Atmosphere, Volume 17, Issue 2
2026 February - 110 articles
Cover Story: Atmospheric CH4 measurements were carried out from June 2023 to May 2024 at Liberti Observatory of CNR-IIA, in a semi-rural site near Rome. CH4 monthly mean concentrations showed maximum and minimum values in winter and summer, respectively, in line with the European trends. Clear CH4 diurnal cycles with daytime low and nighttime high values are mainly driven by atmospheric stability conditions and photochemistry. A cluster analysis of air mass trajectories showed that elevated CH4 concentrations were influenced by NE European contribution, except in winter, when the influence of NW European and local sources became more significant. Furthermore, level-3 XCH4 data from the satellite TROPOMI showed a CH4 columnar concentration increase from 2018 to 2024 in agreement with the global annual growth from the NOAA network in the same period. View this paper - Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
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