Aerosol Optical Depth Product Generates New Data

Published: 21 October 2021

A plot showing aerosol optical depths shows five different colors representing 415, 500, 615, 673, and 870 nm.
The colors represent aerosol optical depths measured at five different wavelengths with the multifilter rotating shadowband radiometer on June 19, 2019, at Oliktok Point, Alaska.

New data are now available from the Aerosol Optical Depth value-added product derived from multifilter rotating shadowband radiometer measurements (AOD-MFRSR VAP).

AOD is the measure of the total aerosol burden in a vertical column of the atmosphere. AOD-MFRSR reports cloud-screened AOD from the direct normal irradiance measured by MFRSRs at the Atmospheric Radiation Measurement (ARM) user facility’s ground-based sites.

AOD-MFRSR data from December 31, 2019, through January 24, 2020, are now available for ARM’s Eastern North Atlantic atmospheric observatory in the Azores. In addition, data from September 12, 2016, through March 30, 2021, are newly available for the now-inactive ARM site at Oliktok Point, Alaska.

For other ARM sites, the VAP stopped processing because of changes in input data. Those issues have been resolved, and the VAP has resumed processing. Data gaps are filled in for the following sites and date ranges:

  • Southern Great Plains (SGP) Central Facility (Lamont, Oklahoma): December 5, 2018, through December 14, 2020
  • SGP extended facilities E9 (Ashton, Kansas); E31 (Anthony, Kansas); E34 (Maple City, Kansas); E36 (Marshall, Oklahoma); and E37 (Waukomis, Oklahoma): December 5, 2018, through May 1, 2020
  • SGP E11 (Byron, Oklahoma): December 6, 2018, through April 16, 2020
  • SGP E12 (Pawhuska, Oklahoma) and E13 (Lamont): December 5, 2018, through April 18, 2020
  • SGP E15 (Ringwood, Oklahoma): December 5, 2018, through April 17, 2020
  • SGP E32 (Medford, Oklahoma): December 14, 2017, through May 1, 2020
  • SGP E33 (Newkirk, Oklahoma): December 5, 2018, through April 30, 2020
  • SGP E35 (Tryon, Oklahoma): December 5, 2017, through August 23, 2020
  • North Slope of Alaska atmospheric observatory (Utqiaġvik, formerly known as Barrow): June 18, 2017, through August 3, 2020.

Scientists can use the new AOD-MFRSR data now. Access the data in the ARM Data Center. (Go here to create an account to download the data.)

More information about AOD-MFRSR can be found on the VAP web page. For questions about the VAP, please contact ARM translator John Shilling or developer Krista Gaustad.

To cite the AOD-MFRSR data, please use doi:10.5439/1356805.

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ARM is a DOE Office of Science user facility operated by nine DOE national laboratories.