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Potential Source Density Function: A New Tool for Identifying Air Pollution Sources

Title
Potential Source Density Function: A New Tool for Identifying Air Pollution Sources
Authors
Kim I.S.Kim Y.P.Wee D.
Ewha Authors
김용표위대현
SCOPUS Author ID
김용표scopus; 위대현scopus
Issue Date
2022
Journal Title
Aerosol and Air Quality Research
ISSN
1680-8584JCR Link
Citation
Aerosol and Air Quality Research vol. 22, no. 2
Keywords
Air pollutionGaussian processRegressionSource identificationTrajectory analysis
Publisher
AAGR Aerosol and Air Quality Research
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Potential source density function (PSDF) is developed to identify, that is, locate and quantify, source areas of ambient trace species based on Gaussian process regression (GPR), a machine-learning technique. The PSDF model requires backward trajectories and sampling data at a receptor site in the calculation as in the conventional model to locate source areas of ambient trace species, such as the potential source contribution function (PSCF). The PSDF model can identify source areas quantitatively and provide information on the reliability of the estimation, while the PSCF model cannot. To verify and evaluate the capability of the PSDF model, tests are carried out using three scenarios based on ambient trajectory analysis data and simulated source distributions. The test results demonstrate that the PSDF model can identify the sources of ambient trace species more accurately than the PSCF model. The PSDF model can quantify the size of the source contaminating the air parcels passing through it, and the model can detect the variation of source intensity. Also, in the test, we evaluate reliability of the information provided by the PSDF model. In addition, future works are recommended to improve the model and increase its applicability. The Author(s).
DOI
10.4209/aaqr.210236
Appears in Collections:
공과대학 > 화공신소재공학과 > Journal papers
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