Table 1 Average measured concentrations and standard deviations of ethanol in air over 24 h for the dates shown compared with concentrations calculated from rainwater event sample concentrations using Henry’s Law during the month of July in each year in ppbv

From: Rapidly increasing ethanol concentrations in rainwater and air

  n Average, ppbv Method
2011
July 5 air 12 0.78 ± 0.33 Measured
July rain 7 1.17 ± 0.81 Calculated
2016
July 25 air 22 3.91 ± 2.58 Measured
July rain 6 5.10 ± 0.57 Calculated
  1. n number of samples. Measured and calculated air concentrations are the same for each year (t test, p > 0.1); however, they are significantly different between 2011 and 2016 (t test, p < 0.001).