ACP - recent papers

1. Feasibility of robust estimates of ozone production rates using a synergy of satellite observations, ground-based remote sensing, and models
   Feasibility of robust estimates of ozone production rates using a synergy of satellite observations, ground-based remote sensing, and models Amir H. Souri, Gonzalo González Abad, Glenn M. Wolfe, Tijl Verhoelst, Corinne Vigouroux, Gaia Pinardi, Steven Compernolle, Bavo Langerock, Bryan N. Duncan, and Matthew S. Johnson Atmos. Chem. Phys., 25, 2061–2086, https://doi.org10.5194/acp-25-2061-2025, 2025 We establish a simple yet robust relationship between ozone production rates and geophysical parameters obtained from several intensive atmospheric composition campaigns. We show that satellite remote sensing data can effectively constrain these parameters, enabling us to produce the first global maps of ozone production rates with unprecedented resolution.
2. Evaluating present-day and future impacts of agricultural ammonia emissions on atmospheric chemistry and climate
   Evaluating present-day and future impacts of agricultural ammonia emissions on atmospheric chemistry and climate Maureen Beaudor, Didier Hauglustaine, Juliette Lathière, Martin Van Damme, Lieven Clarisse, and Nicolas Vuichard Atmos. Chem. Phys., 25, 2017–2046, https://doi.org10.5194/acp-25-2017-2025, 2025 Agriculture is the biggest ammonia (NH3) source, impacting air quality, climate, and ecosystems. Because of food demand, NH3 emissions are projected to rise by 2100. Using a global model, we analyzed the impact of present and future NH3 emissions generated from a land model. Our results show improved ammonia patterns compared to a reference inventory. Future scenarios predict up to 70 % increase in global NH3 burden, with significant changes in radiative forcing that can greatly elevate N2O.
3. Impact of SO2 injection profiles on simulated volcanic forcing for the 2009 Sarychev eruptions – investigating the importance of using high-vertical-resolution methods when compiling SO2 data
   Impact of SO2 injection profiles on simulated volcanic forcing for the 2009 Sarychev eruptions – investigating the importance of using high-vertical-resolution methods when compiling SO2 data Emma Axebrink, Moa K. Sporre, and Johan Friberg Atmos. Chem. Phys., 25, 2047–2059, https://doi.org10.5194/acp-25-2047-2025, 2025 We investigate the importance of using high-vertical-resolution (HR) SO2 data when simulating volcanic eruptions' impact on the stratospheric aerosol load and climate, using WACCM, and compare simulations with aerosol observations from CALIOP. Simulations with HR SO2 data match the observations well, whereas simulations with the model's default low-resolution (LR) data underestimate the aerosol load by ~ 50 %. The resulting climate cooling is twice as high for the HR than the LR SO2 data.
4. Diurnal, seasonal, and interannual variations in δ(18O) of atmospheric O2 and its application to evaluate natural and anthropogenic changes in oxygen, carbon, and water cycles
   Diurnal, seasonal, and interannual variations in δ(18O) of atmospheric O2 and its application to evaluate natural and anthropogenic changes in oxygen, carbon, and water cycles Shigeyuki Ishidoya, Satoshi Sugawara, and Atsushi Okazaki Atmos. Chem. Phys., 25, 1965–1987, https://doi.org10.5194/acp-25-1965-2025, 2025 The 18O/16O ratio of atmospheric oxygen, δatm(18O), is higher than that of ocean water due to isotopic effects during biospheric activities. This is known as the Dole–Morita effect, and its millennial-scale variations are recorded in ice cores. However, small variations of δatm(18O) in the present day have never been detected so far. This paper presents the first observations of diurnal, seasonal, and secular variations in δatm(18O) and applies them to evaluate oxygen, carbon, and water cycles.
5. Airborne in situ quantification of methane emissions from oil and gas production in Romania
   Airborne in situ quantification of methane emissions from oil and gas production in Romania Hossein Maazallahi, Foteini Stavropoulou, Samuel Jonson Sutanto, Michael Steiner, Dominik Brunner, Mariano Mertens, Patrick Jöckel, Antoon Visschedijk, Hugo Denier van der Gon, Stijn Dellaert, Nataly Velandia Salinas, Stefan Schwietzke, Daniel Zavala-Araiza, Sorin Ghemulet, Alexandru Pana, Magdalena Ardelean, Marius Corbu, Andreea Calcan, Stephen A. Conley, Mackenzie L. Smith, and Thomas Röckmann Atmos. Chem. Phys., 25, 1497–1511, https://doi.org10.5194/acp-25-1497-2025, 2025 This article presents insights from airborne in situ measurements collected during the ROmanian Methane Emissions from Oil and gas (ROMEO) campaign supported by two models. Results reveal Romania's oil and gas methane emissions were significantly under-reported to the United Nations Framework Convention on Climate Change (UNFCCC) in 2019. A large underestimation was also found in the Emissions Database for Global Atmospheric Research (EDGAR) v7.0 for the study domain in the same year.