A High-Precision Mid-Infrared Spectrometer for Ambient HNO3 Measurements

Autor: Nicolas Sobanski, Béla Tuzson, Philipp Scheidegger, Herbert Looser, Christoph Hüglin, Lukas Emmenegger

Publikováno v: Sensors, Vol 22, Iss 23, p 9158 (2022)

Precise and accurate measurements of ambient HNO3 are crucial for understanding various atmospheric processes, but its ultra-low trace amounts and the high polarity of HNO3 have strongly hindered routine, widespread, direct measurements of HNO3 and r

Externí odkaz: https://doaj.org/article/368acd6f51514f90abaf6b30d018a1cd

Reactive nitrogen around the Arabian Peninsula and in the Mediterranean Sea during the 2017 AQABA ship campaign

Autor: Nijing Wang, James Brooks, Jan Schuladen, Jonathan Williams, Hang Su, Bettina Hottmann, Ivan Tadic, Horst Fischer, Justin Shenolikar, Jos Lelieveld, Nicolas Sobanski, Yafang Cheng, Hartwig Harder, Sebastian Tauer, Dirk Dienhart, Guo Li, John Crowley, Roland Rohloff, Philipp Eger, Monica Martinez, Frank Drewnick, Eva Y. Pfannerstill, Nils Friedrich

Publikováno v: Atmospheric Chemistry and Physics, Vol 21, Pp 7473-7498 (2021)

We present shipborne measurements of NOx (≡ NO + NO2) and NOy (≡ NOx+ gas- and particle-phase organic and inorganic oxides of nitrogen) in summer 2017 as part of the expedition “Air Quality and climate change in the Arabian BAsin” (AQABA). Th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccd4c97ede04e9b791cc868770247c81
https://acp.copernicus.org/articles/21/7473/2021/acp-21-7473-2021.pdf

Alkyl nitrates in the boreal forest: formation via the NO3-, OH- and O3-induced oxidation of biogenic volatile organic compounds and ambient lifetimes

Autor: Liine Heikkinen, Qiaozhi Zha, Jonathan Liebmann, John Crowley, Jan Schuladen, Matthieu Riva, Jos Lelieveld, Jonathan Williams, Hannele Hakola, Nicolas Sobanski, Horst Fischer, Heidi Hellén, Einar Karu, Mikael Ehn

Publikováno v: Atmospheric Chemistry and Physics. 19:10391-10403

The formation of alkyl nitrates in various oxidation processes taking place throughout the diel cycle can represent an important sink of reactive nitrogen and mechanism for chain termination in atmospheric photo-oxidation cycles. The low-volatility a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::626a9ff233e1b1f2f6a32ab2bfa497e4
https://doi.org/10.5194/acp-19-10391-2019

Modelling the impact of gas-phase pyruvic acid on acetaldehyde and peroxy radical formation in the boreal forest

Autor: Nicolas Sobanski, Horst Fischer, Einar Karu, John Crowley, Philipp Eger, Jan Schuladen, Jonathan Williams, Ville Vakkari, Jos Lelieveld

Based on the first measurements of gas-phase pyruvic acid (CH3C(O)C(O)OH) in the boreal forest, we derive effective emission rates of pyruvic acid and compare them with monoterpene emission rates over the diel cycle. Using a data-constrained box-mode

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e4240d17466e2e2aebc3d23b541892b
https://acp.copernicus.org/preprints/acp-2020-975/

Pyruvic acid in the boreal forest: gas-phase mixing ratios and impact on radical chemistry

Autor: Mikael Ehn, John Crowley, Jan Schuladen, Jonathan Williams, Jos Lelieveld, Qiaozhi Zha, Nicolas Sobanski, Simon Schallhart, Horst Fischer, Lauriane L. J. Quéléver, Matthieu Riva, Philipp Eger, Einar Karu

Publikováno v: Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics, European Geosciences Union, 2020, 20 (6), pp.3697-3711. ⟨10.5194/acp-20-3697-2020⟩
Atmospheric Chemistry and Physics, Vol 20, Pp 3697-3711 (2020)

Pyruvic acid (CH3C(O)C(O)OH, 2-oxopropanoic acid) is an organic acid of biogenic origin that plays a crucial role in plant metabolism, is present in tropospheric air in both gas-phase and aerosol-phase, and is implicated in the formation of secondary

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aab2a477558d10155acd1bf4023e1633
https://www.atmos-chem-phys.net/20/3697/2020/