Laboratory and field studies of ice-nucleating particles from open-lot livestock facilities in Texas

• Published in: Atmospheric chemistry and physics 2021-09, Vol.21 (18), p.14215-14234
• Main Authors: Hiranuma, Naruki, Auvermann, Brent W, Belosi, Franco, Bush, Jack, Cory, Kimberly M, Georgakopoulos, Dimitrios G, Höhler, Kristina, Hou, Yidi, Lacher, Larissa, Saathoff, Harald, Santachiara, Gianni, Shen, Xiaoli, Steinke, Isabelle, Ullrich, Romy, Umo, Nsikanabasi S, Vepuri, Hemanth S. K, Vogel, Franziska, Möhler, Ottmar
• Format: Article
• Language: English
• Subjects: aerosol; Aerosol interaction; Aerosol particles; Aerosols; Agricultural management; Agriculture; Air pollution; Analysis; Atmospheric particulates; Biological properties; Buildings and facilities; Cattle; Chambers; Climate change; cloud; Clouds; Composition; Data acquisition; Dust; Dust filters; Dust storms; Field investigations; Freezing; GEOSCIENCES; Ice; Ice nucleation; Immersion; Laboratories; Livestock; Livestock industry; Manures; Nucleation; Particulate emissions; Particulate matter; Physical properties; Polls & surveys; Precipitation; Seasonal variation; Seasonal variations; Simulation; Spectrometry; Standard error; Submerging; Surveying; Suspended particulate matter
• ISSN: 1680-7324; 1680-7316; 1680-7324
• DOI: 10.5194/acp-21-14215-2021

In this work, an abundance of ice-nucleating particles (INPs) from livestock facilities was studied through laboratory measurements from cloud-simulation chamber experiments and field investigation in the Texas Panhandle. Surface materials from two livestock facilities, one in the Texas Panhandle and another from McGregor, Texas, were selected as dust proxies for laboratory analyses. These two samples possessed different chemical and biological properties. A combination of aerosol interaction and dynamics in the atmosphere (AIDA) measurements and offline ice spectrometry was used to assess the immersion freezing mode ice nucleation ability and efficiency of these proxy samples at temperatures above -29 .sup." C. A dynamic filter processing chamber was also used to complement the freezing efficiencies of submicron and supermicron particles collected from the AIDA chamber. For the field survey, periodic ambient particle sampling took place at four commercial livestock facilities from July 2017 to July 2019. INP concentrations of collected particles were measured using an offline freezing test system, and the data were acquired for temperatures between -5 and -25 .sup." C.