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Article: The influence of relative humidity on the size of atmospheric aerosol

TitleThe influence of relative humidity on the size of atmospheric aerosol
Authors
KeywordsAerosol
Deliquescence
Hygroscopic
Relative Humidity
Issue Date1997
Citation
Journal Of Environmental Science And Health - Part A Environmental Science And Engineering And Toxic And Hazardous Substance Control, 1997, v. 32 n. 4, p. 1085-1097 How to Cite?
AbstractThe relative humidity of ambient air is very often over 75% throughout the year in Taiwan. Thus, the influence of relative humidity on the growth of hygroscopic aerosols in the atmosphere is particularly important. In this study, a TDMA system (Tandem Differential Mobility Analyzer) equipped with newly developed a SMPS (Scanning Mobility Particle Sizer) was used to observe the sizes of submicron ammonium sulfate aerosols, from 63.8nm to 224.7nm, at five controlled relative humidities, 50%, 75%, 81%, 85% and 89%. It is the first time that the hygroscopic growths and deliquescence points of submicron aerosols of ammonium sulfate have ever been closely observed by use of the SMPS. The expermental results showed that the abrupt size changes of aerosols at their deliquescence points can be more precisely observed than in previous studies. It was also shown that there was no apparent growth in an ammonium sulfate aerosol until the relative humidities was over 75%. At relative humidities between 81% and 89%, the growth ratio of size was about a factor of 1.3 to 1.6 and the water content of ammonium sulfate aerosols by mass was about 47% to 66%.
Persistent Identifierhttp://hdl.handle.net/10722/178595
ISSN

 

DC FieldValueLanguage
dc.contributor.authorLee, WMGen_US
dc.contributor.authorShih, PMen_US
dc.contributor.authorWang, CSen_US
dc.date.accessioned2012-12-19T09:48:34Z-
dc.date.available2012-12-19T09:48:34Z-
dc.date.issued1997en_US
dc.identifier.citationJournal Of Environmental Science And Health - Part A Environmental Science And Engineering And Toxic And Hazardous Substance Control, 1997, v. 32 n. 4, p. 1085-1097en_US
dc.identifier.issn1077-1204en_US
dc.identifier.urihttp://hdl.handle.net/10722/178595-
dc.description.abstractThe relative humidity of ambient air is very often over 75% throughout the year in Taiwan. Thus, the influence of relative humidity on the growth of hygroscopic aerosols in the atmosphere is particularly important. In this study, a TDMA system (Tandem Differential Mobility Analyzer) equipped with newly developed a SMPS (Scanning Mobility Particle Sizer) was used to observe the sizes of submicron ammonium sulfate aerosols, from 63.8nm to 224.7nm, at five controlled relative humidities, 50%, 75%, 81%, 85% and 89%. It is the first time that the hygroscopic growths and deliquescence points of submicron aerosols of ammonium sulfate have ever been closely observed by use of the SMPS. The expermental results showed that the abrupt size changes of aerosols at their deliquescence points can be more precisely observed than in previous studies. It was also shown that there was no apparent growth in an ammonium sulfate aerosol until the relative humidities was over 75%. At relative humidities between 81% and 89%, the growth ratio of size was about a factor of 1.3 to 1.6 and the water content of ammonium sulfate aerosols by mass was about 47% to 66%.en_US
dc.languageengen_US
dc.relation.ispartofJournal of Environmental Science and Health - Part A Environmental Science and Engineering and Toxic and Hazardous Substance Controlen_US
dc.subjectAerosolen_US
dc.subjectDeliquescenceen_US
dc.subjectHygroscopicen_US
dc.subjectRelative Humidityen_US
dc.titleThe influence of relative humidity on the size of atmospheric aerosolen_US
dc.typeArticleen_US
dc.identifier.emailLee, WMG: hrszlwm@hku.hken_US
dc.identifier.authorityLee, WMG=rp00728en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0030615586en_US
dc.identifier.volume32en_US
dc.identifier.issue4en_US
dc.identifier.spage1085en_US
dc.identifier.epage1097en_US
dc.identifier.scopusauthoridLee, WMG=24799156600en_US
dc.identifier.scopusauthoridShih, PM=36727961500en_US
dc.identifier.scopusauthoridWang, CS=7501641758en_US

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