csphot > Cimel SunphotometerInstrument Type(s) > Baseline • External • Guest

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


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.

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.

Thompson D, B Kahn, P Brodrick, M Lebsock, M Richardson, and R Green. 2021. "Spectroscopic imaging of sub-kilometer spatial structure in lower-tropospheric water vapor." Atmospheric Measurement Techniques, 14(4), 10.5194/amt-14-2827-2021.

Feldman D, A Aiken, W Boos, R Carroll, V Chandrasekar, W Collins, S Collis, J Deems, P DeMott, J Fan, A Flores, D Gochis, J Harrington, M Kumjian, LR Leung, T O'Brien, M Raleigh, A Rhoades, SM Skiles, J Smith, R Sullivan, P Ullrich, A Varble, and K Williams. 2021. Surface Atmosphere Integrated Field Laboratory (SAIL) Science Plan. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-21-004.

Kassianov E, E Cromwell, J Monroe, L Riihimaki, C Flynn, J Barnard, J Michalsky, G Hodges, Y Shi, and J Comstock. 2021. "Harmonized and high-quality datasets of aerosol optical depth at a US continental site, 1997–2018." Scientific Data, 8(1), 82 (2021), 10.1038/s41597-021-00866-2.
Research Highlight

Haywood J, S Abel, P Barrett, N Bellouin, A Blyth, K Bower, M Brooks, K Carslaw, H Che, H Coe, M Cotterell, I Crawford, Z Cui, N Davies, B Dingley, P Field, P Formenti, H Gordon, M de Graaf, R Herbert, B Johnson, A Jones, J Langridge, F Malavelle, D Partridge, F Peers, J Redemann, P Stier, K Szpek, J Taylor, D Watson-Parris, R Wood, H Wu, and P Zuidema. 2021. "The CLoud–Aerosol–Radiation Interaction and Forcing: Year 2017 (CLARIFY-2017) measurement campaign." Atmospheric Chemistry and Physics, 21(2), 10.5194/acp-21-1049-2021.


Balmes K and Q FU. 2020. "The diurnally-averaged aerosol direct radiative effect and the use of the daytime-mean and insolation-weighted-mean solar zenith angles." Journal of Quantitative Spectroscopy and Radiative Transfer, 257, 107363, 10.1016/j.jqsrt.2020.107363.

Silva S, D Ridley, and C Heald. 2020. "Exploring the Constraints on Simulated Aerosol Sources and Transport across the North Atlantic with Island‐Based Sun Photometers." Earth and Space Science, 7(11), e2020EA001392, 10.1029/2020EA001392.

Vountas M, K Belinska, V Rozanov, L Lelli, L Mei, S Jafariserajehlou, and J Burrows. 2020. "Retrieval of aerosol optical thickness and surface parameters based on multi-spectral and multi-viewing space-borne measurements." Journal of Quantitative Spectroscopy and Radiative Transfer, 256, 10.1016/j.jqsrt.2020.107311.

Riihimaki L, C Flynn, A McComiskey, D Lubin, Y Blanchard, J Chiu, G Feingold, D Feldman, J Gristey, C Herrera, G Hodges, E Kassianov, S LeBlanc, A Marshak, J Michalsky, P Pilewskie, S Schmidt, R Scott, Y Shea, K Thome, R Wagener, and B Wielicki. 2020. "The Shortwave Spectral Radiometer for Atmospheric Science: Capabilities and Applications from the ARM User Facility." Bulletin of the American Meteorological Society, 102(3), 10.1175/BAMS-D-19-0227.1.

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