Articles | Volume 11, issue 7
Atmos. Meas. Tech., 11, 4273–4289, 2018
https://doi.org/10.5194/amt-11-4273-2018
Atmos. Meas. Tech., 11, 4273–4289, 2018
https://doi.org/10.5194/amt-11-4273-2018

Research article 20 Jul 2018

Research article | 20 Jul 2018

Parameterizing cloud top effective radii from satellite retrieved values, accounting for vertical photon transport: quantification and correction of the resulting bias in droplet concentration and liquid water path retrievals

Daniel P. Grosvenor et al.

Data sets

MODIS data from Level 1 and Atmosphere Archive and Distribution System (LAADS) NASA http://ladsweb.nascom.nasa.gov/

An Improved In Situ and Satellite SST Analysis for Climate (http://www.esrl.noaa.gov/psd/) R. W. Reynolds, N. A. Rayner, T. M. Smith, D. C. Stokes, and W. Wang https://doi.org/10.1175/1520-0442(2002)015<1609:aiisas>2.0.co;2

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Short summary
We provide a parameterized correction to the retrieval of cloud effective radius from satellite instruments to account for the assumption that the retrieved value is representative of that at cloud top, whereas in reality it is representative of that lower down. The error leads to errors (which we quantify) in the retrieved cloud droplet concentrations of up to 38 % for stratocumulus regions and also to liquid water path errors, both of which can be corrected using our parameterizations.