creating the Climate Data Record (CDR). The source code is not intended to be portable to any computer system(s) beyond that of the original CDR producer's environment. download NASA LaRC AVHRR & GOES Shortwave Channel Calibration FCDR Top Level Flowchart 2016-09-22 publication Rev 1 CDRP-DIA-0828 National Centers for Environmental Information publisher https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/AVHRR_Cloud_Properties_NASA/DataFlowDiagram_01B-30b.pdf HTTPS Web Browser CDR Data Flow Diagram Flowcharts for the CDR product. information Climate Algorithm Theoretical Basis Document for AVHRR Radiances - NASA 2022-09-16 publication Rev 1 publisher https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/AVHRR_Cloud_Properties_NASA/AlgorithmDescription_01B-30b.pdf HTTPS Web Browser Climate Algorithm Theoretical Basis Document ATBD for the CDR product. information Please review associated documentation for more information about the dataset's creation. Please note that the source dataset is included in the original data files for the NOAA CDR Cloud and Clear-Sky Radiation Properties V1.0 dataset. NOAA Climate Data Record (CDR) of Visible and Near Infrared Reflectance from GOES and AVHRR, Version 1.0 Version 1.0 gov.noaa.ncdc:C00860 National Centers for Environmental Information distributor https://doi.org/10.7289/V5NK3C0J HTTPS Landing Page NOAA Climate Data Record (CDR) of Visible and Near Infrared Reflectance from GOES and AVHRR, Version 1.0 landing page For more information about the source dataset, please review the landing page. information 1 -180 180 -90 90 1978-01-01 repository NOAA National Centers for Environmental Information NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015. 2015-04-22T00:00:00 asNeeded Bulk metadata change applied on 2023-06-23. See version control repository history for metadata change details.