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ACP - recent papers

Combined list of the recent articles of the journal Atmospheric Chemistry and Physics and the recent discussion forum Atmospheric Chemistry and Physics Discussions
  • Migrating diurnal tide anomalies during QBO disruptions in 2016 and 2020: morphology and mechanism
    Migrating diurnal tide anomalies during QBO disruptions in 2016 and 2020: morphology and mechanism Shuai Liu, Guoying Jiang, Bingxian Luo, Xiao Liu, Jiyao Xu, Yajun Zhu, and Wen Yi Atmos. Chem. Phys., 25, 17725–17746, https://doi.org/10.5194/acp-25-17725-2025, 2025 Disruptions of the Quasi-Biennial Oscillation modulate the migrating diurnal tide in the mesosphere and lower thermosphere. During the events, wavelengths and phases of the tide remain unchanged, but its amplitude strengthens. The variation of heating sources, dissipation, zonal wind latitude shear and gravity wave drag may contribute to the amplification of the tide amplitude. These features provide insight into the dynamical coupling of troposphere, stratosphere, mesosphere and lower thermosphere.

  • How meteorological conditions influence aerosol-cloud interactions under different pollution regimes
    How meteorological conditions influence aerosol-cloud interactions under different pollution regimes Jianqi Zhao, Xiaoyan Ma, Johannes Quaas, and Tong Yang Atmos. Chem. Phys., 25, 17701–17723, https://doi.org/10.5194/acp-25-17701-2025, 2025 We use the chemistry version of the Weather Research and Forecasting model coupled with spectral bin microphysics to investigate how meteorological conditions impact aerosol–cloud interactions (ACI) under different pollution regimes. Our findings highlight the changes in aerosol effects on clouds and precipitation under varying thermodynamic conditions, as well as the sensitivity of ACI to meteorological conditions under different pollution regimes, which help to clarify the mechanisms behind the nonlinear variation of ACI with environmental conditions.

  • Emission characteristics of greenhouse gases and air pollutants in a Qinghai-Tibetan Plateau city using a portable Fourier transform spectrometer and TROPOMI observations
    Emission characteristics of greenhouse gases and air pollutants in a Qinghai-Tibetan Plateau city using a portable Fourier transform spectrometer and TROPOMI observations Qiansi Tu, Frank Hase, Ying Zhang, Jiaxin Fang, Yanwu Jiang, Xiaofan Li, Matthias Schneider, Zhuolin Yang, Xin Zhang, and Zhengqiang Li Atmos. Chem. Phys., 25, 17779–17796, https://doi.org/10.5194/acp-25-17779-2025, 2025 Understanding greenhouse gas and air pollutant concentrations and emissions characteristics in the Qinghai-Tibetan Plateau cities remains limited. We present the first CO2, CH4 and CO abundances using a portal Fourier-transform infrared (FTIR) spectrometer in Xining. Ground-based data exceeded satellite/model estimates, indicating higher local emissions. Strong CO discrepancies and ∆XCO–∆XCO2 correlation under easterly winds highlight the value of portable FTIR for urban emission studies.

  • Impact of leakage during HFC-125 production on the increase in HCFC-123 and HCFC-124 emissions
    Impact of leakage during HFC-125 production on the increase in HCFC-123 and HCFC-124 emissions Luke M. Western, Stephen Bourguet, Molly Crotwell, Lei Hu, Paul B. Krummel, Hélène De Longueville, Alistair J. Manning, Jens Mühle, Dominique Rust, Isaac Vimont, Martin K. Vollmer, Minde An, Jgor Arduini, Andreas Engel, Paul J. Fraser, Anita L. Ganesan, Christina M. Harth, Chris Lunder, Michela Maione, Stephen A. Montzka, David Nance, Simon O'Doherty, Sunyoung Park, Stefan Reimann, Peter K. Salameh, Roland Schmidt, Kieran M. Stanley, Thomas Wagenhäuser, Dickon Young, Matt Rigby, Ronald G. Prinn, and Ray F. Weiss Atmos. Chem. Phys., 25, 17761–17778, https://doi.org/10.5194/acp-25-17761-2025, 2025 We used atmospheric measurements to estimate emissions of two hydrochlorofluorocarbon (HCFC) gases, called HCFC-123 and HCFC-124, that harm the ozone layer. Despite international regulation to stop their production, their emissions have not fallen. This may be linked to how they are used to make other chemicals. Our findings show that some banned substances are still reaching the atmosphere, likely through leaks during chemical production, which could slow the recovery of the ozone layer.

  • New insights in atmospheric methane variability in the Arctic by ship-borne measurements during MOSAiC
    New insights in atmospheric methane variability in the Arctic by ship-borne measurements during MOSAiC Amanda Sellmaier, Ellen Damm, Torsten Sachs, Benjamin Kirbus, Inge Wiekenkamp, Annette Rinke, Falk Pätzold, Daiki Nomura, Astrid Lampert, and Markus Rex Atmos. Chem. Phys., 25, 17685–17700, https://doi.org/10.5194/acp-25-17685-2025, 2025 This study presents continuous ship-borne measurements of methane (CH4) concentration and isotopic composition monitored during an ice drift expedition in 2020. Using trajectory analysis, we linked atmospheric CH4 variabilities to air mass pathways transported over open water or sea-ice. The study highlights the potential of ship-borne observations to fill significant data gaps in the high Arctic.