Reprocessed Radiative Flux Analysis VAP Data Now Available

 
Published: 22 September 2020
This plot shows reprocessed irradiance and albedo from the Radiative Flux Analysis (RADFLUXANAL) value-added product for March 13, 2014, at ARM’s Eastern North Atlantic atmospheric observatory.

Reprocessed data from the Radiative Flux Analysis (RADFLUXANAL) value-added product (VAP) have been released for multiple Atmospheric Radiation Measurement (ARM) user facility sites.

RADFLUXANAL calculates clear-sky irradiance in the shortwave and longwave surface fluxes from the measured broadband irradiance. This VAP also calculates fractional sky cover and cloud parameters, including effective visible cloud optical depth, cloud radiating temperature, and shortwave cloud transmissivity, from the measurements.

RADFLUXANAL data needed to be reprocessed after the correction of input data from the Data Quality Assessment for ARM Radiation Data (QCRAD) VAP. QCRAD is the recommended ARM datastream for broadband surface irradiance measurements. A few bugs were found in the qcrad1long code, including a Celsius to Kelvin bug that caused incorrect Dutton coefficients. This affected the infrared-corrected global downwelling shortwave hemispheric irradiance (down_short_hemisp).

Affected measurements in the radflux1long datastream were:

  • estimated clear-sky broadband downwelling shortwave irradiance (clearsky_downwelling_shortwave)
  • estimated shortwave fractional sky cover (cloudfraction_shortwave)
  • shortwave cloud transmissivity (cloud_transmissivity_shortwave)
  • broadband downwelling shortwave irradiance from the sum or global pyranometer (downwelling_shortwave).

Reprocessed RADFLUXANAL c2-level data are available for the following ARM sites:

  • Eastern North Atlantic atmospheric observatory on Graciosa Island, Azores: October 3, 2013, through September 21, 2017
  • North Slope of Alaska atmospheric observatory at Utqiaġvik (formerly Barrow), Alaska: September 7, 2014, through September 16, 2017
  • Oliktok Point, Alaska: February 20, 2014, through October 2, 2017
  • Southern Great Plains (SGP) Central Facility near Lamont, Oklahoma: July 7, 2014, through June 5, 2016
  • SGP extended facility E9 (Ashton, Kansas): July 11, 2014, through May 29, 2016
  • SGP extended facility E11 (Byron, Oklahoma): July 25, 2014, through May 29, 2016
  • SGP extended facility E12 (Pawhuska, Oklahoma): July 20, 2014, through May 27, 2016
  • SGP extended facility E13 (Lamont, Oklahoma): June 22, 2012, through June 15, 2017
  • SGP extended facility E15 (Ringwood, Oklahoma): July 11, 2014, through June 5, 2016
  • SGP extended facility E21 (Okmulgee, Oklahoma): July 8, 2014, through June 7, 2016
  • SGP extended facility E31 (Anthony, Kansas): October 13, 2011, through May 29, 2016
  • SGP extended facility E32 (Medford, Oklahoma): February 5, 2012, through July 9, 2016
  • SGP extended facility E33 (Newkirk, Oklahoma): August 25, 2011, through July 22, 2016
  • SGP extended facility E34 (Maple City, Kansas): September 4, 2011, through July 22, 2016
  • SGP extended facility E35 (Tryon, Oklahoma): October 6, 2011, through July 19, 2016
  • SGP extended facility E36 (Marshall, Oklahoma): September 28, 2011, through July 19, 2016
  • SGP extended facility E37 (Waukomis, Oklahoma): September 28, 2011, through July 17, 2016
  • SGP extended facility E38 (Omega, Oklahoma): August 25, 2011, through July 17, 2016
  • SGP extended facility E39 (Morrison, Oklahoma): October 6, 2015, through July 21, 2016
  • SGP extended facility E40 (Pawnee, Oklahoma): October 8, 2015, through June 19, 2017
  • SGP extended facility E41 (Peckham, Oklahoma): April 21, 2016, through June 23, 2017.

In addition, new RADFLUXANAL c2-level data are available from the sites listed above. Read about the new data in this announcement.

Scientists can use the RADFLUXANAL data now. To access these data, please log in to the ARM Data Center. (Go here to create an account to download the data.)

More information about RADFLUXANAL can be found on the VAP web page. To share your experience with RADFLUXANAL—such as how you use the data and how well they work for you—or to ask a question, contact ARM translator Damao Zhang.

To cite the RADFLUXANAL data, please use doi:10.5439/1395157.

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