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- Achtert, Peggy,1982-Stockholms universitet,Meteorologiska institutionen (MISU) (author)
Hygroscopic growth of tropospheric particle number size distributions over the North China Plain
- Article/chapterEnglish2009
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- 2009
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- LIBRIS-ID:oai:DiVA.org:su-60261
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-60261URI
- https://doi.org/10.1029/2008JD010921DOI
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- Language:English
- Summary in:English
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- authorCount :10
- The hygroscopic growth of atmospheric submicrometer particle size distributions (diameter D-p ranging from 22 to 900 nm) was studied at a rural/suburban site in the North China Plain within the framework of the international Campaigns of Air Quality Research in Beijing and Surrounding Region 2006 (CAREBeijing-2006) research project. The goal was to characterize the regional aerosol in the polluted northeastern plain in China. Size descriptive hygroscopic growth factors (DHGFs) were determined as a function of relative humidity (RH) by relating the particle number size distribution at a dry condition ( 100 nm), the DHGF are substantially higher than in the Aitken particle mode (D-p < 100 nm) as a result of different chemical composition. The size-dependent behavior of the DHGF highlights the relevance of particulate sulfate production over the North China Plain, accomplished by secondary formation from the gas phase and, potentially, liquid phase processes in convective clouds. Furthermore, all results concerning the DHGF show a significant dependency on meteorological air masses. The hygroscopic growth of accumulation mode particles correlates significantly with the PM1-mass fraction of sulfate ions determined by chemical analysis. Finally, this investigation provides a parameterization of the hygroscopic growth of 250-nm particles, which might be useful when predicting visibility and radiative forcing and performing atmospheric aerosol model validations.
Subject headings and genre
- NATURVETENSKAP Geovetenskap och miljövetenskap Meteorologi och atmosfärforskning hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Meteorology and Atmospheric Sciences hsv//eng
- atmosfärvetenskap och oceanografi
- Atmospheric Sciences and Oceanography
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- Birmili, W. (author)
- Nowak, A. (author)
- Wehner, B. (author)
- Wiedensohler, A. (author)
- Takegawa, N. (author)
- Kondo, Y. (author)
- Miyazaki, Y. (author)
- Hu, M. (author)
- Zhu, T. (author)
- Stockholms universitetMeteorologiska institutionen (MISU) (creator_code:org_t)
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- In:Journal of Geophysical Research114, s. D00G07-0148-02272156-2202
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