Nitric Oxide Emissions from Soils — Field and Laboratory Measurements with HORIBA’s APNA

Nitrogen Oxides (NOx) are climate relevant trace gases in the atmosphere and are involved in acidic precipitation as well as in ozone formation and destruction. NOx originates from natural processes like thunderstorms and especially soil microbial activity next to anthropogenic emissions (mainly combustion processes). The gases play a crucial role in soil-atmosphere feedback processes. Our research aims to investigate NOx-emissions from soils under different land use, geographical and meteorological conditions. Such emissions could be quantifi ed in both field and laboratory experiments with a closed static chamber in combination with HORIBA’s NOx-analyser APNA-360. The instrument showed its ability to reliably measure nitrogen oxide soil emissions.

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