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CCN

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ccn > Cloud Condensation Nuclei Particle CounterInstrument Type(s) > Baseline • External • Guest

The cloud condensation nuclei counter measures the concentration of aerosol particles by drawing an air sample through a column with thermodynamically unstable supersaturated water vapor that can condense onto aerosol particles. Particles that are activated, i.e., grown larger in the process, are counted and sized by an optical particle counter (OPC). In this way the CCN measures activated ambient aerosol particle number concentration as a function of supersaturation.

ARM operates both one- and two-column versions of the CCN.

Measurements

Aerosol concentration
Cloud condensation nuclei

Locations

  • Fixed
  • AMF1
  • AMF2
  • AMF3

Active Instrument Locations

Facility Name Instrument Start Date
Houston, TX; AMF1 (main site for TRACER) 2021-04-14
Lamont, OK (Extended and Co-located with C1) 2016-11-16

2021

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. Third ARM Mobile Facility (AMF3) Aerosol Observing System (AOS) Instrument Handbook. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-265.

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.

Zheng G, A Sedlacek, A Aiken, Y Feng, T Watson, S Raveh-Rubin, J Uin, E Lewis, and J Wang. 2020. "Long-range transported North American wildfire aerosols observed in marine boundary layer of eastern North Atlantic." Environment International, 139, 10.1016/j.envint.2020.105680.

Iguchi T, S Rutledge, W Tao, T Matsui, B Dolan, S Lang, and J Barnum. 2020. "Impacts of aerosol and environmental conditions on maritime and continental deep convective systems using a bin microphysical model." Journal of Geophysical Research: Atmospheres, 125(12), e2019JD030952, 10.1029/2019JD030952.

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