Articles | Volume 11, issue 2
https://doi.org/10.5194/amt-11-861-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-11-861-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Feb 2018
Research article |
| 14 Feb 2018
| 14 Feb 2018
Three-channel single-wavelength lidar depolarization calibration
Department of Physics and Astronomy, The University of Western
Ontario, 1151 Richmond St., London, ON, N6A 3K7, Canada
Department of Physics and Atmospheric Science, Dalhousie
University, 6310 Coburg Rd., P.O. Box 15000, Halifax, NS, B3H
4R2, Canada
Robert J. Sica
Department of Physics and Astronomy, The University of Western
Ontario, 1151 Richmond St., London, ON, N6A 3K7, Canada
James R. Drummond
Department of Physics and Atmospheric Science, Dalhousie
University, 6310 Coburg Rd., P.O. Box 15000, Halifax, NS, B3H
4R2, Canada
Graeme J. Nott
Department of Physics and Atmospheric Science, Dalhousie
University, 6310 Coburg Rd., P.O. Box 15000, Halifax, NS, B3H
4R2, Canada
currently at: Facility for Airborne Atmospheric
Measurements, Building 146, Cranfield University, Cranfield,
MK43 0AL, UK
Christopher Perro
Department of Physics and Atmospheric Science, Dalhousie
University, 6310 Coburg Rd., P.O. Box 15000, Halifax, NS, B3H
4R2, Canada
Thomas J. Duck
Department of Physics and Atmospheric Science, Dalhousie
University, 6310 Coburg Rd., P.O. Box 15000, Halifax, NS, B3H
4R2, Canada
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Short summary
Measuring the phase (liquid and ice) of Arctic clouds is essential for understanding the changing global climate. Using a lidar, two polarized signals are usually needed. At CRL lidar, one of these signals is small, so phase measurements have low resolution. Another method can use a large unpolarized signal in place of the small polarized signal. We show how to use the original low-resolution measurement to calibrate the new high-resolution method. At CRL, this gives 20 times higher resolution.
Measuring the phase (liquid and ice) of Arctic clouds is essential for understanding the...
