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| Titel |
The use of NO2 absorption cross section temperature sensitivity to derive NO2 profile temperature and stratospheric–tropospheric column partitioning from visible direct-sun DOAS measurements |
| VerfasserIn |
E. Spinei, A. Cede, W. H. Swartz, J. Herman, G. H. Mount |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 12 ; Nr. 7, no. 12 (2014-12-09), S.4299-4316 |
| Datensatznummer |
250115986
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| Publikation (Nr.) |
 copernicus.org/amt-7-4299-2014.pdf |
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| Zusammenfassung |
This paper presents a temperature sensitivity method (TESEM) to
accurately calculate total vertical NO2 column, atmospheric
slant NO2 profile-weighted temperature (T), and to
separate stratospheric and tropospheric columns from direct-sun (DS),
ground-based measurements using the retrieved T. TESEM is based on
differential optical absorption spectroscopy (DOAS) fitting of the
linear temperature-dependent NO2 absorption cross section,
σ (T), regression model (Vandaele et al., 2003). Separation
between stratospheric and tropospheric columns is based on the
primarily bimodal vertical distribution of NO2 and an assumption
that stratospheric effective temperature can be represented by temperature
at 27 km ± 3 K, and tropospheric effective temperature is equal to surface
temperature within 3–5 K. These assumptions were derived from the Global
Modeling Initiative (GMI) chemistry-transport model (CTM) simulations over
two northern midlatitude sites in 2011.
TESEM was applied to the Washington State University Multi-Function
DOAS instrument (MFDOAS) measurements at four midlatitude locations
with low and moderate NO2 anthropogenic emissions: (1) the Jet Propulsion Laboratory's Table
Mountain Facility (JPL-TMF), CA, USA
(34.38° N/117.68° W); (2) Pullman, WA, USA
(46.73° N/117.17° W); (3) Greenbelt, MD, USA
(38.99° N/76.84° W); and (4) Cabauw, the
Netherlands (51.97° N/4.93° E) during July 2007,
June–July 2009, July–August and October 2011,
November 2012–May 2013, respectively.
NO2 T and total, stratospheric, and tropospheric
NO2 vertical columns were determined over each site. |
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