Fig. 1.
(A and B) A representative time series (A) and corresponding IS INP temperature spectra (B) from the Pioneer Wildfire (22 August 2016). In the time series, INP concentration at −30 °C ([INP]−30 °C), the number of particles with diameters 500 nm (n500), rBC number concentrations from the single-particle soot photometer (SP2), and total particle number concentrations from a condensation particle counter (CPC) are shown as 1-Hz data (sticks) and 3- to 5-min averages (markers). For [INP]−30 °C and n500, open and solid markers represent times when the SP2 was laser on and off, respectively. The IS INP temperature spectra are from the same day (MST times in the bottom left-hand corner) and show the effect of pretreatments with heat, peroxide, and size exclusion of particles 0.1 m.