aos > Aerosol Observing SystemInstrument Type(s) > Baseline • External • Guest

The aerosol observing system (AOS) is the primary platform for in situ aerosol measurements at Earth’s surface. Each AOS has a different complement of instruments, which are selected to ensure the best measurements at each deployment site.

The AOS measures aerosol optical properties to better understand how particles interact with solar radiation and influence the Earth’s radiation balance. These measurements are useful for calculating parameters used in radiative forcing calculations, such as the aerosol single scattering albedo, asymmetry parameter, mass scattering efficiency, and hygroscopic growth. Measurements made with the AOS form a long-term record at the ARM fixed sites. Shorter measurement records are available from mobile deployments in a wide variety of geographical regions.  These measurements are valuable for:

  • identifying long-term changes in aerosol properties
  • identifying atmospheric processes controlling aerosol life cycle and their influence on clouds
  • providing experimental data for developing and testing atmospheric climate models.

Reference: Uin J, A Aiken, M Dubey, C Kuang, M Pekour, C Salwen, A Sedlacek, G Senum, S Smith, J Wang, T Watson, and S Springston. 2019. “Atmospheric Radiation Measurement (ARM) Aerosol Observing Systems (AOS) for Surface-Based In-Situ Atmospheric Aerosol and Trace Gas Measurements.” Journal of Atmospheric and Oceanic Technology, 36(12), 10.1175/JTECH-D-19-0077.1.
Research Highlight

Locations

  • Fixed
  • AMF1
  • AMF2
  • AMF3

Components

acsm: Aerosol Chemical Speciation Monitor

acsmcdce: ACSM, corrected for composition-dependent collection efficiency

aeth: Aethalometer

aosmet: Meteorological Measurements associated with the Aerosol Observing System

aps: Aerodynamic Particle Sizer

caps-pmex: Cavity Attenuated Phase Shift Extinction Monitor

ccn: Cloud Condensation Nuclei Particle Counter

clap: Continuous Light Absorption Photometer

co-analyzer: Carbon Monoxide Analyzer

cpc: Condensation Particle Counter

ghg: Greenhouse Gas Monitor

htdma: Humidified Tandem Differential Mobility Analyzer

nephelometer: Nephelometer

nox: Nitrogen Oxides Monitor

ozone: Ozone Monitor

pass: Photoacoustic Soot Spectrometer

pils: Particle Into Liquid Sampler

psap: Particle Soot Absorption Photometer

smps: Scanning mobility particle sizer

so2: Sulfur Dioxide Monitor

sp2: Single Particle Soot Photometer

tao: Tropical Atmosphere Ocean from Buoys

tap: Tricolor Absorption Photometer

tracegas: Trace gas concentrations

uhsas: Ultra-High Sensitivity Aerosol Spectrometer

2021

Shupe M, D Chu, D Costa, C Cox, J Creamean, G de Boer, K Dethloff, R Engelmann, M Gallagher, E Hunke, W Maslowski, A McComiskey, J Osborn, O Persson, H Powers, K Pratt, D Randall, A Solomon, M Tjernstrom, D Turner, J Uin, T Uttal, J Verlinde, and D Wagner. 2021. Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Field Campaign Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-21-007.

DeMott PJ and TC Hill. 2021. COMBLE ARM Mobile Facility (AMF) Measurements of Ice Nucleating Particles Field Campaign Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-21-003.

Creamean J, G de Boer, H Telg, F Mei, D Dexheimer, M Shupe, A Solomon, and A McComiskey. 2021. "Assessing the vertical structure of Arctic aerosols using balloon-borne measurements." Atmospheric Chemistry and Physics, 21(3), 10.5194/acp-21-1737-2021.
Research Highlight

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.

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.

Uin J and S Smith. 2021. Southern Great Plains (SGP) Aerosol Observing System (AOS) Instrument Handbook. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-267.

2020

Uin J and S Smith. 2020. Second ARM Mobile Facility (AMF2) Aerosol Observing System (AOS) Instrument Handbook. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-264.

Uin J and S Smith. 2020. Eastern North Atlantic (ENA) Aerosol Observing System (AOS) Instrument Handbook. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-266.

Uin J and S Smith. 2020. Mobile Aerosol Observing System – Aerosols (MAOS-A) Instrument Handbook. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-263.

Uin J and S Smith. 2020. Mobile Aerosol Observing System – Chemistry (MAOS-C) Instrument Handbook. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-268.


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