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| Titel |
Balloon-borne radiometer measurements of Northern Hemisphere mid-latitude stratospheric HNO3 profiles spanning 12 years |
| VerfasserIn |
M. Toohey, B. M. Quine, K. Strong, P. F. Bernath, C. D. Boone, A. I. Jonsson, C. T. McElroy, K. A. Walker, D. Wunch |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 7, no. 23 ; Nr. 7, no. 23 (2007-12-11), S.6075-6084 |
| Datensatznummer |
250005275
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| Publikation (Nr.) |
 copernicus.org/acp-7-6075-2007.pdf |
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| Zusammenfassung |
| Low-resolution atmospheric thermal emission spectra collected by
balloon-borne radiometers over the time span of 1990–2002 are used
to retrieve vertical profiles of HNO3, CFC-11 and CFC-12
volume mixing ratios between approximately 10 and 35 km altitude.
All of the data analyzed have been collected from launches from a
Northern Hemisphere mid-latitude site, during late summer, when
stratospheric dynamic variability is at a minimum. The retrieval
technique incorporates detailed forward modeling of the instrument
and the radiative properties of the atmosphere, and obtains a best
fit between modeled and measured spectra through a combination of
onion-peeling and optimization steps. The retrieved HNO3
profiles are consistent over the 12-year period, and are consistent
with recent measurements by the Atmospheric Chemistry
Experiment-Fourier transform spectrometer satellite instrument. We
therefore find no evidence of long-term changes in the HNO3
summer mid-latitude profile, although the uncertainty of our
measurements precludes a conclusive trend analysis. |
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