NOAA Climate Data Record (CDR) of AVHRR Daily and Monthly Aerosol Optical Thickness over Global Oceans, Version 2.0 (Version Superseded)

AVHRR Aerosol Optical Thickness; AVHRR AOT

browse graphicAVHRR AOT monthly file example
**Version 2 of the dataset has been superseded by a newer version. Users should not use version 2 except in rare cases (e.g., when reproducing previous studies that used version 2).**This NOAA Climate Data Record (CDR) of Aerosol Optical Thickness (AOT) is derived from data taken over global oceans from the PATMOS-x AVHRR level-2b channel 1 (0.63 micron) orbital clear-sky radiance. The retrieval is performed for selected spatial (8-km) and temporal (1 time per day) resolution in cloud free condition during daytime over global oceans. The AVHRR AOT CDR version 2 extends from 1981 to 2009 and includes both daily and monthly data in an equal angle grid (0.1x0.1 degree). Version 2 has improved cloud screening and data processing from version 1. Due to the relatively large uncertainties associated with surface reflectance over water glint area and land surface as well as limited AVHRR retrieval channels, the current algorithm only performs retrieval over non-glint water surface (specifically at the anti-solar side of the orbit and viewing angle is larger than 40 degree away from the specular ray).
  • Users must cite this dataset as: Xuepeng Zhao, Pui Chan, and NOAA CDR Program (2014): NOAA Climate Data Record (CDR) of AVHRR Daily and Monthly Aerosol Optical Thickness over Global Oceans, Version 2.0. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5SB43PD [access date].
Other Access
  • NCEI Customer Service (offlineAccess)
    For access to this version of the dataset (superseded), please contact the Customer Engagement Branch.
Distribution Formats
  • NetCDF (Version: 4)
Distributor Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Dataset Point of Contact NOAA Climate Data Record Program Office
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
+1 (828) 271-4800
avhrr_aot_contacts@noaa.gov
Time Period 1981-01-01 to 2009-12-31
Spatial Bounding Box Coordinates
N: 90.0
S: -90.0
E: 180.0
W: -180.0
Spatial Coverage Map
Dataset Information
General Documentation
Processing Documents
  • Aerosol Optical Thickness (AOT) Data Flow Diagram
  • Aerosol Optical Thickness (AOT) Climate Algorithm Theoretical Basis Document (C-ATBD)
Associated Resources
Publication Dates
  • publication: 2014-05-19
Edition 2.0
Data Presentation Form Digital image
Dataset Progress Status Complete - production of the data has been completed
Data Update Frequency As needed
Purpose This dataset provides a high quality Climate Data Record (CDR) of aerosol optical thickness (AOT). As a high quality climate data record, this dataset can be used for climate model evaluation as well as air pollution and climate assessment.
Use Limitations
  • For a complete description of use limitations for this CDR, see Section 6, Assumptions and Limitations, in the respective Algorithm Theoretical Basis Document.
Dataset Citation
  • Users must cite this dataset as: Xuepeng Zhao, Pui Chan, and NOAA CDR Program (2014): NOAA Climate Data Record (CDR) of AVHRR Daily and Monthly Aerosol Optical Thickness over Global Oceans, Version 2.0. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5SB43PD [access date].
Cited Authors
  • Xuepeng Zhao
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Pui Chan
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • NOAA CDR Program
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Originators
  • Xuepeng Zhao
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Pui Chan
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • NOAA CDR Program
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Publishers
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • Atmosphere > Aerosols > Aerosol Optical Depth/thickness
GCOS Essential Climate Variables (ECVs)
  • Atmospheric - Composition - Aerosol Properties
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • 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
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • NOAA-7 > National Oceanic & Atmospheric Administration-7
  • NOAA-9 > National Oceanic & Atmospheric Administration-9
  • 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
  • NOAA POES > NOAA Polar Orbiting Environmental Satellites
Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
  • AVHRR > Advanced Very High Resolution Radiometer
  • AVHRR-3 > Advanced Very High Resolution Radiometer-3
  • AVHRR-2 > Advanced Very High Resolution Radiometer-2
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Geographic Region > Global Ocean
Project keywords Keyword Thesaurus Title
  • NOAA Climate Data Record (CDR) Program
Global Change Master Directory (GCMD) Project Keywords
  • NOAA OneStop Project
Data Resolution keywords Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords
  • 50 km - < 100 km or approximately .5 degree - < 1 degree
Use Constraints
  • Version 2 of the dataset has been superseded by a newer version. Users should not use version 2 except in rare cases (e.g., when reproducing previous studies that used version 2).
  • Users must cite this dataset as: Xuepeng Zhao, Pui Chan, and NOAA CDR Program (2014): NOAA Climate Data Record (CDR) of AVHRR Daily and Monthly Aerosol Optical Thickness over Global Oceans, Version 2.0. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5SB43PD [access date].
  • NCEI cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NCEI makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. 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.
Fees
  • In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Lineage Statement For more information, see associated processing documentation.
Processing Documents
    • Aerosol Optical Thickness (AOT) Data Flow Diagram
    • Aerosol Optical Thickness (AOT) Climate Algorithm Theoretical Basis Document (C-ATBD)
Source Datasets
  • Fundamental Climate Data Record (CDR) of Reflectance from AVHRR Bands 1, 2 and 3a
    • AVHRR Reflectance - PATMOS-x
      Landing Page for the NOAA Climate Data Record (CDR) of Reflectance from AVHRR Pathfinder Atmospheres - Extended (PATMOS-x), Version 5.2
    • Description of Source: Data were derived using PATMOS-X v5.2 data
    • Temporal extent used: 1981-01-01 to 2009-12-31
    • Spatial extent used: N:90.0 S:-90.0 E:180.0 W:-180.0
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - 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.
Last Modified: 2018-05-04
For questions about the information on this page, please email: ncei.orders@noaa.gov