Title:
Measurement of Pernitric Acid, Hydrogen Chloride, and Sulfur Dioxide during the Intercontinental Chemical Transport Experiment Campaign

Simple item page
dc.contributor.advisor Huey, L. Gregory
dc.contributor.author Kim, Sae Wung en_US
dc.contributor.committeeMember Chen, Gao
dc.contributor.committeeMember Sokolik, Irina
dc.contributor.committeeMember Weber, Rodney
dc.contributor.committeeMember Wine, Paul
dc.contributor.department Earth and Atmospheric Sciences en_US
dc.date.accessioned 2008-02-07T18:13:36Z
dc.date.available 2008-02-07T18:13:36Z
dc.date.issued 2007-11-12 en_US
dc.description.abstract This study presents airborne measurements of HO2NO2, HCl and SO2 using chemical ionization mass spectrometry (CIMS) during the Intercontinental Chemical Transport Experiment (INTEX) field campaign, an intensive study to characterize the chemical composition of the troposphere in the eastern United States, Mexico City, and the North Pacific which is the outflow region of Asia. The first direct in situ measurements of HO2NO2 were made in the free troposphere over the eastern U.S. during summer 2004. The highest mean mixing ratio of 76 pptv (median = 77 pptv, = 39 pptv) was observed in the altitude range of 8-9 km. Highly constrained steady state calculations of HO2NO2 using measured HOx levels are poorly correlated with observed HO2NO2 in the upper troposphere (8 km < z < 12 km; the median ratio of [HO2NO2]SS-MEA/[HO2NO2]MEA = 2.9). However, steady state HO2NO2 using model-derived HOx shows reasonable agreement with measurements in the free troposphere ([HO2NO2]SS-MEA/[HO2NO2]MEA = 1.3). The vertical distribution of HCl was measured over the north Pacific during May 2006 from the marine boundary layer (MBL) up to lower stratosphere. Recent stratospheric influence in the upper troposphere (8 km < z < 12 km) was efficiently identified from enhanced HCl (up to ~100 pptv) relative to very low background levels (< 2pptv). In the remote MBL, the acidification of seasalt aerosols by HNO3 appeared to be the major source of HCl, with level consistently over 20 pptv (up to 400 pptv). The distribution of SO2 was measured in the outflow region of the eastern U.S. and Asia; two major anthropogenic SO2 source regions. This study presents vertical and horizontal distributions of SO2 and relevant gas phase and aerosol parameters to characterize SO2 transport in the troposphere. SO2 in the boundary layer was efficiently transported to the upper troposphere by deep convection and frontal uplift processes. High SO2 in convective plume in the upper troposphere were strongly correlated with ultrafine aerosols.Conversely, SO2 from frontal uplift shows a strong correlation with non-volatile aerosols. Comparisons of SO2 products from global 3-D chemical transportation models (GEOS-CHEM and MOZART) with observations suggest that sulfur sources are relatively well described but that the oxidation mechanism needs refinement. en_US
dc.description.degree Ph.D. en_US
dc.identifier.uri http://hdl.handle.net/1853/19729
dc.publisher Georgia Institute of Technology en_US
dc.subject CIMS en_US
dc.subject Pernitric acid en_US
dc.subject Hydrogen chloride en_US
dc.subject Sulfur dioxide en_US
dc.subject Airborne measurement en_US
dc.subject INTEX en_US
dc.subject.lcsh Tropospheric chemistry
dc.subject.lcsh Pollution
dc.subject.lcsh Air
dc.title Measurement of Pernitric Acid, Hydrogen Chloride, and Sulfur Dioxide during the Intercontinental Chemical Transport Experiment Campaign en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.advisor Huey, L. Gregory
local.contributor.corporatename School of Earth and Atmospheric Sciences
local.contributor.corporatename College of Sciences
relation.isAdvisorOfPublication 84fa9157-ac81-44bf-b0d8-ef05d70c7122
relation.isOrgUnitOfPublication b3e45057-a6e8-4c24-aaaa-fb00c911603e
relation.isOrgUnitOfPublication 85042be6-2d68-4e07-b384-e1f908fae48a
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Kim_Saewung_200712_phd.pdf
Size:
3.29 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Theses and Dissertations