Atmospheric Radiation Measurement Climate Research Facility US Department of Energy

nephelometer > NephelometerInstrument Type(s) > Baseline • External • 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).


  • Fixed
  • AMF1
  • AMF2
  • AMF3


Petäjä T, K Tabakova, A Manninen, E Ezhova, E O’Connor, D Moisseev, V Sinclair, J Backman, J Levula, K Luoma, A Virkkula, M Paramonov, M Räty, M Äijälä, L Heikkinen, M Ehn, M Sipilä, T Yli-Juuti, A Virtanen, M Ritsche, N Hickmon, G Pulik, D Rosenfeld, D Worsnop, J Bäck, M Kulmala, and V Kerminen. 2021. "Influence of biogenic emissions from boreal forests on aerosol–cloud interactions." Nature Geoscience, 15(1), 10.1038/s41561-021-00876-0.

Andrews E. 2021. Comparison of X1 (OLD) and X3 (NEW) Aerosol Observing Systems at the North Slope of Alaska NOAA Observatory. Ed. by Robert Stafford, ARM user facility. DOE-SC-ARM-TR-276. 10.2172/1838010.

Testa B, T Hill, N Marsden, K Barry, C Hume, Q Bian, J Uetake, H Hare, R Perkins, O Möhler, S Kreidenweis, and P DeMott. 2021. "Ice nucleating particle connections to regional Argentinian land surface emissions and weather during the Cloud, Aerosol, and Complex Terrain Interactions experiment." Journal of Geophysical Research: Atmospheres, 126(23), e2021JD035186, 10.1029/2021JD035186.

Titos G, M Burgos, P Zieger, L Alados-Arboledas, U Baltensperger, A Jefferson, J Sherman, E Weingartner, B Henzing, K Luoma, C O'Dowd, A Wiedensohler, and E Andrews. 2021. "A global study of hygroscopicity-driven light-scattering enhancement in the context of other in situ aerosol optical properties." Atmospheric Chemistry and Physics, 21(17), 10.5194/acp-21-13031-2021.

Russell LM, D Lubin, I Silber, E Eloranta, J Muelmenstaedt, S Burrows, A Aiken, D Wang, M Petters, M Miller, A Ackerman, A Fridlind, M Witte, M Lebsock, D Painemal, R Chang, J Liggio, and M Wheeler. 2021. Eastern Pacific Cloud Aerosol Precipitation Experiment (EPCAPE) Science Plan. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-21-009. 10.2172/1804710.

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