Autor:	Frank Arnold, Terry Deshler, Stefan Spreng, Joachim Curtius
Rok vydání:	1998
Předmět:	Atmospheric Science Analytical chemistry Mixing (process engineering) Sulfuric acid respiratory system Mass spectrometry Atmospheric sciences complex mixtures Aerosol chemistry.chemical_compound Altitude chemistry Mixing ratio Environmental Chemistry Vaporizer Stratosphere
Zdroj:	Journal of Atmospheric Chemistry. 30:3-10
ISSN:	0167-7764
Popis:	The first direct in situ measurements of the sulfuric acid contained in stratospheric aerosol particles were made using a novel balloon-based Ion Molecule Reaction Mass Spectrometer instrument (IMRMS) equipped with an aerosol vaporizer. The IMRMS method employed offers direct aerosol sulfuric acid measurements with high spatial resolution. The balloon flight took place on 23 October 1995 in middle latitudes (44°N) and reached a maximum altitude of 24 km. Measured molecular number densities of aerosol sulfuric acid decreased with increasing altitude from about 2.9 × 109 cm-3 at 15km altitude to about 2.4 × 108 cm-3 at 21 km. Corresponding mass mixing ratios are 2.5 and 0.6 ppbm, respectively. Calculated sulfuric acid mixing ratios from aerosol volumes inferred from aerosol size distribution measurements on the same balloon agree well with the IMRMS data using standard assumption aerosol composition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7e7f148c5cd8d5d03235ffe8cec78e06 https://doi.org/10.1023/a:1006067511568 Zobrazit plný text záznamu Full text from SpringerLink