Heterogeneity of the spatial distribution of CO_2 and CH_4 concentrations in the atmospheric surface layer over West Siberia: October-November 2018

摘要

Here, we present the results of a mobile campaign undertaken in late October to early November of 2018 to survey heterogeneity of the spatial distribution of CO_2 and CH_4 concentrations across West Siberia using the Picarro G4301 mobile gas concentration analyzer. The measurements were carried out along the following routes Tomsk-Karasevoe- Tomsk and Tomsk-Omsk-Tobolsk-Noyabrsk-Tobolsk-Chelyabinsk-Omsk-Tomsk. The highest baseline level of carbon dioxide mixing ratio of 431.0±2.2 ppm was observed at the western route segments between Chelyabinsk and Kurgan, and the lowest ones at segments Tomsk - Karasevoye, Demyanskoe - Noyabrsk, and Tobolsk - Yalutorovsk, where average concentrations of CO_2 were 410.1±1.1 ppm, 410.7±1.6 ppm, and 411.5±1.5 ppm, respectively. Enhanced methane background (> 2000 ppb) was recorded in the oil and gas production areas, as well as in the vicinity of such large industrial centers as Kurgan and Chelyabinsk.