acsm: Aerosol Chemical Speciation Monitor

The Aerosol Chemical Speciation Monitor is a thermal vaporization, electron impact, ionization mass spectrometer that measures bulk chemical composition of the rapidly evaporating component of sub-micron aerosol particles in real time. Standard measurements include mass concentrations of organics, sulfate, nitrate, ammonium, and chloride.



  • Fixed
  • AMF1
  • AMF2
  • AMF3

Related Publications


Watson T, A Aiken, Q Zhang, P Croteau, T Onasch, L Williams, and C Flynn. 2018. First ARM Aerosol Chemical Speciation Monitor Users’ Meeting Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-215.

PZ, M Alvarado, C Chiu, S DeSzoeke, C Fairall, G Feingold, A Freedman, S Ghan, J Haywood, P Kollias, E Lewis, G McFarquhar, A McComiskey, D Mechem, T Onasch, J Redemann, D Romps, D Turner, H Wang, R Wood, S Yuter, and P Zhu. 2018. Layered Atlantic Smoke Interactions with Clouds (LASIC) Field Campaign Report. Ed. by Robert Stafford, ARM Climate Research Facility. DOE/SC-ARM-18-018.

Berry J, D Day, T Elseberg, B Palm, W Hu, A Abdelhamid, J Schroder, U Karst, J Jimenez, and E Browne. 2018. "Laser Ablation-Aerosol Mass Spectrometry-Chemical Ionization Mass Spectrometry for Ambient Surface Imaging." Analytical Chemistry, 90(6), 10.1021/acs.analchem.7b05255.


Jefferson A, D Hageman, H Morrow, F Mei, and T Watson. 2017. "Seven years of aerosol scattering hygroscopic growth measurements from SGP: Factors influencing water uptake." Journal of Geophysical Research: Atmospheres, 122(17), 10.1002/2017JD026804.

Watson TB. 2017. Aerosol Chemical Speciation Monitor (ACSM) Instrument Handbook. Ed. by Robert Stafford, ARM Climate Research Facility. DOE/SC-ARM-TR-196.


Mahish M, DR Collins, A Jefferson, PJ Marinescu, EJ Levin, PJ DeMott, and SM Kreidenweis. 2016. Seasonal and Interannual Variations in Aerosol Characteristics at the ARM Southern Great Plains Site. Presented at Annual American Meteorological Society (AMS) Meeting. Seattle, WA.


Parworth C, J Fast, F Mei, T Shippert, C Sivaraman, A Tilp, T Watson, and Q Zhang. 2015. "Long-term measurements of submicrometer aerosol chemistry at the Southern Great Plains (SGP) using an Aerosol Chemical Speciation Monitor (ACSM)." Atmospheric Environment, 106, 10.1016/j.atmosenv.2015.01.060.
Research Highlight


Fast J, Q Zhang, A Tilp, T Shippert, C Parworth, and F Mei. 2013. Organic Aerosol Component (OACOMP) Value-Added Product Report. U.S. Department of Energy. DOE/SC-ARM-TR-131.

Mather JH and JW Voyles. 2013. "The Arm Climate Research Facility: A Review of Structure and Capabilities." Bulletin of the American Meteorological Society, 94(3), 10.1175/bams-d-11-00218.1.
Research Highlight

Watson T. 2013. TCAP 1 Particle-into-liquid-sampler Aircraft Data. Presented at 4th Atmospheric System Research (ASR) Science Team Meeting. Potomac, MD.

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