“…As a result, a number of real-time and commercial instruments including the Ultraviolet Aerodynamic Particle Sizer (UV-APS; TSI Inc., Shoreview, MN, USA) and the Waveband Integrated Bioaerosol Sensor (WIBS; Droplet Measurement Technologies, Longmont, CO, USA) are being commonly used in bioaerosol research communities (e.g., Agranovski et al, 2003;Bhangar et al, 2014;Brosseau et al, 2000;Foot et al, 2008;Huffman et al, 2010;Perring et al, 2015;Stanley et al, 2011;Toprak and Schnaiter, 2013). The main principle common to these techniques is the detection of intrinsic fluorescence from fluorophores such as amino acids, coenzymes, vitamins, and pigments that ubiquitously occur in aerosols of biological origin (e.g., Hill et al, 2009;Pan et al, 2010;Pöhlker et al, 2012Pöhlker et al, , 2013. These PBAP represent a diverse and dynamic subset of airborne particles, consisting of whole organisms like bacteria, viruses, archaea, algae, fungi, and related reproductive units (e.g., pollen, bacterial and fungal spores), as well as decaying biomass and fragments from plants or insects (e.g., Deepak and Vali, 1991;Després et al, 2012;Jaenicke, 2005;Madelin, 1994;Pöschl, 2005).…”