Effect of corrections for water vapor sensitivity of coumarin targets and for density fluctuations (WPL) on O3 fluxes measured with the eddy covariance technique

Ozone vertical fluxes above land surfaces are commonly measured with the eddy covariance (EC) technique which requires non-conventional ozone fast analyzer mostly based on a chemiluminescence reaction of reagent, either gaseous or solid. Currently, most adopted reagent for this kind O3 analyzers is coumarin-47 solid dye absorbed silica gel targets. However, ozone-induced enhanced by presence water vapor in air sample. The aim paper to evaluate magnitude corrections flux measurements due sensitivity fluctuations, performed forest ecosystem from 2013 2020, and combined effect WPL correction (Webb–Pearman–Leuning correction), another well-established density fluctuations related sensible heat fluxes. Results confirm that between quite small negligible environmental conditions. On contrary, almost one order greater than former correction. combination two results, average, 6.6% reduction absolute value uncorrected Since can be remarkable depending seasonal period measurements, both recommended, as well indication their application published works.