blc: Belfort Laser Ceilometer

BLC is currently inactive and/or retired. This instrument was replaced by a Vaisala 25k Ceilometer in the summer of 2000.

The Belfort laser ceilometer (BLC) Model 7013C field unit is a self-contained, ground-based, optical, active remote sensing instrument with the ability to detect and process several cloud-related parameters. These parameters include cloud height, extinction coefficient, cloud layers and time/date reference information. The ceilometer system detects clouds by transmitting pulses of infrared light vertically into the atmosphere. The receiver telescope detects scattered light from clouds and precipitation.



  • Fixed
  • AMF1
  • AMF2
  • AMF3

Related Publications


Chen X, X Huang, X Dong, B Xi, E Dolinar, N Loeb, S Kato, P Stackhouse, and M Bosilovich. 2018. "Using AIRS and ARM SGP Clear-Sky Observations to Evaluate Meteorological Reanalyses: A Hyperspectral Radiance Closure Approach." Journal of Geophysical Research: Atmospheres, , 10.1029/2018JD028850. ONLINE.


Zheng X, S Klein, H Ma, P Caldwell, V Larson, A Gettelman, and P Bogenschutz. 2017. "A cloudy planetary boundary layer oscillation arising from the coupling of turbulence with precipitation in climate simulations." Journal of Advances in Modeling Earth Systems, 9(4), doi:10.1002/2017MS000993.
Research Highlight

McGibbon J and CS Bretherton. 2017. "Skill of ship-following large-eddy simulations in reproducing MAGIC observations across the northeast Pacific stratocumulus to cumulus transition region." Journal of Advances in Modeling Earth Systems, 9(2), 10.1002/2017MS000924.


Wu P, X Dong, and B Xi. 2015. "Marine boundary layer drizzle properties and their impact on cloud property retrieval." Atmospheric Measurement Techniques, 8(9), 10.5194/amt-8-3555-2015.
Research Highlight

Qiu S, X Dong, B Xi, and F Li. 2015. "Characterizing Arctic mixed-phase cloud structure and its relationship with humidity and temperature inversion using ARM NSA observations." Journal of Geophysical Research: Atmospheres, 120(15), 10.1002/2014jd023022.
Research Highlight


Dong X, B Xi, A Kennedy, P Minnis, and R Wood. 2014. "A 19-month record of marine aerosol-cloud-radiation properties derived from DOE ARM AMF deployment at the Azores: Part I: Cloud fraction and single-layered MBL cloud properties." Journal of Climate, 27(10), 10.1175/jcli-d-13-00553.1.
Research Highlight


Zhang Y and SA Klein. 2013. "Factors Controlling the Vertical Extent of Fair-Weather Shallow Cumulus Clouds over Land: Investigation of Diurnal-Cycle Observations Collected at the ARM Southern Great Plains Site." Journal of the Atmospheric Sciences, 70(4), 10.1175/jas-d-12-0131.1.
Research Highlight

Kennedy AD, X Dong, and B Xi. 2013. "Cloud Fraction at the ARM SGP Site: Instrument and sampling considerations from 14 years of ARSCL." Theoretical and Applied Climatology, 115(1-2), 10.1007/s00704-013-0853-9.
Research Highlight


Zhao C, S Xie, SA Klein, A Protat, MD Shupe, SA McFarlane, JM Comstock, J Delanoƫ, M Deng, M Dunn, RJ Hogan, D Huang, MP Jensen, GG Mace, R McCoy, EJ O'Connor, DD Turner, and Z Wang. 2012. "Toward understanding of differences in current cloud retrievals of ARM ground-based measurements." Journal of Geophysical Research: Atmospheres, 117(D10), D10206, 10.1029/2011jd016792.


Minnis P, S Sun-Mack, Y Chen, MM Khaiyer, Y Yi, JK Ayers, RR Brown, X Dong, SC Gibson, PW Heck, B Lin, ML Nordeen, L Nguyen, R Palikonda, WL Smith, Jr., DA Spangenberg, Q Trepte, and B Xi. 2011. "CERES Edition-2 Cloud Property Retrievals Using TRMM VIRS and Terra and Aqua MODIS Data—Part II: Examples of Average Results and Comparisons With Other Data." IEEE Transactions on Geoscience and Remote Sensing, 49(11), 10.1109/tgrs.2011.2144602.

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