ACP - recent papers

1. The Paris low-level jet during PANAME 2022 and its impact on the summertime urban heat island
   The Paris low-level jet during PANAME 2022 and its impact on the summertime urban heat island Jonnathan Céspedes, Simone Kotthaus, Jana Preissler, Clément Toupoint, Ludovic Thobois, Marc-Antoine Drouin, Jean-Charles Dupont, Aurélien Faucheux, and Martial Haeffelin Atmos. Chem. Phys., 24, 11477–11496, https://doi.org10.5194/acp-24-11477-2024, 2024 The low-level jet (LLJ) is common in Paris during summer. The LLJ core height and speed significantly influence vertical mixing in the urban boundary layer, which affects air temperature variations between the urban canopy layer and surrounding rural areas, determining the urban heat island (UHI) intensity. This study highlights the importance of wind profile observations for understanding urban boundary layer dynamics and near-surface atmospheric conditions relevant to health.
2. Dust aerosol from the Aralkum Desert influences the radiation budget and atmospheric dynamics of Central Asia
   Dust aerosol from the Aralkum Desert influences the radiation budget and atmospheric dynamics of Central Asia Jamie R. Banks, Bernd Heinold, and Kerstin Schepanski Atmos. Chem. Phys., 24, 11451–11475, https://doi.org10.5194/acp-24-11451-2024, 2024 The Aralkum is a new desert in Central Asia formed by the desiccation of the Aral Sea. This has created a source of atmospheric dust, with implications for the balance of solar and thermal radiation. Simulating these effects using a dust transport model, we find that Aralkum dust adds radiative cooling effects to the surface and atmosphere on average but also adds heating events. Increases in surface pressure due to Aralkum dust strengthen the Siberian High and weaken the summer Asian heat low.
3. Long-term (2010–2021) lidar observations of stratospheric aerosols in Wuhan, China
   Long-term (2010–2021) lidar observations of stratospheric aerosols in Wuhan, China Yun He, Dongzhe Jing, Zhenping Yin, Kevin Ohneiser, and Fan Yi Atmos. Chem. Phys., 24, 11431–11450, https://doi.org10.5194/acp-24-11431-2024, 2024 We present a long-term ground-based lidar observation of stratospheric aerosols at a mid-latitude site, Wuhan, in central China, from 2010 to 2021. We observed a stratospheric background period from 2013 to mid-2017, along with several perturbations from volcanic aerosols and wildfire-induced smoke. In summer, injected stratospheric aerosols are found to be captured by the Asian monsoon anticyclone, resulting in prolonged residence and regional transport in the mid-latitudes of East Asia.
4. Rate coefficients for the reactions of OH radicals with C3–C11 alkanes determined by the relative-rate technique
   Rate coefficients for the reactions of OH radicals with C3–C11 alkanes determined by the relative-rate technique Yanyan Xin, Chengtang Liu, Xiaoxiu Lun, Shuyang Xie, Junfeng Liu, and Yujing Mu Atmos. Chem. Phys., 24, 11409–11429, https://doi.org10.5194/acp-24-11409-2024, 2024 Rate coefficients for the reactions of OH radicals with C3–C11 alkanes were determined using the multivariate relative-rate technique. A total of 25 relative-rate coefficients at room temperature and 24 Arrhenius expressions in the temperature range of 273–323 K were obtained, which expanded the data available.
5. Global modeling of aerosol nucleation with a semi-explicit chemical mechanism for highly oxygenated organic molecules (HOMs)
   Global modeling of aerosol nucleation with a semi-explicit chemical mechanism for highly oxygenated organic molecules (HOMs) Xinyue Shao, Minghuai Wang, Xinyi Dong, Yaman Liu, Wenxiang Shen, Stephen R. Arnold, Leighton A. Regayre, Meinrat O. Andreae, Mira L. Pöhlker, Duseong S. Jo, Man Yue, and Ken S. Carslaw Atmos. Chem. Phys., 24, 11365–11389, https://doi.org10.5194/acp-24-11365-2024, 2024 Highly oxygenated organic molecules (HOMs) play an important role in atmospheric new particle formation (NPF). By semi-explicitly coupling the chemical mechanism of HOMs and a comprehensive nucleation scheme in a global climate model, the updated model shows better agreement with measurements of nucleation rate, growth rate, and NPF event frequency. Our results reveal that HOM-driven NPF leads to a considerable increase in particle and cloud condensation nuclei burden globally.