Lecture Long-term and night-time aerosol optical depth measurements at Ny-Ålesund using sun and lunar precision filterradiometers Kouremeti, Natalia; Kazadzis, Stelios; Gröbner, Julian; Stebel, Kerstin; Hansen, Georg H.; Mazzola, Mauro; Wehrli, Christoph Publication details Event: ACTRIS Science Conference (Rennes, France) Date: May 13th 2024 – May 16th 2024