Detailed characterization of pollen concentrations and their transport is necessary for the prevention of human health effects (Belmonte et al., 2008), but knowledge of transport processes is scarce, monitored at ground level with Hirst type volumetric air samplers, which requires a lot of time and human resources. In recent years, novel techniques have been developed to enable automated pollen monitoring and reduce workload. Among them, the LIDAR (Light Detection And Ranging) technique has shown potential to investigate the vertical distribution of pollen both by depolarization ratio and by detecting fluorescence (Sicard et al., 2016). Recent developments have incorporated fluorescence channels into multi-wavelength Raman polarization lidar systems that allow simultaneous characterization of aerosol and pollen properties (Veselovskii et al., 2020).

In this project, we intend to improve the knowledge of the optical properties of pollen in the atmosphere over the CIEMAT site, located northwest of the metropolitan area of Madrid. The measurements started on June 2022 to study pollen-rich events using a newly updated multi-wavelength Raman polarization lidar system (Molero et al 2020).

Belmonte et al. (2008) Int. J. Biometeorol, 52, 675–687. DOI: 10.1007/s00484-008-0160-9 https://link.springer.com/article/10.1007/s00484-008-0160-9

Sicard et al. (2016) Atmos. Chem. Phys., 16, 6805–6821. DOI: 10.5194/acp-16-6805-2016 https://acp.copernicus.org/articles/16/6805/2016/acp-16-6805-2016.pdf

Veselovskii et al. (2020) Atmos. Meas. Tech., 13, 6691–6701. DOI: 10.5194/amt-13-6691-2020 https://amt.copernicus.org/articles/13/6691/2020/

Molero et al. (2020) Remote Sensing, 12 (24), 4072. DOI: 10.3390/rs12244072 https://www.mdpi.com/2072-4292/12/24/4072/htm