VAP : Aerosol Optical Depth (AOD)

Instrument Categories
Derived Quantities and Models

The core purpose of the ARM Facility is to reduce uncertainties in climate model predictions. A dominant source of uncertainty in these models is the radiative impact of aerosols, which has spawned a major effort in ARM to measure aerosol properties.

The Aerosol Optical Depth (AOD) value-added product (VAP) is concerned with several important aerosol radiative properties. The most important of these is the aerosol optical depth (AOD), which is a measure of the total aerosol burden in the atmosphere. The spectral dependence of AOD, typically described by the Angstrom exponent, is also an indicator of particle size, with large particles having Angstrom exponent values near zero and smaller particles exhibiting larger Angstrom exponent values. Improved knowledge of these basic aerosol properties will help reduce the uncertainties associated with aerosol effects in climate models.

The AODs have been derived from the MFRSR, NIMFR and SASHE instruments. For more information about these products, please refer to the MFRSR/NIMFR technical report and SASHE technical report or to the output product pages linked below.

Output Products

  • mfrsraod1mich : MFRSR: derived total & aerosol optical depth from 1st Michalsky algorithm
  • nimfraod1mich : NIMFR: derived total & aerosol optical depth from 1st Michalsky algorithm
  • sasheniraod : Shortwave Array Spectroradiometer-Hemispheric, NIR Aerosol Optical Depths
  • sashevisaod : Shortwave Array Spectroradiometer-Hemispheric, VIS Aerosol Optical Depths

Primary Measurements

The following measurements are those considered scientifically relevant.

Locations

North Slope Alaska
NSAC1Browse DataCentral Facility, Barrow AK
NSAC2Browse DataCentral Facility, Atqasuk AK
Southern Great Plains
SGPC1Browse DataCentral Facility, Lamont, OK
SGPE1Browse DataLarned, KS
SGPE2Browse DataHillsboro, KS (Extended)
SGPE3Browse DataLeRoy, KS
SGPE4Browse DataPlevna, KS
SGPE5Browse DataHalstead, KS
SGPE6Browse DataTowanda, KS
SGPE7Browse DataElk Falls, KS
SGPE8Browse DataColdwater, KS
SGPE9Browse DataAshton, KS
SGPE10Browse DataTyro, KS
SGPE11Browse DataByron, OK
SGPE12Browse DataPawhuska, OK
SGPE13Browse DataLamont, OK (Extended)
SGPE15Browse DataRingwood, OK
SGPE16Browse DataVici, OK (Extended)
SGPE18Browse DataMorris, OK (Extended)
SGPE19Browse DataEl Reno, OK
SGPE20Browse DataMeeker, OK (Extended)
SGPE22Browse DataCordell, OK
SGPE24Browse DataCyril, OK
SGPE25Browse DataSeminole, OK
SGPE27Browse DataEarlsboro, OK
SGPE31Browse DataAnthony, KS
SGPE32Browse DataMedford, OK
SGPE33Browse DataNewkirk, OK
SGPE34Browse DataMaple City, KS
SGPE35Browse DataTryon, OK
SGPE36Browse DataMarshall, OK
SGPE37Browse DataWaukomis, OK
SGPE38Browse DataOmega, OK
Tropical Western Pacific
TWPC1Browse DataCentral Facility, Manus I., PNG
TWPC2Browse DataCentral Facility, Nauru Island
TWPC3Browse DataCentral Facility, Darwin, Australia
ARM Mobile Facility
FKBM1Browse DataBlack Forest, Germany
GANM1Browse DataGan Airport, Gan Island, Maldives
GRWM1Browse DataGraciosa Island, Azores, Portugal
HFEM1Browse DataShouxian, Anhui, China
PVCM1Browse DataHighland Center, Cape Cod MA; AMF 1
PYEM1Browse DataPoint Reyes, CA
SBSM1Browse DataSteamboat Springs CO, Valley Site

Contact(s)

Annette Koontz
Developer-MFRSRAOD
(509) 375-3609
annette.koontz@pnnl.gov

Brian Ermold
Developer-SASHEAOD
(509) 375-2277
brian.ermold@pnnl.gov

Connor Flynn
Translator
(509) 375-2041
connor.flynn@pnnl.gov