Relevance and impact
This project will strongly contribute to the understanding of the hygroscopic effect on aerosol properties. The project exploits one of the largest data sets of simultaneous aerosol and humidity profiles that will allow a thorough statistical analysis based on a long-term time series and a robust determination of hygroscopic properties for a variety of particles never done so far. In particular, we will derive the enhancement factor for optical properties such as backscatter and extinction and microphysical properties as volume concentration which are very important parameters to characterize the direct and indirect effect of aerosols. As opposed to in-situ methods the lidar technique is non-invasive and allows studying the aerosols in their original environment. The importance for the climate system is evident from the IPCC-5 report (IPCC, 2013), where the indirect and the direct effect of aerosols make the two largest contributions to the total uncertainty of the radiative forcing. In this sense, this study will contribute to reduce the uncertainties in the direct and indirect aerosol effect on radiative budget by means of a better understanding of aerosol hygroscopic processes. Modelers will also benefit of the results derived from the project, since a better characterization of hygroscopic properties for different kind of particles will be included in the models improving the climate predictions.
- Paul Scherrer Institute (Switzerland)
- University of Granada (Spain)
- EMPA (Switzerland)
- University of Applied Sciences Northwestern Switzerland FHNW (Switzerland)
- ETH Zurich (Swiss Federal Institute of Technology in Zurich, Switzerland)
Bedoya-Velásquez, A. E., F. Navas-Guzmán, M. J. Granados-Muñoz, G. Titos, R. Roman, J. A. Casquero-Vera, P. Ortiz-Amezcua, J. A. Benavent-Oltra, G. de Arruda Moreira, E. Montilla-Rosero, C. D. Hoyos Ortiz, B. Artiñano, E. Coz, L. Alados-Arboledas and J. L. Guerrero-Rascado: Hygroscopic growth study in the framework of EARLINET during the SLOPE I campaign: synergy of remote sensing and in-situ instrumentation, Atmos. Chem. Phys.,18, 7001-7017, https://doi.org/10.5194/acp-18-7001-2018, 2018.
Brunamonti, S., Martucci, G., Romanens, G., Poltera, Y., Wienhold, F. G., Haefele, A., and Navas-Guzmán, F.: Validation of aerosol backscatter profiles from Raman lidar and ceilometer using balloon-borne measurements, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-294, in review, 2020.
Martucci, G., Navas-Guzmán, F., Renaud, L., Romanens, G., Gamage, S. M., Hervo, M., Jeannet, P., and Haefele, A.: Validation of temperature data from the RAman Lidar for Meteorological Observations (RALMO) at Payerne. An application to liquid cloud supersaturation, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2020-289, in review, 2020.
Navas-Guzmán, F., Martucci, G., Collaud Coen, M., Granados-Muñoz, M. J., Hervo, M., Sicard, M., and Haefele, A.: Characterization of aerosol hygroscopicity using Raman lidar measurements at the EARLINET station of Payerne, Atmos. Chem. Phys., 19, 11651–11668, https://doi.org/10.5194/acp-19-11651-2019, 2019.