acsm > Aerosol Chemical Speciation MonitorVAP Type(s) > Baseline • Guest

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

Active Instrument Locations

Facility Name Instrument Start Date
Houston, TX; AMF1 (main site for TRACER) 2021-04-14
Gunnison, CO; Supplemental Facility 2 2021-09-01


Feldman D, A Aiken, W Boos, R Carroll, V Chandrasekar, W Collins, S Collis, J Deems, P DeMott, J Fan, A Flores, D Gochis, J Harrington, M Kumjian, LR Leung, T O'Brien, M Raleigh, A Rhoades, SM Skiles, J Smith, R Sullivan, P Ullrich, A Varble, and K Williams. 2021. Surface Atmosphere Integrated Field Laboratory (SAIL) Science Plan. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-21-004.

Varble A, S Nesbitt, P Salio, J Hardin, N Bharadwaj, P Borque, P DeMott, Z Feng, T Hill, J Marquis, A Matthews, F Mei, R Öktem, V Castro, L Goldberger, A Hunzinger, K Barry, S Kreidenweis, G McFarquhar, L McMurdie, M Pekour, H Powers, D Romps, C Saulo, B Schmid, J Tomlinson, S van den Heever, A Zelenyuk, Z Zhang, and E Zipser. 2021. "Utilizing a Storm-Generating Hotspot to Study Convective Cloud Transitions: The CACTI Experiment." Bulletin of the American Meteorological Society, , 10.1175/BAMS-D-20-0030.1. ONLINE.

Dorsey KS, R Jundt, CB Ireland, MR Wasem, RA Stafford, and A Hunzinger. 2021. 2020 Atmospheric Radiation Measurement (ARM) Annual Report. Ed. by Kathryn Dorsey, U.S. Department of Energy. DOE/SC-ARM-20-020.

Brown H, X Liu, R Pokhrel, S Murphy, Z Lu, R Saleh, T Mielonen, H Kokkola, T Bergman, G Myhre, R Skeie, D Watson-Paris, P Stier, B Johnson, N Bellouin, M Schulz, V Vakkari, J Beukes, P van Zyl, S Liu, and D Chand. 2021. "Biomass burning aerosols in most climate models are too absorbing." Nature Communications, 12(1), 10.1038/s41467-020-20482-9.
Research Highlight

Geerts B, G McFarquhar, L Xue, M Jensen, P Kollias, M Ovchinnikov, M Shupe, P DeMott, Y Wang, M Tjernstrom, P Field, S Abel, T Spengler, R Neggers, S Crewell, M Wendisch, and C Lupkes. 2021. Cold-Air Outbreaks in the Marine Boundary Layer Experiment (COMBLE) Field Campaign Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-21-001.


Logan T, X Dong, B Xi, X Zheng, Y Wang, P Wu, E Marlow, and J Maddux. 2020. "Quantifying long‐term seasonal and regional impacts of North American fire activity on continental boundary layer aerosols and cloud condensation nuclei." Earth and Space Science, 7(1 2), e2020EA001113, 10.1029/2020EA001113.

Zheng G, C Kuang, J Uin, T Watson, and J Wang. 2020. "Large contribution of organics to condensational growth and formation of cloud condensation nuclei (CCN) in the remote marine boundary layer." Atmospheric Chemistry and Physics, 20(21), 10.5194/acp-20-12515-2020.

Nair A and F Yu. 2020. "Using machine learning to derive cloud condensation nuclei number concentrations from commonly available measurements." Atmospheric Chemistry and Physics, 20(21), 10.5194/acp-20-12853-2020.

Johnson J, L Regayre, M Yoshioka, K Pringle, S Turnock, J Browse, D Sexton, J Rostron, N Schutgens, D Partridge, D Liu, J Allan, H Coe, A Ding, D Cohen, A Atanacio, V Vakkari, E Asmi, and K Carslaw. 2020. "Robust observational constraint of uncertain aerosol processes and emissions in a climate model and the effect on aerosol radiative forcing." Atmospheric Chemistry and Physics, 20(15), 10.5194/acp-20-9491-2020.

Watson T, A Aiken, Q Zhang, P Croteau, T Onasch, L Williams, and C Flynn. 2020. Second ARM Aerosol Chemical Speciation Monitor Users’ Meeting Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-249.

View All Related Publications