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| Titel |
Tropospheric NO2 columns: a comparison between model and retrieved data from GOME measurements |
| VerfasserIn |
A. Lauer, M. Dameris, A. Richter, J. P. Burrows |
| 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 ; 2, no. 1 ; Nr. 2, no. 1 (2002-04-19), S.67-78 |
| Datensatznummer |
250000372
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| Publikation (Nr.) |
 copernicus.org/acp-2-67-2002.pdf |
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| Zusammenfassung |
Tropospheric
NO2 plays a variety of significant roles in atmospheric chemistry. In the troposphere it is one of the most
significant precursors of photochemical ozone (O3) production and
nitric acid (HNO3). In this study tropospheric
NO2
columns were calculated by the fully coupled chemistry-climate model
ECHAM4.L39(DLR)/CHEM. These have been compared with tropospheric
NO2
columns, retrieved using the tropospheric excess method
from measurements by the Global Ozone Monitoring Experiment (GOME) of up-welling earthshine radiance and the extraterrestrial
irradiance. GOME is part of the core payload of the second European Research Satellite (ERS-2). For this study the first five years of GOME
measurements have been used. The period of five years of observational data is sufficiently long to facilitate
for the first time a comparison based on climatological averages with global coverage, focussing on the
geographical distribution of the tropospheric
NO2.
A new approach of analysing regional differences (i.e. on continental scales) by calculating individual averages for different environments
provides more detailed information about specific
NOx
sources and of their seasonal variations. The results obtained enable the validity of the model
NO2
source distribution and the
assumptions used to separate tropospheric and stratospheric parts of the
NO2
column amount from the satellite measurements to be
investigated. |
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