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Title: EARLINET correlative measurements for CALIPSO: First intercomparison results
Authors: Pappalardo, Gelsomina 
Wandinger, Ulla 
Mona, Lucia 
Hiebsch, Anja 
Mattis, Ina 
Amodeo, Aldo 
Ansmann, Albert 
Seifert, Patric 
Linné, Holger 
Apituley, Arnoud 
Arboledas, Lucas Alados 
Balis, Dimitris 
Chaikovsky, Anatoli 
D'Amico, Giuseppe 
De Tomasi, Ferdinando 
Freudenthaler, Volker 
Giannakaki, Eleni 
Giunta, Aldo 
Grigorov, Ivan 
Iarlori, Marco 
Madonna, Fabio 
Mamouri, Rodanthi-Elisavet 
Nasti, Libera 
Papayannis, Alexandros D. 
Pietruczuk, Aleksander 
Pujadas, Manuel 
Rizi, Vincenzo 
Rocadenbosch, Francesc 
Russo, Felicita 
Schnell, Franziska 
Spinelli, Nicola 
Wang, Xuan 
Wiegner, Matthias 
Keywords: Aerosol;Dust;Dust aerosols
Category: Civil Engineering
Field: Engineering and Technology
Issue Date: 1-Jan-2010
Source: Journal of Geophysical Research Atmospheres, Volume 115, Issue 4, 2010, Article number D00H19
Journal: Journal of Geophysical Research: Atmospheres 
Abstract: 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. Copyright 2010 by the American Geophysical Union.
ISSN: 21698996
DOI: 10.1029/2009JD012147
Type: Article
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