Articles | Volume 8, issue 1
https://doi.org/10.5194/amt-8-435-2015
https://doi.org/10.5194/amt-8-435-2015
Research article
 | 
27 Jan 2015
Research article |  | 27 Jan 2015

Distinguishing cirrus cloud presence in autonomous lidar measurements

J. R. Campbell, M. A. Vaughan, M. Oo, R. E. Holz, J. R. Lewis, and E. J. Welton

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Cited articles

Cadet, B., Goldfarb, L., Faduilhe, D., Baldy, S., Giraud, V., Keckhut, P., and Réchou, A.: A sub-tropical cirrus clouds climatology from Reunion Island (21_S, 55_E) lidar data set, Geophys. Res. Lett., 30, 1130, https://doi.org/10.1029/2002GL016342, 2003.
Campbell, J. R. and Sassen, K.: Polar Regions stratospheric clouds at the South Pole from 5 years of continuous lidar data: macrophysical, optical, and thermodynamic properties, J. Geophys. Res., 113, D20204, https://doi.org/10.1029/2007JD009680, 2008.
Campbell, J. R. and Shiobara, M.: Glaciation of a mixed-phase boundary layer cloud at a coastal Arctic site as depicted in continuous lidar measurements, Polar Sci., 2, https://doi.org/10.1016/j.polar.2008.04.004, 2008.
Campbell, J. R., Hlavka, D. L., Welton, E. J., Flynn, C. J., Turner, D. D., Spinhirne, J. D., Scott, V. S., and Hwang, I. H.: Full-time, eye-safe cloud and aerosol lidar observation at Atmospheric Radiation Measurement program sites: Instruments and data processing, J. Atmos. Oceanic. Technol., 32, 439–452, 2002.
Chew, B. N., Campbell, J. R., Reid, J. S., Giles, D. M., Welton, E. J., Salinas, S. V., and Liew, S. C.: Tropical cirrus cloud contamination in sun photometer data, Atmos. Environ., 45, 6724–6731, https://doi.org/10.1016/j.atmosenv.2011.08.017, 2011.
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Short summary
Digital thresholds based on 2012 CALIOP satellite lidar measurements are investigated for distinguishing cirrus cloud presence, including cloud top temperatures and heights combined with layer depolarization and phase and optical depths. A cloud top temperature of -37 C is found to exhibit the most stable performance, owing to it being the point of homogeneous liquid-water freezing. Depolarization and phase help but are mostly ambiguous at warmer temperatures where mixed-phase clouds propagate.
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