csphot: Cimel Sunphotometer

The Cimel sunphotometer (CSPHOT) is a multi-channel, automatic sun-and-sky scanning radiometer that measures the direct solar irradiance and sky radiance at the Earth’s surface. It takes measurements at predetermined discrete wavelengths in the visible and near-infrared parts of the spectrum to determine atmospheric transmission and scattering properties. The CSPHOT only operates during daylight (sun above horizon).


  • Fixed
  • AMF1
  • AMF2
  • AMF3


Marchand R. 2020. Macquarie Island Cloud and Radiation Experiment (MICRE) Field Campaign Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-20-005.

Bellouin N, J Quaas, E Gryspeerdt, S Kinne, P Stier, D Watson‐Parris, O Boucher, K Carslaw, M Christensen, A Daniau, J Dufresne, G Feingold, S Fiedler, P Forster, A Gettelman, J Haywood, U Lohmann, F Malavelle, T Mauritsen, D McCoy, G Myhre, J Mülmenstädt, D Neubauer, A Possner, M Rugenstein, Y Sato, M Schulz, S Schwartz, O Sourdeval, T Storelvmo, V Toll, D Winker, and B Stevens. 2020. "Bounding Global Aerosol Radiative Forcing of Climate Change." Reviews of Geophysics, 58(1), 10.1029/2019RG000660.

Riihimaki L, C Flynn, and A McComiskey. 2020. ARM Shortwave Spectral Radiometry Strategy Review Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-20-003.

Lubin D, D Zhang, I Silber, R Scott, P Kalogeras, A Battaglia, D Bromwich, M Cadeddu, E Eloranta, A Fridlind, A Frossard, K Hines, S Kneifel, W Leaitch, W Lin, J Nicolas, H Powers, P Quinn, P Rowe, L Russell, S Sharma, J Verlinde, and A Vogelmann. 2020. "AWARE: The Atmospheric Radiation Measurement (ARM) West Antarctic Radiation Experiment." Bulletin of the American Meteorological Society, , 10.1175/BAMS-D-18-0278.1. ONLINE.


Varble A, S Nesbitt, P Salio, E Avila, P Borque, P DeMott, G McFarquhar, S van den Heever, E Zipser, D Gochis, R Houze, M Jensen, P Kollias, S Kreidenweis, R Leung, K Rasmussen, D Romps, and C Williams. 2019. Cloud, Aerosol, and Complex Terrain Interactions (CACTI) Field Campaign Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-19-028.

Yang W, A Marshak, and G Wen. 2019. "Cloud edge properties measured by the ARM shortwave spectrometer over ocean and land." Journal of Geophysical Research: Atmospheres, 124(15), doi: 10.1029/2019JD030622.
Research Highlight

Liu J and Z Li. 2019. "Aerosol properties and their influences on low warm clouds during the Two-Column Aerosol Project." Atmospheric Chemistry and Physics, 19(14), 10.5194/acp-19-9515-2019.


Kassianov E, J Monroe, L Riihimaki, C Flynn, E Cromwell, G Hodges, and A McComiskey. 2018. Climatology of aerosol optical depth at mid-continental US site: ground-based observations. In SPIE Remote Sensing, 2018, Berlin, Germany, .

Delgadillo R, K Voss, and P Zuidema. 2018. "Characteristics of Optically Thin Coastal Florida Cumuli Derived From Surface-Based Lidar Measurements." Journal of Geophysical Research: Atmospheres, 123(18), 10.1029/2018JD028867.

Sheesley RJ and CE Moffett. 2018. Characterizing Potential Radiative Forcing on the North Slope of Alaska Field Campaign Report. Ed. by Robert Stafford, ARM Climate Research Facility. DOE/SC-ARM-18-016.

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