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A methodology for investigating dust model performance using synergistic EARLINET/AERONET dust concentration retrievals

handle: 20.500.14243/290376 , 11587/397054 , 2117/78531
A methodology for investigating dust model performance using synergistic EARLINET/AERONET dust concentration retrievals
Abstract. Systematic measurements of dust concentration profiles at continental scale were recently made possible by the development of synergistic retrieval algorithms using combined lidar and sun photometer data and the establishment of robust remote-sensing networks in the framework of Aerosols, Clouds, and Trace gases Research InfraStructure Network (ACTRIS)/European Aerosol Research Lidar Network (EARLINET). We present a methodology for using these capabilities as a tool for examining the performance of dust transport models. The methodology includes considerations for the selection of a suitable dataset and appropriate metrics for the exploration of the results. The approach is demonstrated for four regional dust transport models (BSC-DREAM8b v2, NMMB/BSC-DUST, DREAMABOL, DREAM8-NMME-MACC) using dust observations performed at 10 ACTRIS/EARLINET stations. The observations, which include coincident multi-wavelength lidar and sun photometer measurements, were processed with the Lidar-Radiometer Inversion Code (LIRIC) to retrieve aerosol concentration profiles. The methodology proposed here shows advantages when compared to traditional evaluation techniques that utilize separately the available measurements such as separating the contribution of dust from other aerosol types on the lidar profiles and avoiding model assumptions related to the conversion of concentration fields to aerosol extinction values. When compared to LIRIC retrievals, the simulated dust vertical structures were found to be in good agreement for all models with correlation values between 0.5 and 0.7 in the 1 to 6 km range, where most of dust is typically observed. The absolute dust concentration was typically underestimated with mean bias values of −40 to −20 μg m−3 at 2 km, the altitude of maximum mean concentration. The reported differences among the models found in this comparison indicate the benefit of the systematic use of the proposed approach in future dust model evaluation studies.
- University of Belgrade Serbia
- Polish Academy of Learning Poland
- National Research Council Italy
- University of Belgrade, Computer Centre Serbia
- Polish Academy of Sciences Poland
Radiació solar, synergistic EARLINET/AERONET, aerosol, Remote-sensing networks, Fotometria, Environmental engineering, investigating, Optical radar, Aerosols atmosfèrics, Mineral dust, Aire -- Qualitat -- Mesurament, Photometry, Earthwork. Foundations, Air quality – Measurement, Solar radiation, sun-photometer, Redes de teledetección, model, TA715-787, :Enginyeria electrònica::Optoelectrònica [Àrees temàtiques de la UPC], methodology, Pols mineral, Atmospheric Aerosol. Remote sensing, TA170-171, Àrees temàtiques de la UPC::Enginyeria electrònica::Optoelectrònica, Atmospheric aerosols, Radar òptic, Dust transport models, Polvo del desierto, desert dust, lidar measurements, Dust concentration, Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica, performance, :Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica [Àrees temàtiques de la UPC]
Radiació solar, synergistic EARLINET/AERONET, aerosol, Remote-sensing networks, Fotometria, Environmental engineering, investigating, Optical radar, Aerosols atmosfèrics, Mineral dust, Aire -- Qualitat -- Mesurament, Photometry, Earthwork. Foundations, Air quality – Measurement, Solar radiation, sun-photometer, Redes de teledetección, model, TA715-787, :Enginyeria electrònica::Optoelectrònica [Àrees temàtiques de la UPC], methodology, Pols mineral, Atmospheric Aerosol. Remote sensing, TA170-171, Àrees temàtiques de la UPC::Enginyeria electrònica::Optoelectrònica, Atmospheric aerosols, Radar òptic, Dust transport models, Polvo del desierto, desert dust, lidar measurements, Dust concentration, Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica, performance, :Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica [Àrees temàtiques de la UPC]
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