TCAP 1 Particle-into-liquid-sampler Aircraft Data

Thomas Watson Brookhaven National Laboratory

Category: Aerosol Properties

The Particle-into-Liquid Sampler (PILS)-Ion Chromatography (IC) instrument is an aqueous solution-based technique for determining bulk chemical composition of ambient aerosol particles. The size ranges measured range from approximately 70 nm to 2.5μm in diameter. The chemical species measured are:

  • Li+, Na+, NH-4+, Mg2+, K+, Ca2+
  • Cl-, Br-, NO3-, H2PO43-, SO42-, C2O42-

The data from the PILS are essential to calibrate the aerosol chemical speciation monitor (ACSM) in the Mobile Aerosol Observing System Aerosol module (MAOS-A) and the aerosol mass spectrometer (AMS) on the G-1.

PILS data were collected on 10 flights of the DOE G-1 during the Two-Column Aerosol Project (TCAP) from July 9 through July 25, 2012. The total mass data from the PILS have been correlated with the data from the three-color nephelometer and delay times for the PILS determined. The delays were consistent between all 10 flights and were 324 seconds with a standard deviation of the mean of 1 second. A time series of ions, the mass distribution of ions, and the correlation of ion pairs will be presented for selected flights, and comparisons with other instruments making aerosol mass measurements will be made. A comparison with the aircraft data and the PILS measurements made at the MAOS ground site will also be presented, as will correlation of ions measured at the ground site with wind direction.

This poster will be displayed at ASR Science Team Meeting.

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