LiCal track records

The various installations of LiCal have offered in the last years a significant number of accesses within EARLINET, ACTRIS, ESA-CEOS, ITaRS, as well as for the master and doctoral programs at the Romanian, Italian and German Universities, and national research programs. On average, LiCal installations have hosted about 48 projects (intercomparisons, sample analysis, training, system inspection) and 1260 access days per year, for a number of 51 external users per year, out of which 30 international users. Within the frame of EARLINET and ACTRIS, LiCal has been serving the scientific community (about 20 active lidar stations, regular access), the user community (several lidar/ceilometer operators belonging to weather services and aviation) and the private sector (about 3 companies / developers and integrators). LiCal was also involved in several intercomparison (SLiCE2000, EARLI09, SPALI10, SOLI10, ROLI10, AQUILI12, NALI13, LELI13) and scientific campaigns (ACTRIS SUMMER 2012 Campaign, Charmex EARLINET 72h exercise – Jul. 2012, EMEP summer and winter campaign – Jun.-Jul. 2012 and Jan.-Feb. 2013, Charmex 2013).

This activity strongly contributed to increase the number of available quality assured EARLINET data as demonstrated by the large number of publications collected in the last years (a complete list is reported at www.earlinet.org). In particular EARLINET data have been recently used for aerosol characterization in terms of optical and microphysical properties in conjunction with in situ measurements and transport models (e.g. Pappalardo et al., 2013, Sicard et al., 2012, Wagner et al., 2013, Nicolae et al., 2013). The long-term EARLINET quality assured database is the basis for climatological studies, systematic comparison with models and satellite observations (Mona et al., 2014, Pappalardo et al., 2010). New products were derived as further outcome of this calibration activity, e.g the calibrated linear volume depolarization ratio (Bravo Aranda et al., 2013), the particle linear depolarization ratio (Freudenthaler et al., 2009). At the same time, more and more lidars were upgraded with Raman and depolarization channels.