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Abstract
Knowledge of hygroscopic properties is essential to prediction of the role of aerosol in cloud formation and lung deposition. Our objective was to introduce a new approach to classify and predict the hygroscopic growth factors (Gfs) of specific atmospheric sub-micrometre particle types in a mixed aerosol based on measurements of the ensemble hygroscopic growth factors and particle number size distribution (PNSD). Based on a non-linear regression model between aerosol source contributions from PMF applied to the PNSD data set and the measured Gf values (at 90% relative humidity) of ambient aerosols, the estimated mean Gf values for secondary inorganic, mixed secondary, nucleation, urban background, fresh, and aged traffic-generated particle classes at a diameter of 110 nm were found to be 1.51, 1.34, 1.12, 1.33, 1.09 and 1.10, respectively. It is found possible to impute (fill) missing HTDMA data sets using a Random Forest regression on PNSD and meteorological conditions.
Original language | English |
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Article number | 21 |
Journal | npj Climate and Atmospheric Science |
Volume | 4 |
Issue number | 1 |
DOIs | |
Publication status | Published - 25 Mar 2021 |
Bibliographical note
Funding Information:This research was supported by the UK Natural Environment Research Council funding though the AIRPOLL-Beijing project within the APHH programme (NE/N007190/1). We would like to thank the University of Manchester who collected the initial data set as part of the ClearfLo project (NERC funded under Grant NE/H00324X/1) for data sets archived on CEDA.
ASJC Scopus subject areas
- Global and Planetary Change
- Environmental Chemistry
- Atmospheric Science
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Dive into the research topics of 'Estimation of hygroscopic growth properties of source-related sub-micrometre particle types in a mixed urban aerosol'. Together they form a unique fingerprint.Projects
- 1 Finished
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Sources and Emissions of Air Pollutants in Beijing (AIRPOLL-Beijing)
Bloss, W. (Co-Investigator), Harrison, R. (Principal Investigator) & Shi, Z. (Co-Investigator)
Natural Environment Research Council, University Of York
1/01/16 → 31/12/19
Project: Research