Data dictionary for data files associated with "Measuring short-chain per- and polyfluoroalkyl substances in Central New Jersey air using chemical ionization mass spectrometry."

For questions or inquiries relating to these data please contact James Mattila (Mattila.James@epa.gov).

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File: "CIMSData.txt"

Overview: Time series data of relevant analytes detected by the chemical ionization mass spectrometer (CIMS). These data are used in Figures 2 and 4 of manuscript draft, and in the generation of diel profile plots in Figure 3 of manuscript draft.

'C5H10IO3-' are data for C5H10O3, in units of arbitrary signal.
'C2F3HIO2-' are data for trifluoroacetic acid (TFA), in units of parts per trillion by volume (pptv).
'C2F3HIO2-_LODremoved' are data for TFA above instrumental limits of detection, in units of pptv.
'C3F6H2IO-' are data for C3H2F6O, in units of estimated pptv.
'C6F11HIO3-' are data for C6HF11O3, in units of estimated pptv.
LocalTime are data for local date and time, in units of seconds since 01 January 1904.

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File: "DielPlotData.txt"

Overview: Data used in diel profile plots in Figure 3 of manuscript draft.

HourBins are data for hour of day (local time).
TFABins are binned TFA data in units of pptv.
TFABinsErr are uncertainty data associated with binned TFA data in units of pptv.
HFIPBins are binned C3H2F6O data in units of estimated pptv.
HFIPBinsErr are uncertainty data associated with binned C3H2F6O data in units of estimated pptv.
TempBinsC are binned temperature data in units of degrees Celcius.
TempBinsCErr are uncertainty data associated with binned temperature data in units of degrees Celcius.
ISOPOOHBins are binned C5H10O3 data in units of relative signal.
ISOPOOHBinsErr are uncertainty data associated with binned C5H10O3 data in units of relative signal.

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File: "MetData.txt"

Overview: Meterological data used Figure 4 of manuscript draft, and in generation of diel profile plots in Figure 3 of manuscript draft.

DateTimeW are data for local date and time, in units of seconds since 01 January 1904.
AirTemp_degF_10m are data for air temperature, in units of degrees Farenheit.
Wind_dir_corr_Avg are data for wind direction, in units of degrees with 0˚ representing northerly winds, 90˚ representing easterly winds, 180˚ representing southerly winds, and 270˚ representing westerly winds.
Wind_Spd_mps_Avg are data for wind speed, in units of meters per second.