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Climate Data Record (CDR) of AVHRR Daily and Monthly Aerosol Optical Thickness over Global Oceans, Version 2.0 (Version Superseded)

Published by DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 03, 2026 at 06:40 AM | Dataset Last Updated: May 19, 2014 at 12:00 AM
*Note: This dataset version has been superseded by a newer version. It is highly recommended that users access the current version. Users should only use this version for special cases, such as reproducing studies that used this version.* 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).

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  • NCEI Dataset Landing Page

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  • Contact NCEI

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  • NCEI Dataset Landing Page for the Current Version

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  • A global survey of the effect of cloud contamination on the aerosol optical thickness and its long-term trend derived from operational AVHRR satellite observations (Science Paper)

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  • Long-Term Aerosol Climate Data Record Derived from Operational AVHRR Satellite Observations (Science Paper)

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  • Overview of the AVHRR Aerosol Optical Thickness CDR

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  • Global Change Master Directory (GCMD) Keywords

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  • GCOS Essential Climate Variables

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  • NOAA Climate Data Record Program

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Earth Science > Atmosphere > Aerosols > Aerosol Optical Depth/Thickness Atmospheric - Composition - Aerosol Properties NOAA Climate Data Record (CDR) Program Satellite Geographic Region > Global Ocean NOAA OneStop Project AVHRR > Advanced Very High Resolution Radiometer AVHRR-3 > Advanced Very High Resolution Radiometer-3

Complete Metadata
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accessLevel non-public
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description *Note: This dataset version has been superseded by a newer version. It is highly recommended that users access the current version. Users should only use this version for special cases, such as reproducing studies that used this version.* 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).
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identifier https://data.noaa.gov/waf/NOAA/NESDIS/ncei/aim/iso/xml/C00858.xml
isPartOf A global survey of the effect of cloud contamination on the aerosol optical thickness and its long-term trend derived from operational AVHRR satellite observations
issued 2014-05-19T00:00:00.000+00:00
keyword 
[
  "Earth Science > Atmosphere > Aerosols > Aerosol Optical Depth/Thickness",
  "Atmospheric - Composition - Aerosol Properties",
  "NOAA Climate Data Record (CDR) Program",
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  "Geographic Region > Global Ocean",
  "NOAA OneStop Project",
  "AVHRR > Advanced Very High Resolution Radiometer",
  "AVHRR-3 > Advanced Very High Resolution Radiometer-3",
  "AVHRR-2 > Advanced Very High Resolution Radiometer-2",
  "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",
  "50 km - < 100 km or approximately .5 degree - < 1 degree",
  "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",
  "01B-04"
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landingPage https://www.ncdc.noaa.gov/
language 
[]
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2014-05-19T00:00:00.000+00:00
publisher 
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  "https://doi.org/DOI:10.1002/jgrd.50278",
  "https://doi.org/10.7167/2013/140791",
  "https://www.ncei.noaa.gov/pub/data/sds/cdr/flyers/CDR_Flyer_Aerosol_Optical_Thickness.pdf"
]
rights otherRestrictions
spatial 180.0,-90.0,-180.0,90.0
temporal 1981-01-01T00:00:00+00:00/2009-12-31T00:00:00+00:00
theme 
[
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]
title NOAA Climate Data Record (CDR) of AVHRR Daily and Monthly Aerosol Optical Thickness over Global Oceans, Version 2.0 (Version Superseded)

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