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- Title
First comprehensive modelling study on observed new particle formation at the SORPES station in Nanjing, China.
- Authors
Huang, X.; Zhou, L. X.; Ding, A. J.; Qi, X. M.; Nie, W.; Wang, M. H.; Chi, X. G.; Petaja, T.; Kerminen, V.-M.; Roldin, P.; Rusanen, A.; Kulmala, M.; Boy, M.
- Abstract
New particle formation (NPF) has been investigated intensively during the last two decades because of its influence on aerosol population and the possible contribution to cloud condensation nuclei. However, intensive measurements and modelling activities on this topic in urban metropolitans in China with frequently high pollution episodes are still very limited. This study provides results from a comprehensive modelling study on the occurrence of new particle formation events in the western part of the Yangtze River Delta region (YRD), China. The comprehensive modelling system, which combines regional chemical transport model WRF-Chem (the Weather Research and Forecasting model coupled with Chemistry) and the sectional box model MALTE-BOX (the model to predict new aerosol formation in the lower troposphere), was shown to be capable of simulating atmospheric nucleation and subsequent growth. Here we present a detailed discussion of three typical NPF days, during which the measured air masses were notably influenced by either anthropogenic activities, biogenic emissions, or mixed ocean and continental sources. Overall, simulated NPF events were generally in good agreement with the corresponding measurements, enabling us to get further insights into NPF processes in the YRD region. Based on the simulations, we conclude that besides gas-phase sulphuric acid, biogenic organic compounds, particularly monoterpenes, play an essential role in condensational growth of newly formed clusters and probably also in the particle formation process through their low volatile oxidation products. Although some uncertainties remain in this modelling system, this method provides a possibility to better understand the NPF processes.
- Subjects
NANJING (Jiangsu Sheng, China); METEOROLOGICAL observations; ATMOSPHERIC models; CLOUDS; CONDENSATION (Meteorology); POLLUTION; ATMOSPHERIC aerosols
- Publication
Atmospheric Chemistry & Physics Discussions, 2015, Vol 15, Issue 19, p27501
- ISSN
1680-7367
- Publication type
Article
- DOI
10.5194/acpd-15-27501-2015