Journal Article

Lidar-Radiometer Inversion Code (LIRIC) for the retrieval of vertical aerosol properties from combined lidar/radiometer data: development and distribution in EARLINET

Wandinger, Ulla, Chaikovskaya, Ludmila, Pietruczuk, Alexander, Giles, David, Tanré, Didier, Freudenthaler, Volker, Talianu, Camelia, Sicard, Michaël, Bril, Andrey, Kokkalis, Panayotis, Pappalardo, Gelsomina, Allados-Arboledas, Lucas, Grudo, Jan, Nicolae, Doina, Lopatin, Anton, Tsekeri, Alexandra, Papayannis, Alex, Rocadenbosch, Francesc, Amiridis, Vassilis, Granados-Muñoz, María José, Oshchepkov, Sergey, Apituley, Arnoud, Wagner, Janet, Binietoglou, Ioannis, Wang, Xuan, D'Amico, Giuseppe, De Tomasi, Ferdinando, Dubovik, Oleg, Boselli, Antonella, Slutsker, Ilya, Lapyonok, Tatsiana, Chaikovsky, Anatoli, Ansmann, Albert, Goloub, Philippe, Karol, Yana, Perrone, Maria Rita, Holben, Brent, Denisov, Sergey

2016

Overview

This paper presents a detailed description of LIRIC (LIdar-Radiometer Inversion Code) algorithm for simultaneous processing of coincident lidar and radiometric (sun photometric) observations for the retrieval of the aerosol concentration vertical profiles. As the lidar/radiometric input data we use measurements from European Aerosol Research Lidar Network (EARLINET) lidars and collocated sun-photometers of Aerosol Robotic Network (AERONET). The LIRIC data processing provides sequential inversion of the combined lidar and radiometric data. The algorithm starts with the estimations of column-integrated aerosol parameters from radiometric measurements followed by the retrieval of height dependent concentrations of fine and coarse aerosols from lidar signals using integrated column characteristics of aerosol layer as a priori constraints. The use of polarized lidar observations allows us to discriminate between spherical and non-spherical particles of the coarse aerosol mode.The LIRIC software package was implemented and tested at a number of EARLINET stations. Intercomparison of the LIRIC-based aerosol retrievals was performed for the observations by seven EARLINET lidars in Leipzig, Germany on 25 May 2009. We found close agreement between the aerosol parameters derived from different lidars that supports high robustness of the LIRIC algorithm. The sensitivity of the retrieval results to the possible reduction of the available observation data is also discussed.

• Publisher: Copernicus GmbH,European Geosciences Union,Copernicus Publications
• Subject: Aerosol concentrations / Aerosol properties / Aerosol research / Aerosol Robotic Network / Aerosols / Algorithms / Atmosfera / Atmosphere / Chemical properties / Computer software / Contaminació atmosfèrica / Data / Data analysis / Data processing / Degradació ambiental / Desenvolupament humà i sostenible / Enginyeria de la telecomunicació / Environmental aspects / Experiments / Intercomparison / Inversion / Laser observations / Lidar / Observacions amb làser / Optical radar / Parameter estimation / Parameters / Photometers / Pollutants / Profiles / Radiocomunicació i exploració electromagnètica / Radiometers / Remote sensing / Retrieval / Sciences of the Universe / Teledetecció / Vertical profiles / Àrees temàtiques de la UPC