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Stratospheric NO and NO_2 abundances from ATMOS Solar-Occultation Measurements

Newchurch, M. J. and Allen, M. and Gunson, M. R. and Salawitch, R. J. and Collins, G. B. and Huston, K. H. and Abbas, M. M. and Abrams, M. C. and Chang, A. Y. and Fahey, D. W. and Gao, R. S. and Irion, F. W. and Loewenstein, M. and Manney, G. L. and Michelsen, H. A. and Podolske, J. R. and Rinsland, C. P. and Zander, R. (1996) Stratospheric NO and NO_2 abundances from ATMOS Solar-Occultation Measurements. Geophysical Research Letters, 23 (17). pp. 2373-2376. ISSN 0094-8276. doi:10.1029/96GL01196.

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Using results from a time-dependent photochemical model to calculate the diurnal variation of NO and NO_2, we have corrected Atmospheric Trace MOlecule Spectroscopy (ATMOS) solar-occultation retrievals of the NO and NO_2 abundances at 90° solar zenith angle. Neglecting to adjust for the rapid variation of these gases across the terminator results in potential errors in retrieved profiles of ∼20% for NO_2 and greater than 100% for NO at altitudes below 25 km. Sensitivity analysis indicates that knowledge of the local O_3 and temperature profiles, rather than zonal mean or climatological conditions of these quantities, is required to obtain reliable retrievals of NO and NO_2 in the lower stratosphere. Extremely inaccurate O_3 or temperature values at 20 km can result in 50% errors in retrieved NO or NO_2. Mixing ratios of NO in the mid-latitude, lower stratosphere measured by ATMOS during the November 1994 ATLAS-3 mission compare favorably with in situ ER-2 observations, providing strong corroboration of the reliability of the adjusted space-borne measurements.

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Alternate Title:Stratospheric NO and NO2 abundances from ATMOS Solar-Occultation Measurements
Additional Information:Copyright 1996 by the American Geophysical Union. (Received October, 17, 1995; revised March 8, 1996; accepted March 22, 1996.) Paper number 96GL01196. This work was supported in part by the NASA Atmospheric Chemistry Modeling and Analysis Program, NASA/MSFC Earth Sciences and Applications Division contract NAS8-38609, and JPL-959894. Work at the Jet Propulsion Laboratory, California Institute of Technology was done under contract with the National Aeronautics and Space Administration. Partial support was received from NASA grant NAGW-1538 to the California Institute of Technology.
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ID Code:51023
Deposited By: George Porter
Deposited On:29 Oct 2014 21:21
Last Modified:10 Nov 2021 19:04

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