the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Monitoring of inorganic ions, carbonaceous matter and mass in ambient aerosol particles with online and offline methods
H. Timonen
M. Aurela
K. Saarnio
A. Frey
S. Saarikoski
K. Teinilä
M. Kulmala
R. Hillamo
Abstract. Year-long high timeresolution measurements of major chemical components in atmospheric sub-micrometer particles were conducted at an urban background station in Finland 2006–2007. Ions were analyzed using a particle-into-liquid sampler combined with an ion chromatograph (PILS-IC), organic and elemental carbon (OC and EC) by using a semicontinuos OC/EC aerosol carbon analyzer (RT-OCEC), and PM2.5 mass with a tapered element oscillating microbalance (TEOM). Long time series provides information on differences between the used measurement techniques as well as information about the diurnal and seasonal changes. Chemical mass closure was constructed by comparing the identified aerosol mass with the measured PM2.5. The sum of all components measured online (ions, particulate organic matter (POM), EC) represented only 65% of the total PM2.5 mass. The difference can be explained by the difference in cutoff sizes (PM1 for online measurements, PM2.5 for total mass) and by evaporation of the semivolatile/volatile components. In general, some differences in results were observed when the results of the continuous/semicontinuous instruments were compared with those of the conventional filter samplings. For non-volatile compounds, like sulfate and potassium, correlation between the filter samples and the PILS was good but greater differences were observed for the semivolatile compounds like nitrate and ammonium. For OC the results of the RT-OCEC were on average 10% larger than those of the filters. When compared to filter measurements, high resolution measurements provide important data on short pollution plumes as well as on diurnal changes. Clear seasonal and diurnal cycles were observed for nitrate and EC.
- Preprint
(2385 KB) - Metadata XML
- BibTeX
- EndNote
H. Timonen et al.


-
RC C2316: 'Interactive comment on "Monitoring of inorganic ions, carbonaceous matter and mass with online and offline methods" by H. Timonen et al.', Anonymous Referee #2, 08 Dec 2011
-
AC C2676: 'Responses to the comments of reviewer 2 (AMTD MS No.: amt-2011-48)', Hilkka Timonen, 20 Jan 2012
-
AC C2676: 'Responses to the comments of reviewer 2 (AMTD MS No.: amt-2011-48)', Hilkka Timonen, 20 Jan 2012
-
RC C2335: 'A review', Anonymous Referee #3, 09 Dec 2011
-
AC C2680: 'Responses to the comments of reviewer 3 (AMTD MS No.: amt-2011-48)', Hilkka Timonen, 20 Jan 2012
-
AC C2680: 'Responses to the comments of reviewer 3 (AMTD MS No.: amt-2011-48)', Hilkka Timonen, 20 Jan 2012


-
RC C2316: 'Interactive comment on "Monitoring of inorganic ions, carbonaceous matter and mass with online and offline methods" by H. Timonen et al.', Anonymous Referee #2, 08 Dec 2011
-
AC C2676: 'Responses to the comments of reviewer 2 (AMTD MS No.: amt-2011-48)', Hilkka Timonen, 20 Jan 2012
-
AC C2676: 'Responses to the comments of reviewer 2 (AMTD MS No.: amt-2011-48)', Hilkka Timonen, 20 Jan 2012
-
RC C2335: 'A review', Anonymous Referee #3, 09 Dec 2011
-
AC C2680: 'Responses to the comments of reviewer 3 (AMTD MS No.: amt-2011-48)', Hilkka Timonen, 20 Jan 2012
-
AC C2680: 'Responses to the comments of reviewer 3 (AMTD MS No.: amt-2011-48)', Hilkka Timonen, 20 Jan 2012
H. Timonen et al.
H. Timonen et al.
Viewed
HTML | XML | Total | BibTeX | EndNote | |
---|---|---|---|---|---|
852 | 485 | 89 | 1,426 | 81 | 69 |
- HTML: 852
- PDF: 485
- XML: 89
- Total: 1,426
- BibTeX: 81
- EndNote: 69
Cited
5 citations as recorded by crossref.
- Characteristics, sources and water-solubility of ambient submicron organic aerosol in springtime in Helsinki, Finland H. Timonen et al. 10.1016/j.jaerosci.2012.06.005
- Spatial and temporal (short and long-term) variability of submicron, fine and sub-10 μm particulate matter (PM1, PM2.5, PM10) in Cyprus M. Pikridas et al. 10.1016/j.atmosenv.2018.07.048
- Online determination of levoglucosan in ambient aerosols with particle-into-liquid sampler – high-performance anion-exchange chromatography – mass spectrometry (PILS–HPAEC–MS) K. Saarnio et al. 10.5194/amt-6-2839-2013
- A Comparison Between a Semi-Continuous Analyzer and Filter-Based Method for Measuring Anion and Cation Concentrations in PM10at an Urban Background Site in London S. Beccaceci et al. 10.1080/02786826.2015.1073848
- Water soluble aerosols and gases at a UK background site – Part 1: Controls of PM<sub>2.5</sub> and PM<sub>10</sub> aerosol composition M. Twigg et al. 10.5194/acp-15-8131-2015