LIVAS: a 3-D multi-wavelength aerosol/cloud climatology based on CALIPSO and EARLINET

The authors present an aerosol/cloud ‘climatology’ based on EARLINET, AERONET and CALIPSO retrievals of wavelength dependent aerosol properties. The main emphasis is on the spectral dependence of the extinction and backscatter of representative aerosol types which can be used to convert CALIPSO profiles to other wavelengths (Figure 9, but not referred to in the text). The CALIPSO aerosol classification is the basis for LIVAS. For those aerosol types for which no information is available from EARLINET or AERONET the information is provided through other sources. The LIVAS ‘climatology’ is developed for use in the development of satellite instruments, in particular lidars, working at wavelengths from the UV/VIS to the SWIR. The ‘climatology’ is developed to replace the current ESA reference atmosphere model (RMA) which was developed for a limited region using data from a limited period. The LIVAS data base seems very useful and the MS is in general well written and suitable for publication in ACP. However, reading in detail, there are some questions arising which require correction, see my suggestions below.

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