Contact:
PI Ð Alex Huffman (alex.huffman@du.edu)
Graduate student Ð Alex Volkova (alex.volkova@du.edu)



WIBS data was collected from April 7th through April 29th 2022 at the Southern Great Plains ARM facility in Oklahoma, USA. Time recorded in UTC.

Data was analyzed using the Igor Pro (wavemetrics) WIBS toolkit from Droplet Measurement Technologies. Time averaging was done over 5 min increments with a lower size cutoff of 0.8 µm. 

The WIBS is a single particle fluorescence instrument that uses a diode laser, 2 Xenon flash lamp (280 and 370 nm) and three fluorescent channels (FL1, FL2, FL3) to measure whether a particle is fluorescent or not. Fluorescence in this case is defined as a signal detected in any channel or combination of channels that is higher than the forced trigger value + 3 sigma. The Perring classification style is used to characterize the different combinations of fluorescence: A Ð FL1 only, B Ð FL2 only, C Ð FL3 only, AB Ð in both FL1 and FL2, AC in both FL1 and FL3, BC Ð in both FL2 and FL3, ABC Ð in FL1, FL2 and FL3, or nonfluorescent. The csv file ÒAGINSGP_WIBS_All_Cat_Time_SeriesÓ has the data for all possible combinations while the file ÒAGINSGP_WIBS_Simplified_Time_SeriesÓ has data grouped into whether there was any fluorescence detected in the 3 individual channels.