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Interpretation of NO(x)/NO(y) observations from AASE-2 using a model of chemistry along trajectoriesIn situ measurements of NO and NO(y) are used to derive the ratio NO(x)/NO(y) along the flight track of the NASA ER-2 aircraft. Data are presented for two flights at midlatitudes in October 1991 during the Airborne Arctic Stratospheric Expedition-2 (AASE-2). Aerosol particle surface area was concurrently measured. The observations are compared with a photochemical model integrated along back trajectories from the aircraft flight track. Comparison of observations with the model run along trajectories and at a fixed position clearly and quantitatively demonstrates the importance of an air parcel's dynamic history in interpretation of local chemical observations. Comparison of the data with model runs under different assumptions regarding heterogeneous chemistry further reinforces the case for occurrence of the reaction of N2O5 + H2O on sulfate aerosol surfaces in the atmosphere. Finally, comparisons for which relative changes in the model and the data are not consistent caution that our ability to resolve all the observations is not yet complete.
Document ID
19950044315
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kawa, S. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Fahey, D. W.
(NOAA, Boulder, CO United States)
Wilson, J. C.
(Univ. of Denver, Denver, CO United States)
Schoeberl, M. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Douglass, A. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Stolarski, R. S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Woodbridge, E. L.
(NOAA, Boulder, CO United States)
Jonsson, H.
(Univ. of Denver, Denver, CO United States)
Lait, L. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Newman, P. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
November 19, 1993
Publication Information
Publication: Geophysical Research Letters
Volume: 20
Issue: 22
ISSN: 0094-8276
Subject Category
Environment Pollution
Accession Number
95A75914
Distribution Limits
Public
Copyright
Other

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