High Concentrations of Nanoparticles From Isoprene Nitrates Predicted in Convective Outflow Over the Amazon
Uloženo v:
| Název: | High Concentrations of Nanoparticles From Isoprene Nitrates Predicted in Convective Outflow Over the Amazon |
|---|---|
| Autoři: | Bardakov, R., Thornton, J. A., Ekman, A. M. L., Krejci, R., Pöhlker, M. L., Curtius, J., Williams, J., Lelieveld, J., Riipinen, I. |
| Zdroj: | Geophysical Research Letters, Vol 51, Iss 23, Pp n/a-n/a (2024) Geophysical Research Letters |
| Informace o vydavateli: | American Geophysical Union (AGU), 2024. |
| Rok vydání: | 2024 |
| Témata: | 0301 basic medicine, 0303 health sciences, 03 medical and health sciences, Meteorology and Atmospheric Sciences, new particle formation, QC801-809, Geophysics. Cosmic physics, monoterpenes, Meteorologi och atmosfärsvetenskap, isoprene, deep convection |
| Popis: | The biogenic volatile organic compounds isoprene and α‐pinene are abundant over the Amazon and can be efficiently transported to the upper troposphere by deep convective clouds (DCC). We simulate their transport and chemistry following DCC updrafts and upper tropospheric outflow using a multi‐phase chemistry model with aerosol microphysics constrained by recent field measurements. In the lightning‐ and NO‐rich early morning outflow, organonitrates dominate the predicted ultra‐ and extremely‐low‐volatility organic compounds (ULVOCs+) derived from isoprene and α‐pinene. Nucleation of particles by α‐pinene‐derived ULVOCs+ alone, with an associated formation rate of 1.7 nm molecular clusters of 0.0006 s−1 cm−3 and resulting maximum particle number concentration of 19 cm−3, is not sufficient to explain ultrafine aerosol abundances observed in Amazonian DCC outflow. When isoprene‐derived ULVOCs+ are allowed to contribute to nucleation, the new particle formation rate increases by six orders of magnitude, and the predicted number concentrations reach 104 cm−3, consistent with observations. |
| Druh dokumentu: | Article |
| Popis souboru: | application/pdf |
| Jazyk: | English |
| ISSN: | 1944-8007 0094-8276 |
| DOI: | 10.1029/2024gl109919 |
| Přístupová URL adresa: | https://doaj.org/article/50de2b6c576048208be7d8138ae40b68 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-238736 |
| Rights: | CC BY |
| Přístupové číslo: | edsair.doi.dedup.....a3c0f75fc9e06b6988459f984d0c2794 |
| Databáze: | OpenAIRE |
Full Text Finder 
Nájsť tento článok vo Web of Science | Abstrakt: | The biogenic volatile organic compounds isoprene and α‐pinene are abundant over the Amazon and can be efficiently transported to the upper troposphere by deep convective clouds (DCC). We simulate their transport and chemistry following DCC updrafts and upper tropospheric outflow using a multi‐phase chemistry model with aerosol microphysics constrained by recent field measurements. In the lightning‐ and NO‐rich early morning outflow, organonitrates dominate the predicted ultra‐ and extremely‐low‐volatility organic compounds (ULVOCs+) derived from isoprene and α‐pinene. Nucleation of particles by α‐pinene‐derived ULVOCs+ alone, with an associated formation rate of 1.7 nm molecular clusters of 0.0006 s−1 cm−3 and resulting maximum particle number concentration of 19 cm−3, is not sufficient to explain ultrafine aerosol abundances observed in Amazonian DCC outflow. When isoprene‐derived ULVOCs+ are allowed to contribute to nucleation, the new particle formation rate increases by six orders of magnitude, and the predicted number concentrations reach 104 cm−3, consistent with observations. |
|---|---|
| ISSN: | 19448007 00948276 |
| DOI: | 10.1029/2024gl109919 |