Applicability of semiconductor methane sensors to measurements of the methane emission from water body surface
A.D. Mershavka1,2, I.A. Repina2,3,4, R.D. Makarov1, E.A. Denisov1, V.M. Ivakhov5, A.D. Lykov6
1Moscow Institute of Physics and Technology (National Research University), Dolgoprudnyiy, Russia
2A.M. Obukhov Institute of Atmospheric Physics Russian Academy of Sciences, Moscow, Russia
3Lomonosov Moscow State University, Moscow, Russia
4Federal State Educational Institution of Higher Professional Education "Ugra State University", Hanty-Mansijsk, Russia
5The Voeikov Main Geophysical Observatory, St Petersburg, Russia
6Central Aerological Observatory, Dolgoprudnyiy, Russia
Keywords: methane, methane emission, water surface, semiconductor sensor, chamber method
Abstract
The applicability of semiconductor methane sensors, designed to detect explosive concentrations of gas in rooms, to the study of background concentrations of methane in the atmosphere and its emissions from the water body surface is studied. An experimental prototype of the methane sensor is designed, for which, in order to increase the accuracy of determining the methane content in air, a calibration plan is suggested, which takes into account the humidity, temperature, and pressure of the environment. Laboratory and field experiments show that the TGS series sensors are capable of detecting methane concentration changes from 0.1 ppm and higher and can be mounted in floating chambers used to determine methane emissions from the water surface. An experimental setup is described. The results of calibration and selection of the best parametric model are presented. Recommendations for further development of the device are given.
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