Instrument : Nephelometer (NEPHELOMETER)

Instrument Categories

A nephelometer measures the total scattering and hemispheric backscattering of aerosol. Nephelometers are deployed in pairs with one of them measuring the ambient conditions and the other measuring the scattering as a function of slowly increasing or decreasing relative humidity. The combination can then be used to derive the hygroscopic growth factor as a function of RH: f(RH).

The NEPHELOMETER is part of the Aerosol Observing System (AOS).

Output Datastreams

  • aosnephdry : AOS: ambient nephelometer measurements
  • aosnephwet : AOS: humidified nephelometer measurements

Primary Measurements

The following measurements are those considered scientifically relevant.


Eastern North Atlantic
ENAC1 Browse DataGraciosa Island, Azores, Portugal
North Slope Alaska
NSAX1 Browse DataExternal Data (satellites and others)
Southern Great Plains
SGPC1 Browse Data Browse PlotsCentral Facility, Lamont, OK
ARM Mobile Facility
ACXM1 Browse DataOff the Coast of California - NOAA Ship Ronald H. Brown; AMF2
MAGM1 Browse DataLos Angeles, CA to Honolulu, HI - container ship Horizon Spirit; AMF2 retired
MAOM1 Browse DataManacapuru, Amazonas, Brazil; AMF1
PGHM1 Browse DataARIES Observatory, Nainital, Uttarkhand, India retired
PVCM1 Browse DataHighland Center, Cape Cod MA; AMF 1
SBSS2 Browse DataSteamboat Springs CO, Christie Peak retired
TMPS1 Browse DataU. of Helsinki Research Station (SMEAR II), Hyytiala, Finland; AOS
 retired = Originating instrument has been retired at this location

See Also


Anne Jefferson
(303) 497-6493

Gunnar Senum
Brookhaven National Laboratory
(631) 344-3896

Stephen Springston
Brookhaven National Laboratory
(631) 344-4477

Janek Uin
Brookhaven National Laboratory

Scott Smith
Brookhaven National Laboratory
(631) 344-7197

Cynthia Salwen
Brookhaven National Laboratory