Instrument : Aerosol Chemical Speciation Monitor (ACSM)

Instrument Categories

The Aerosol Chemical Speciation Monitor is a thermal vaporization, electron impact ionization mass spectrometer that measures bulk chemical composition of the non-refractory component of sub-micron aerosol particles in real time with typically 30-minute integration period. Standard derived quantities are the mass-concentrations in ug/m^3 of organics, sulfate, nitrate, ammonium, and chloride.

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

Output Datastreams

  • aosacsm : AOS: aerosol chemical speciation monitor

Primary Measurements

The following measurements are those considered scientifically relevant.


Eastern North Atlantic
ENAC1 Browse Data Browse PlotsGraciosa Island, Azores, Portugal
Southern Great Plains
SGPC1 Browse Data Browse PlotsCentral Facility, Lamont, OK
ARM Mobile Facility
MAOS1 Browse Data Browse PlotsManacapuru, Amazonas, Brazil; MAOS
PVCS1 Browse Data Browse PlotsHighland Center, Cape Cod MA; MAOS retired
 retired = Originating instrument has been retired at this location

See Also


Thomas Watson
Brookhaven National Laboratory
(631) 344-4517

Stephen Springston
Brookhaven National Laboratory
(631) 344-4477

Cynthia Salwen
Brookhaven National Laboratory

Bill Behrens
Brookhaven National Laboratory
(631) 344-2906