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EARLINET correlative measurements for CALIPSO: first intercomparison results
Pappalardo, Gelsomina; Hiebsch, Anja; Ansmann, Albert; Seifert, Patric; Linné, Holger; Mona, Lucia; Alados Arboledas, Lucas; Apituley, Arnoud; Balis, Dimitris; Chaikovsky, Anatoli; D'Amico, Giuseppe; Amodeo, Aldo; Giunta, Aldo; Freudenthaler, Volker; Giannakaki, E.; Grigorov, I. Ivan; Iarlori, M.; Madonna, Fabio; Mamouri, R.E.; Papayannis, Alexander; Nasti, Libera; Mattis, I.; Pietruczuk, Aleksander; Pujadas Cordero, Manuel; Rocadenbosch Burillo, Francisco; Rizi, Vicenzo; Russo, Felicita; De Tomasi, Ferdinando; Schnell, Franziska; Spinelli, N.; Wandinger, Ulla; Wang, Xuan; Wiegner, M.
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
A strategy for European Aerosol Research Lidar Network (EARLINET) correlative measurements for Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) has been developed. These EARLINET correlative measurements started in June 2006 and are still in progress. Up to now, more than 4500 correlative files are available in the EARLINET database. Independent extinction and backscatter measurements carried out at high-performance EARLINET stations have been used for a quantitative comparison with CALIPSO level 1 data. Results demonstrate the good performance of CALIPSO and the absence of evident biases in the CALIPSO raw signals. The agreement is also good for the distribution of the differences for the attenuated backscatter at 532 nm ((CALIPSO-EARLINET)/EARLINET (%)), calculated in the 1–10 km altitude range, with a mean relative difference of 4.6%, a standard deviation of 50%, and a median value of 0.6%. A major Saharan dust outbreak lasting from 26 to 31 May 2008 has been used as a case study for showing first results in terms of comparison with CALIPSO level 2 data. A statistical analysis of dust properties, in terms of intensive optical properties (lidar ratios, Ångström exponents, and color ratios), has been performed for this observational period. We obtained typical lidar ratios of the dust event of 49 ± 10 sr and 56 ± 7 sr at 355 and 532 nm, respectively. The extinction-related and backscatter-related Ångström exponents were on the order of 0.15–0.17, which corresponds to respective color ratios of 0.91–0.95. This dust event has been used to show the methodology used for the investigation of spatial and temporal representativeness of measurements with polar-orbiting satellites.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica
Remote sensing
Atmosphere -- Laser observations
Teledetecció
Atmosfera -- Observacions amb làser
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
Artículo
American Geophysical Union (AGU)
         

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