Variation in chemical composition and volatility of oxygenated organic aerosol in different rural, urban, and mountain environments
Huang, Wei; Wu, Cheng; Gao, Linyu
1; Gramlich, Yvette; Haslett, Sophie L.; Thornton, Joel; Lopez-Hilfiker, Felipe D.; Lee, Ben H.; Song, Junwei
1; Saathoff, Harald
1; Shen, Xiaoli 1; Ramisetty, Ramakrishna 1; Tripathi, Sachchida N.; Ganguly, Dilip; Jiang, Feng
1; Vallon, Magdalena 1; Schobesberger, Siegfried; Yli-Juuti, Taina; Mohr, Claudia
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)
1; Gramlich, Yvette; Haslett, Sophie L.; Thornton, Joel; Lopez-Hilfiker, Felipe D.; Lee, Ben H.; Song, Junwei
1; Saathoff, Harald
1; Shen, Xiaoli 1; Ramisetty, Ramakrishna 1; Tripathi, Sachchida N.; Ganguly, Dilip; Jiang, Feng
1; Vallon, Magdalena 1; Schobesberger, Siegfried; Yli-Juuti, Taina; Mohr, Claudia1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)
Abstract:
The apparent volatility of atmospheric organic aerosol (OA) particles is determined by their chemical composition and environmental conditions (e.g., ambient temperature). A quantitative, experimental assessment
of volatility and the respective importance of these two factors remains challenging, especially in ambient measurements. We present molecular composition and volatility of oxygenated OA (OOA) particles in different rural, urban, and mountain environments (including Chacaltaya, Bolivia; Alabama, US; Hyytiälä, Finland; Stuttgart and Karlsruhe, Germany; and Delhi, India) based on deployments of a filter inlet for gases and aerosols coupled to a high-resolution time-of-flight chemical ionization mass spectrometer (FIGAERO-CIMS). We find on
average larger carbon numbers (nC) and lower oxygen-to-carbon (O : C) ratios at the urban sites (nC: 9.8 ± 0.7;
O : C: 0.76 ± 0.03; average ±1 standard deviation) compared to the rural (nC: 8.8 ± 0.6; O : C: 0.80 ± 0.05) and mountain stations (nC: 8.1 ± 0.8; O : C: 0.91 ± 0.07), indicative of different emission sources and chemistry.
of volatility and the respective importance of these two factors remains challenging, especially in ambient measurements. We present molecular composition and volatility of oxygenated OA (OOA) particles in different rural, urban, and mountain environments (including Chacaltaya, Bolivia; Alabama, US; Hyytiälä, Finland; Stuttgart and Karlsruhe, Germany; and Delhi, India) based on deployments of a filter inlet for gases and aerosols coupled to a high-resolution time-of-flight chemical ionization mass spectrometer (FIGAERO-CIMS). We find on
average larger carbon numbers (nC) and lower oxygen-to-carbon (O : C) ratios at the urban sites (nC: 9.8 ± 0.7;
O : C: 0.76 ± 0.03; average ±1 standard deviation) compared to the rural (nC: 8.8 ± 0.6; O : C: 0.80 ± 0.05) and mountain stations (nC: 8.1 ± 0.8; O : C: 0.91 ± 0.07), indicative of different emission sources and chemistry.
| Zugehörige Institution(en) am KIT | Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO) |
| Publikationstyp | Zeitschriftenaufsatz |
| Publikationsjahr | 2024 |
| Sprache | Englisch |
| Identifikator | ISSN: 1680-7324 KITopen-ID: 1000170090 |
| Erschienen in | Atmospheric Chemistry and Physics |
| Verlag | European Geosciences Union (EGU) |
| Band | 24 |
| Heft | 4 |
| Seiten | 2607–2624 |
| Vorab online veröffentlicht am | 28.02.2024 |
| Nachgewiesen in | Scopus Dimensions Web of Science |