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Capabilities / Instruments

NEPHELOMETER

Nephelometer

Baseline VAP, Baseline Instrument, External Instrument, Guest

The nephelometer measures the total scattering and hemispheric backscattering of aerosol. Nephelometers are deployed in pairs, with one measuring the ambient conditions and the other measuring the scattering as a function of slowly increasing or decreasing relative humidity (RH). The combination can then be used to derive the hygroscopic growth factor as a function of RH: f(RH).

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

Primary Measurements

Handbook Browse Data

Contact

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Janek Uin
Lead Mentor Brookhaven National Laboratory
Elisabeth Andrews
Lead Mentor: NSA University of Colorado

Related Data Announcements

Aerosol Optical Properties Data Released for TRACER, SAIL Campaigns

References

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Mayol-Bracero et al. ARM FY2025 Aerosol Operations Plan. 2025. 10.2172/2482516.
Uin et al. Nephelometer Instrument Handbook. 2024. 10.2172/1246075.

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Resources

Atmospheric Radiation Measurement (ARM) | Reviewed March 2025