VAP : Aerosol Optical Depth, derived from atmospheric extinction of solar irradiance (AOD)

Instrument Categories
Aerosols, 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
NSAC1 Browse DataCentral Facility, Barrow AK
NSAC2 Browse DataCentral Facility, Atqasuk AK retired
Southern Great Plains
SGPC1 Browse DataCentral Facility, Lamont, OK
SGPE1 Browse DataLarned, KS retired
SGPE2 Browse DataHillsboro, KS (Extended) retired
SGPE3 Browse DataLeRoy, KS retired
SGPE4 Browse DataPlevna, KS retired
SGPE5 Browse DataHalstead, KS retired
SGPE6 Browse DataTowanda, KS retired
SGPE7 Browse DataElk Falls, KS retired
SGPE8 Browse DataColdwater, KS retired
SGPE9 Browse DataAshton, KS
SGPE10 Browse DataTyro, KS retired
SGPE11 Browse DataByron, OK
SGPE12 Browse DataPawhuska, OK
SGPE13 Browse DataLamont, OK (Extended)
SGPE15 Browse DataRingwood, OK
SGPE16 Browse DataVici, OK (Extended) retired
SGPE18 Browse DataMorris, OK (Extended) retired
SGPE19 Browse DataEl Reno, OK retired
SGPE20 Browse DataMeeker, OK (Extended) retired
SGPE22 Browse DataCordell, OK retired
SGPE24 Browse DataCyril, OK retired
SGPE25 Browse DataSeminole, OK retired
SGPE27 Browse DataEarlsboro, OK retired
SGPE31 Browse DataAnthony, KS
SGPE32 Browse DataMedford, OK
SGPE33 Browse DataNewkirk, OK
SGPE34 Browse DataMaple City, KS
SGPE35 Browse DataTryon, OK
SGPE36 Browse DataMarshall, OK
SGPE37 Browse DataWaukomis, OK
SGPE38 Browse DataOmega, OK
Tropical Western Pacific
TWPC1 Browse DataCentral Facility, Manus I., PNG retired
TWPC2 Browse DataCentral Facility, Nauru Island retired
TWPC3 Browse DataCentral Facility, Darwin, Australia
ARM Mobile Facility
FKBM1 Browse DataBlack Forest, Germany retired
GANM1 Browse DataGan Airport, Gan Island, Maldives retired
GRWM1 Browse DataGraciosa Island, Azores, Portugal retired
HFEM1 Browse DataShouxian, Anhui, China retired
MAOM1 Browse DataManacapuru, Amazonas, Brazil; AMF1
OLIM1 Browse DataOliktok Point, Alaska
PGHM1 Browse DataARIES Observatory, Nainital, Uttarkhand, India retired
PVCM1 Browse DataHighland Center, Cape Cod MA; AMF 1
PYEM1 Browse DataPoint Reyes, CA retired
SBSM1 Browse DataSteamboat Springs CO, Valley Site retired
TMPM1 Browse DataU. of Helsinki Research Station (SMEAR II), Hyytiala, Finland; AMF2
 retired = Originating instrument has been retired at this location

Contact(s)

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

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

Connor Flynn
Pacific Northwest National Laboratory
Translator
(509) 375-2041
connor.flynn@pnnl.gov