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Measurements of Oxygenated Organic Chemicals In the Pacific Troposphere During TRACE-P: Higher Aldehydes (less than C(sub 1)), Their Sources, and Potential Role In Atmospheric OxidationAirborne measurements of a large number of oxygenated organics were carried out in the Pacific troposphere (to 12 km) in the Spring of 2001 (Feb. 24-April 10). Specifically these measurements included acetaldehyde, propanaldehyde, acetone, methylethyl ketone, methanol, ethanol, PAM and organic nitrates. Independent measurements of formaldehyde, peroxides, and tracers were also available. Highly polluted as well as pristine air masses were sampled. Oxygenated organics were abundant in the clean In troposphere and were greatly enhanced in the outflow regions from Asia. Extremely high concentrations of aldehydes could be measured in the troposphere. It is not possible to explain the large abundances of aldehydes in the background troposphere without invoking significant oceanic sources. A strong correlation between the observed mixing ratios of formaldehyde and acetaldehyde is present. We infer that higher aldehydes (such as acetaldehyde and propanaldehyde) may provide a large source of formaldehyde and sequester Cox throughout the troposphere. The atmospheric behavior of acetone, methylethyl ketone, and methanol is generally indicative of their common terrestrial sources with a Image contribution from biomass/biofuel burning. A vast body of data has been collected and it is being analyzed both statistically and with the help of models to better understand the role that oxygenated organics play in the atmosphere and to unravel their sources and sinks. These results will be presented.
Document ID
20020064474
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Singh, Hanwant B.
(NASA Ames Research Center Moffett Field, CA United States)
Salas, L.
(NASA Ames Research Center Moffett Field, CA United States)
Herlth, D.
(NASA Ames Research Center Moffett Field, CA United States)
Viezee, W.
(NASA Ames Research Center Moffett Field, CA United States)
Fried, A.
(NASA Ames Research Center Moffett Field, CA United States)
Jackob, D.
(NASA Ames Research Center Moffett Field, CA United States)
Blake, D.
(NASA Ames Research Center Moffett Field, CA United States)
Heikes, B.
(NASA Ames Research Center Moffett Field, CA United States)
Talbot, R.
(NASA Ames Research Center Moffett Field, CA United States)
Sachse, G.
(NASA Ames Research Center Moffett Field, CA United States)
Hipskind, R. Stephen
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Subject Category
Geophysics
Meeting Information
Meeting: 7th Scientific Conference of the International Global Atmospheric Chemistry Project
Location: Crete
Country: Greece
Start Date: September 18, 2002
End Date: September 25, 2002
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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