Wideband integrated bioaerosol sensor (WIBS) hyper-fluorescent particle number concentrations measured in the Swiss container during MOSAiC 2019/2020 ...

• Main Authors: Beck, Ivo, Moallemi, Alireza, Rolo, Margarida, Quéléver, Lauriane, Jokinen, Tuija, Laurila, Tiia, Schmale, Julia
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: aerosol; Arctic aerosol; fluorescent aerosols; MOSAiC_ATMOS; Event label; DATE/TIME; LATITUDE; LONGITUDE; Particle number, hyper-fluorescent; Wideband integrated bioaerosol sensor; PS122/1; PS122/2; PS122/3; PS122/4; PS122/5; Polarstern; Multidisciplinary drifting Observatory for the Study of Arctic Climate MOSAiC; Arctic
• Online Access: https://dx.doi.org/10.1594/pangaea.961123; https://doi.pangaea.de/10.1594/PANGAEA.961123

These datasets contain the total particle number concentrations of hyper-fluorescent particles of sizes 0.5 to 20 μm (optical diameter). The WIBS measures the size, asymmetry and fluorescence of particles with an optical diameter of 0.5 – 20 µm. Detected particles are excited by two UV flashlamps at wavelengths of 280 and 370 nm and their emitted fluorescence is measured by two photomultipliers with bandwidths of 310 - 400 nm, and 420 - 650 nm. The WIBS counts excited particles at a maximum frequency of 125 Hz, which corresponds to a maximum concentration of 2.5*104 particles/L with a sample flow of 0.3 L/min. Excited particles were classified as fluorescent if their fluorescent intensity exceeded the background intensity by three standard deviations (3σ) and as hyper-fluorescent if the fluorescent intensity exceeded the background intensity by 9σ. Excited particles with a lower fluorescent intensity were considered to be non-fluorescent. The background fluorescence was determined by measuring the ...