Journal article
Highlights of OH, H2SO4, and methane sulfonic acid measurements made aboard the NASA P‐3B during Transport and Chemical Evolution over the Pacific
Journal of Geophysical Research: Atmospheres, v 108(D20), pp 8796-n/a
27 Oct 2003
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Measurements of hydroxyl radical (OH), sulfuric acid (H2SO4), and methane sulfonic acid (MSA) were performed aboard the NASA P‐3B using the selected ion chemical ionization mass spectrometry technique during the Transport and Chemical Evolution over the Pacific (TRACE‐P) study. Photochemical box model calculations of OH concentrations yielded generally good agreement with an overall tendency to overestimate the measured OH by ∼20%. Further analysis reveals that this overestimation is present only at altitudes greater than ∼1.5 km, with the model underestimating OH measurements at lower altitudes. Boundary layer H2SO4 measurements, performed in a volcanic plume off the southern coast of Japan, revealed some of the largest marine boundary layer H2SO4 concentrations ever observed and were accompanied by new particle formation. Nighttime measurements of OH, H2SO4, and MSA in the remote pacific off Midway Island revealed significant boundary layer concentrations of H2SO4 and MSA, indicating evidence of nighttime boundary layer oxidation processes but in the absence of OH. A cursory exploration of the sources of production of the H2SO4 and MSA observed at night is presented.
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Details
- Title
- Highlights of OH, H2SO4, and methane sulfonic acid measurements made aboard the NASA P‐3B during Transport and Chemical Evolution over the Pacific
- Creators
- R. L. Mauldin - National Center for Atmospheric ResearchC. A. Cantrell - National Center for Atmospheric ResearchM. Zondlo - National Center for Atmospheric ResearchE. Kosciuch - National Center for Atmospheric ResearchF. L. Eisele - National Center for Atmospheric ResearchG. Chen - Langley Research CenterD. Davis - Georgia Institute of TechnologyR. Weber - Georgia Institute of TechnologyJ. Crawford - Langley Research CenterD. Blake - University of California, IrvineA. Bandy - Drexel UniversityD. Thornton - Drexel University
- Publication Details
- Journal of Geophysical Research: Atmospheres, v 108(D20), pp 8796-n/a
- Number of pages
- 13
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Digital Media; Chemistry
- Web of Science ID
- WOS:000186395300003
- Other Identifier
- 991019169420304721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Meteorology & Atmospheric Sciences