Aerosol lidar intercomparison in the framework of the EARLINET project. 2. Aerosol backscatter algorithms

Bockmann, C; Wandinger, U; Ansmann, A; Bosenberg, J; Amiridis, V; Boselli, A; Delaval, A; De Tomasi, F; Frioud, M; Grigorov, IV; Hagard, A; Horvat, M; Iarlori, M; Komguem, L; Kreipl, S; Larcheveque, G; Matthias, V; Papayannis, A; Pappalardo, G; Rocadenbosch, F; Rodrigues, JA; Schneider, J; Shcherbakov, V; Wiegner, M

dc.contributor.author	Bockmann, C	en
dc.contributor.author	Wandinger, U	en
dc.contributor.author	Ansmann, A	en
dc.contributor.author	Bosenberg, J	en
dc.contributor.author	Amiridis, V	en
dc.contributor.author	Boselli, A	en
dc.contributor.author	Delaval, A	en
dc.contributor.author	De Tomasi, F	en
dc.contributor.author	Frioud, M	en
dc.contributor.author	Grigorov, IV	en
dc.contributor.author	Hagard, A	en
dc.contributor.author	Horvat, M	en
dc.contributor.author	Iarlori, M	en
dc.contributor.author	Komguem, L	en
dc.contributor.author	Kreipl, S	en
dc.contributor.author	Larcheveque, G	en
dc.contributor.author	Matthias, V	en
dc.contributor.author	Papayannis, A	en
dc.contributor.author	Pappalardo, G	en
dc.contributor.author	Rocadenbosch, F	en
dc.contributor.author	Rodrigues, JA	en
dc.contributor.author	Schneider, J	en
dc.contributor.author	Shcherbakov, V	en
dc.contributor.author	Wiegner, M	en
dc.date.accessioned	2014-03-01T01:19:53Z
dc.date.available	2014-03-01T01:19:53Z
dc.date.issued	2004	en
dc.identifier.issn	0003-6935	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15741
dc.subject.classification	Optics	en
dc.subject.other	Aerosol backscatter algorithms	en
dc.subject.other	Lidar signals	en
dc.subject.other	Algorithms	en
dc.subject.other	Atmospheric aerosols	en
dc.subject.other	Backscattering	en
dc.subject.other	Laser beams	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Optical radar	en
dc.title	Aerosol lidar intercomparison in the framework of the EARLINET project. 2. Aerosol backscatter algorithms	en
heal.type	journalArticle	en
heal.identifier.primary	10.1364/AO.43.000977	en
heal.identifier.secondary	http://dx.doi.org/10.1364/AO.43.000977	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	An intercomparison of aerosol backscatter lidar algorithms was performed in 2001 within the framework of the European Aerosol Research Lidar Network to Establish an Aerosol Climatology (EARLINET). The objective of this research was to test the correctness of the algorithms and the influence of the lidar ratio used by the various lidar teams involved in the EARLINET for calculation of backscatter-coefficient profiles from the lidar signals. The exercise consisted of processing synthetic lidar signals of various degrees of difficulty. One of these profiles contained height-dependent lidar ratios to test the vertical influence of those profiles on the various retrieval algorithms. Furthermore, a realistic incomplete overlap of laser beam and receiver field of view was introduced to remind the teams to take great care in the nearest range to the lidar. The intercomparison was performed in three stages with increasing knowledge on the input parameters. First, only the lidar signals were distributed; this is the most realistic stage. Afterward the lidar ratio profiles and the reference values at calibration height were provided. The unknown height-dependent lidar ratio had the largest influence on the retrieval, whereas the unknown reference value was of minor importance. These results show the necessity of making additional independent measurements, which can provide us with a suitable approximation of the lidar ratio. The final stage proves in general, that the data evaluation schemes of the different groups of lidar systems work well. (C) 2004 Optical Society of America.	en
heal.publisher	OPTICAL SOC AMER	en
heal.journalName	Applied Optics	en
dc.identifier.doi	10.1364/AO.43.000977	en
dc.identifier.isi	ISI:000188510900034	en
dc.identifier.volume	43	en
dc.identifier.issue	4	en
dc.identifier.spage	977	en
dc.identifier.epage	989	en