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  Measurement of aerosol sulfuric acid 2. Pronounced layering in the free troposphere during the second Aerosol Characterization Experiment (ACE 2)

Curtius, J., Sierau, B., Arnold, F., de Reus, M., Strom, J., Scheeren, H. A., et al. (2001). Measurement of aerosol sulfuric acid 2. Pronounced layering in the free troposphere during the second Aerosol Characterization Experiment (ACE 2). Journal of Geophysical Research-Atmospheres, 106(D23), 31975-31990.

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Curtius, J.1, Author              
Sierau, B.2, Author
Arnold, F.1, Author              
de Reus, M.1, Author              
Strom, J.2, Author
Scheeren, H. A.1, Author              
Lelieveld, J.1, Author              
Affiliations:
1Frank Arnold - Atmospheric Trace Gases and Ions, Research Groups, MPI for Nuclear Physics, Max Planck Society, ou_907557              
2NOAA, Aeron Lab, R-AL2,325 Broadway, Boulder, CO 80305 USA; Stockholm Univ, Inst Meteorol, S-10691 Stockholm, Sweden; Univ Utrecht, Inst Marine & Atmospher Res, NL-3584 CC Utrecht, Netherlands, ou_persistent22              

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 Abstract: Measurements of aerosol sulfuric acid in the free troposphere were performed in the vicinity of Tenerife, Canary Islands (28degreesN, 16degreesW), in July 1997. These measurements were carried out on board a Dutch Cessna Citation 11 research aircraft within the framework of the second Aerosol Characterization Experiment (ACE 2). We used the Volatile Aerosol Component Analyzer for the detection of sulfuric acid (H2SO4). Vertical profiles between 2 and 13 km altitude were obtained. Typically, H2SO4 mixing ratios ranged between 10 and 120 pptv. Between 4 and 6 km altitude a distinct H2SO4 aerosol layer was observed repeatedly with H2SO4 mixing ratios of up to 550 pptv. The measurements are in agreement with total aerosol mass concentrations inferred from simultaneous measurements of aerosol size distributions using two condensation particle counters, a differential mobility analyzer, and an optical aerosol counter. At altitudes above 4 km the predominant aerosol component was sulfuric acid, frequently correlated with ozone, suggesting photochemical air pollution as a common source. Sulfur dioxide measured by chemical ionization mass spectrometry technique revealed typical mixing ratios between 10 and 60 pptv at altitudes above 6 kin and up to 200 pptv in the lower troposphere.

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Language(s): eng - English
 Dates: 2001-12-16
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 31335
ISI: 000173479100026
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Title: Journal of Geophysical Research-Atmospheres
  Alternative Title : J. Geophys. Res.-Atmos.
Source Genre: Journal
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Pages: - Volume / Issue: 106 (D23) Sequence Number: - Start / End Page: 31975 - 31990 Identifier: ISSN: 0747-7309