aps: Aerodynamic Particle Sizer

The aerodynamic particle sizer (APS) is a particle size spectrometer that measures both the particle aerodynamic diameter based on particle time of flight and optical diameter based on scattered light intensity. The APS provides the number size distribution for particles with aerodynamic diameters from 0.5 to 20 micrometers and with optical diameters from 0.3 to 20 micrometers.

The APS is part of the aerosol observing system (AOS).



  • Fixed
  • AMF1
  • AMF2
  • AMF3


Lawler M, D Draper, and J Smith. 2020. "Atmospheric fungal nanoparticle bursts." Science Advances, 6(3), 10.1126/sciadv.aax9051.
Research Highlight


Gunsch M, J Liu, C Moffett, R Sheesley, N Wang, Q Zhang, T Watson, and K Pratt. 2019. "Diesel Soot and Amine-Containing Organic Sulfate Aerosols in an Arctic Oil Field." Environmental Science & Technology, 54(1), 10.1021/acs.est.9b04825.

Marinescu P, E Levin, D Collins, S Kreidenweis, and S van den Heever. 2019. "Quantifying aerosol size distributions and their temporal variability in the Southern Great Plains, USA." Atmospheric Chemistry and Physics, 19(18), 10.5194/acp-19-11985-2019.

Jensen M, E Bruning, D Collins, A Fridlind, P Kollias, C Kuang, D Rosenfeld, A Ryzhkov, A Varble, SD Brooks, S Collis, E Defer, J Fan, J Flynn, S Giangrande, R Griffin, J Hu, R Jackson, M Kumjian, T Logan, T Matsui, G McFarquhar, C Nowotarski, J Quaas, M Oue, R Sheesley, J Snyder, P Stier, S Usenko, S van den Heever, M van Lier Walqui, Y Wang, Y Xu, and G Zhang. 2019. Tracking Aerosol Convection Interactions ExpeRiment (TRACER) Science Plan. Ed. by Robert Stafford, DOE/SC-ARM-19-017.

Hiranuma N, K Adachi, D Bell, F Belosi, H Beydoun, B Bhaduri, H Bingemer, C Budke, H Clemen, F Conen, K Cory, J Curtius, P DeMott, O Eppers, S Grawe, S Hartmann, N Hoffmann, K Höhler, E Jantsch, A Kiselev, T Koop, G Kulkarni, A Mayer, M Murakami, B Murray, A Nicosia, M Petters, M Piazza, M Polen, N Reicher, Y Rudich, A Saito, G Santachiara, T Schiebel, G Schill, J Schneider, L Segev, E Stopelli, R Sullivan, K Suski, M Szakáll, T Tajiri, H Taylor, Y Tobo, R Ullrich, D Weber, H Wex, T Whale, C Whiteside, K Yamashita, A Zelenyuk, and O Möhler. 2019. "A comprehensive characterization of ice nucleation by three different types of cellulose particles immersed in water." Atmospheric Chemistry and Physics, 19(7), doi: 10.5194/acp-19-4823-2019.


Suski K, D Bell, N Hiranuma, O Möhler, D Imre, and A Zelenyuk. 2018. "Activation of intact bacteria and bacterial fragments mixed with agar as cloud droplets and ice crystals in cloud chamber experiments." Atmospheric Chemistry and Physics, 18(23), 10.5194/acp-18-17497-2018.
Research Highlight

Varble A, S Nesbit, P Salio, E Zipser, S van den Heever, G McFarquhar, P Kollias, S Kreidenweis, P DeMott, M Jensen, R Houze, Jr., K Rasmussen, R Leung, D Romps, D Gochis, E Avila, and C Williams. 2018. Cloud, Aerosol, and Complex Terrain Interactions (CACTI) Science Plan. Ed. by Robert Stafford, DOE ARM Climate Research Facility. DOE/SC-ARM-17-004.

Pekour MS and LK Berg. 2018. Aerosol and Cloud Experiments in the Eastern North Atlantic (ACE-ENA) Winter Intensive Operational Period: Aerodynamic Particle Sizer Field Campaign Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-18-025.


Reddington C, K Carslaw, P Stier, N Schutgens, H Coe, D Liu, J Allan, J Browse, K Pringle, L Lee, M Yoshioka, J Johnson, L Regayre, D Spracklen, G Mann, A Clarke, M Hermann, S Henning, H Wex, T Kristensen, W Leaitch, U Pöschl, D Rose, M Andreae, J Schmale, Y Kondo, N Oshima, J Schwarz, A Nenes, B Anderson, G Roberts, J Snider, C Leck, P Quinn, X Chi, A Ding, J Jimenez, and Q Zhang. 2017. "The Global Aerosol Synthesis and Science Project (GASSP): Measurements and modelling to reduce uncertainty." Bulletin of the American Meteorological Society, 98(9), 10.1175/BAMS-D-15-00317.1.

Kassianov E, M Pekour, C Flynn, L Berg, J Beranek, A Zelenyuk, C Zhao, L Leung, P Ma, L Riihimaki, J Fast, J Barnard, A Hallar, I McCubbin, E Eloranta, A McComiskey, and P Rasch. 2017. "Large Contribution of Coarse Mode to Aerosol Microphysical and Optical Properties: Evidence from Ground-based Observations of a Trans-Pacific Dust Outbreak at a High-Elevation North American Site." Journal of the Atmospheric Sciences, 74(5), 10.1175/JAS-D-16-0256.1.
Research Highlight

View All Related Publications