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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
  • The influence of climate variability on transatlantic flight times
    The influence of climate variability on transatlantic flight times Corwin J. Wright, Phoebe E. Noble, Timothy P. Banyard, Sarah J. Freeman, and Paul D. Williams Atmos. Chem. Phys., 25, 18267–18290, https://doi.org/10.5194/acp-25-18267-2025, 2025 We use measured transatlantic flight times since 1994 from the IAGOS (In-Service Aircraft for a GlobalObserving System) program to assess the impact of the North Atlantic Oscillation, El Nino-Southern Oscillation, Quasi-Biennial Oscillation and solar cycle. We show that they drive changes to one-way flight times of over an hour and to round-trip flight times by several minutes per flight. They thus cause variability in total CO2 emissions of 10s of kT/month and financial cost of millions of US dollars/month over the full transatlantic fleet.

  • Marine aerosol distributions from shipborne observations over the South China Sea: diurnal variation characteristics and their controlling factors
    Marine aerosol distributions from shipborne observations over the South China Sea: diurnal variation characteristics and their controlling factors Zhi Qiao, Shengcheng Cui, Huiqiang Xu, Xiaoqing Wu, Xiaodan Liu, Zihan Zhang, Mengying Zhai, Yue Pan, Tao Luo, and Xuebin Li Atmos. Chem. Phys., 25, 18227–18247, https://doi.org/10.5194/acp-25-18227-2025, 2025 We gave first insight into the diel characteristics of the marine aerosol, especially during the day night transition period, to better understand which and how meteorological elements affect the marine aerosol. Overall, wind speeds and sea surface temperature indeed play critical roles in the regulation of aerosol production and diffusion processes, while the sea–air temperature difference is found to be the most vital factor related to the variations of marine aerosol distributions.

  • Ammonia exchange flux over a tropical dry deciduous forest in the dry season in Thailand
    Ammonia exchange flux over a tropical dry deciduous forest in the dry season in Thailand Mao Xu, Phuvasa Chanonmuang, Hiroyuki Sase, Atsuyuki Sorimachi, Syuichi Itahashi, and Kazuhide Matsuda Atmos. Chem. Phys., 25, 18291–18312, https://doi.org/10.5194/acp-25-18291-2025, 2025 We first observed the exchange flux of ammonia over a tropical forest in Thailand. Measurements were taken during two periods in the dry season with different environmental conditions. This data improves our understanding of how ammonia behaves in forests under tropical climates and helps refine models that estimate nitrogen deposition and assess its impact across East Asia.

  • Volume uptake of carbonyls during diffusional ice crystal growth
    Volume uptake of carbonyls during diffusional ice crystal growth Jackson Seymore, Miklós Szakáll, Alexander Theis, Subir K. Mitra, Christine Borchers, and Thorsten Hoffmann Atmos. Chem. Phys., 25, 18249–18265, https://doi.org/10.5194/acp-25-18249-2025, 2025 Laboratory studies examined carbonyl deposition into ice crystals using a flowtube setup. Ice crystals were grown under conditions that mimic cirrus clouds in the presence of carbonyl vapors. Ice and gas samples were collected and analyzed to calculate ice uptake coefficients for 14 carbonyls at different temperatures. This revealed an inverse relationship between uptake and temperature. Vapor pressure and molar mass were found to be the most significant factors in uptake.

  • Observations of stratospheric streamers and frozen-in anticyclones in aerosol extinction
    Observations of stratospheric streamers and frozen-in anticyclones in aerosol extinction Christian Löns, Ronald Eixmann, Christine Pohl, Alexei Rozanov, and Christian von Savigny Atmos. Chem. Phys., 25, 18209–18225, https://doi.org/10.5194/acp-25-18209-2025, 2025 During the polar vortex season, so-called streamers can transport tropical air towards the pole in the middle stratosphere. This tropical air can get trapped in high-pressure areas at high latitudes after the polar vortex breaks down. In this study, remote sensing instruments are used to observe the course of such streamers by measuring the scattered solar radiation. Aerosols get transported to high latitudes at an altitude of about 25–35 km, increasing the aerosol mass there significantly.