[710] - Updated aerosol module and its application to simulate secondary organic aerosols during IMPACT campaign May

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Li, Y., Elbern, H., Lu, K., Friese, E., Kiendler-Scharr, A., Mentel, T. F., Wang, S., Wahner, A., Zhang, Y., 2013. Updated aerosol module and its application to simulate secondary organic aerosols during IMPACT campaign May. Atmospheric Chemistry and Physics, 13, 6289 - 6304. DOI: 10.5194/acp-13-6289-2013.
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Title(s):Main Title: Updated aerosol module and its application to simulate secondary organic aerosols during IMPACT campaign May
Description(s):Abstract: The formation of Secondary organic aerosol (SOA) was simulated with the Secondary ORGanic Aerosol Model (SORGAM) by a classical gas-particle partitioning concept, using the two-product model approach, which is widely used in chemical transport models. In this study, we extensively updated SORGAM including three major modifications: firstly, we derived temperature dependence functions of the SOA yields for aromatics and biogenic VOCs (volatile organic compounds), based on recent chamber studies within a sophisticated mathematic optimization framework; secondly, we implemented the SOA formation pathways from photo oxidation (OH initiated) of isoprene; thirdly, we implemented the SOA formation channel from NO3-initiated oxidation of reactive biogenic hydrocarbons (isoprene and monoterpenes). The temperature dependence functions of the SOA yields were validated against available chamber experiments, and the updated SORGAM with temperature dependence functions was evaluated with the chamber data. Good performance was found with the normalized mean error of less than 30 %. Moreover, the whole updated SORGAM module was validated against ambient SOA observations represented by the summed oxygenated organic aerosol (OOA) concentrations abstracted from aerosol mass spectrometer (AMS) measurements at a rural site near Rotterdam, the Netherlands, performed during the IMPACT campaign in May 2008. In this case, we embedded both the original and the updated SORGAM module into the EURopean Air pollution and Dispersion-Inverse Model (EURAD-IM), which showed general good agreements with the observed meteorological parameters and several secondary products such as O3, sulfate and nitrate. With the updated SORGAM module, the EURAD-IM model also captured the observed SOA concentrations reasonably well especially those during nighttime. In contrast, the EURAD-IM model before update underestimated the observations by a factor of up to 5. The large improvements of the modeled SOA concentrations by updated SORGAM were attributed to the mentioned three modifications. Embedding the temperature dependence functions of the SOA yields, including the new pathways from isoprene photo oxidations, and switching on the SOA formation from NO3 initiated biogenic VOC oxidations, contributed to this enhancement by 10, 22 and 47 %, respectively. However, the EURAD-IM model with updated SORGAM still clearly underestimated the afternoon SOA observations up to a factor of two.
Identifier(s):DOI: 10.5194/acp-13-6289-2013
Responsible Party
Creator(s):Author: Y.P. Li
Author: Hendrik Elbern
Author: K.D Lu
Author: Elmar Friese
Author: Astrid Kiendler-Scharr
Author: Thomas F. Mentel
Author: S. Wang
Author: Andreas Wahner
Author: Yuanhang Zhang
Publisher:European Geosciences Union
TR32 Topic:Atmosphere
Subject(s):CRC/TR32 Keywords: Atmosphere, Meteorology
File Details
File Name:2013_Li_ACP.pdf
Data Type:Text
Size(s):16 Pages
File Size:9280 kB (9.062 MB)
Date(s):Date Accepted: 2013-05-30
Issued: 2013-07-03
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
Measurement Region:TheNetherlands
Measurement Location:--TheNetherlands--
Specific Informations - Publication
Article Type:Journal
Source:Atmospheric Chemistry and Physics
Number Of Pages:16
Page Range:6289 - 6304
Metadata Details
Metadata Creator:Hendrik Elbern
Metadata Created:2013-12-03
Metadata Last Updated:2013-12-12
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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