Articles | Volume 11, issue 10
Atmos. Meas. Tech., 11, 5701–5727, 2018
https://doi.org/10.5194/amt-11-5701-2018

Special issue: CALIPSO version 4 algorithms and data products

Atmos. Meas. Tech., 11, 5701–5727, 2018
https://doi.org/10.5194/amt-11-5701-2018

Research article 18 Oct 2018

Research article | 18 Oct 2018

Extinction and optical depth retrievals for CALIPSO's Version 4 data release

Stuart A. Young et al.

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Cited articles

Avery, M., Ryan, R., Getzewich, B., Vaughan, M., Winker, D., Hu, Y., and Trepte, C.: Impact of Near-Nadir Viewing Angles on CALIOP V4.1 Cloud Thermodynamic Phase Assignments, in preparation, 2018. 
Burton, S. P., Ferrare, R. A., Hostetler, C. A., Hair, J. W., Rogers, R. R., Obland, M. D., Butler, C. F., Cook, A. L., Harper, D. B., and Froyd, K. D.: Aerosol classification using airborne High Spectral Resolution Lidar measurements – methodology and examples, Atmos. Meas. Tech., 5, 73–98, https://doi.org/10.5194/amt-5-73-2012, 2012. 
Burton, S. P., Ferrare, R. A., Vaughan, M. A., Omar, A. H., Rogers, R. R., Hostetler, C. A., and Hair, J. W.: Aerosol classification from airborne HSRL and comparisons with the CALIPSO vertical feature mask, Atmos. Meas. Tech., 6, 1397–1412, https://doi.org/10.5194/amt-6-1397-2013, 2013. 
Chylek, P. and Hallett, J.: Enhanced absorption of solar radiation by cloud droplets containing soot particles in their surface, Q. J. Roy. Meteor. Soc., 118, 167–172, https://doi.org/10.1002/qj.49711850310, 1992. 
del Guasta, M.: Errors in the retrieval of thin-cloud optical parameters obtained with a two-boundary algorithm, Appl. Opt., 37, 5522–5540, https://doi.org/10.1364/AO.37.005522, 1998. 
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Short summary
This paper describes comprehensive upgrades to the algorithms used to retrieve altitude-resolved profiles of cloud and aerosol extinction coefficients from the elastic backscatter measurements made by the space-based CALIPSO lidar. The CALIPSO version 4 data products generated by these new algorithms are explored in detail, and the many areas of improvement are highlighted using extensive comparisons both to previous versions and to collocated measurements made by space-based passive sensors.