II GALION workshop - Geneva, Switzerland – September 21-23, 2010 EARLINET contribution to SDS-WAS Europe – North Africa regional node Lucia Mona Istituto.

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II GALION workshop - Geneva, Switzerland – September 21-23, 2010 EARLINET contribution to SDS-WAS Europe – North Africa regional node Lucia Mona Istituto di Metodologie per l’Analisi Ambientale CNR-IMAA, Potenza, Italy

II GALION workshop - Geneva, Switzerland – September 21-23, 2010 EARLINET ● since 2000 ● 27 lidar stations ● comprehensive, quantitative, and statistically significant data base ● Continental and long-term scale ● multiwavelength Raman lidar stations backscatter (355, 532 and 1064 nm) + extinction (355 and 532 nm) + depol ratio (532 nm) - 10 Raman lidar stations - 7 single backscatter lidar stations

II GALION workshop - Geneva, Switzerland – September 21-23, 2010 EARLINET activities: “Saharan dust” EARLINET is an optimal observation tool for Saharan dust events - dust profiling - stations located in Southern Europe - high performance lidar stations - coverage at continental scale to study transport and modification processes - a suitable observing methodology has been established within the network forecasting scheme [DREAM, Skiron] alert (warnings: h) - use of air-mass back-trajectory analysis [German Meteorological Service (DWD/GME Model) and NOAA HYSPLIT] and satellite data analysis (EP/TOMS AI, SeaWiFS AOD, NOAA/AVHRR AOD, MODIS AOD, CALIPSO)

II GALION workshop - Geneva, Switzerland – September 21-23, June 2006 Saharan dust observed over Potenza EARLINET lidar station (PEARL) MODIS AQUA 2006/177 12:10 UTC

II GALION workshop - Geneva, Switzerland – September 21-23, June 2006 Saharan dust observed over Potenza EARLINET lidar station (PEARL) MODIS AOD (550 nm) =0.33 nm = 0.25 (Lecce) nm = 0.3 (Rome) Potenza, Lidar nm = 0.30 (in the dust layer = 0.25) nm = 0.33 (in the dust layer = 0.25) Typical AOD 355 nm = 0.12 – 0.5 ( )

II GALION workshop - Geneva, Switzerland – September 21-23, 2010 Since May 2000 we have observed more than 400 Saharan dust events First statistical analysis for Saharan dust observations starting from the first 3 years of operation of the network Papayannis et al., JGR 2008 DREAM Forecast is provided for each EARLINET station through the Barcelona Supercomputing Center A systematic comparison between DREAM model and lidar observations is currently in progress A devoted software has been implemented to automatized as much as possible this comparison in order to extend the study to all EARLINET stations but also to other models.

II GALION workshop - Geneva, Switzerland – September 21-23, 2010 Among all EARLINET stations, the Potenza station was selected as the one with the largest database of Saharan dust observations to develop a methodology for the comparison. Comparison for May 2000 – April 2005 period between lidar observations and DREAM forecasts over Potenza. Potenza EARLINET file : typically 30min as temporal resolution – vertical resolution 60 m for backscatter 240 for extinction profiles DREAM profiles: 3h as temporal resolution Only cases in which a Saharan dust layer is identified in the lidar profiles are compared.

II GALION workshop - Geneva, Switzerland – September 21-23, 2010 Comparisons in terms of: Geometrical properties base, top and center of mass of layers identified above the PBL determined starting from both EARLINET and DREAM profiles Extensive properties mean backscatter and extinction from lidar profiles and mean concentration for DREAM profiles in the identified layers integrated quantities i.e. Integrated backscatter, optical depth and aerosol load, in the identified layers Profiles mean profiles of extinction, backscatter and concentration and their variability correlation coefficient for each identified case between extinction (or backscatter) and concentration in the identified layer

II GALION workshop - Geneva, Switzerland – September 21-23, 2010 Base Lidar = (3.6 ± 0.9) km Base Dream = (3.2 ± 0.9) km Top Lidar = (8.5 ± 1.8) km Top Dream = (11 ± 2) km Geometrical properties CoM Lidar = (4.5 ± 1.2) km CoM Dream = (4.4 ± 1.1) km

II GALION workshop - Geneva, Switzerland – September 21-23, 2010 Linear correlation r = Linear correlation r = Extensive properties Linear correlation r = 0.79 Linear correlation r = 0.90

II GALION workshop - Geneva, Switzerland – September 21-23, 2010 Backscatter profiles Extinction profiles

II GALION workshop - Geneva, Switzerland – September 21-23, 2010  EARLINET Quicklook data related to SD could be made available in near real time  Quantitative comparison with the Dream model will be extended to the whole network  Conversion factors, microphysical properties, intrusion in the PBL  Quantitative/qualitative comparisons with all the other existing models  Quantitative EARLINET data in near real time - Single Calculus Chain is under testing phase - SCC has been already installed at BSC Planned activities related to SDS-WAS