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| Titel |
Tropospheric trace gas column observations from GOME-2 for air quality applications |
| VerfasserIn |
Pieter Valks, Nan Hao, Pascal Hedelt, Diego Loyola, Gaia Pinardi, Michel Van Roozendael, Isabelle De Smedt, Andy Delcloo |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250097995
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| Publikation (Nr.) |
 EGU/EGU2014-13629.pdf |
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| Zusammenfassung |
| This contribution focuses on the tropospheric GOME-2 trace gas column products developed in the framework of EUMETSAT’s Satellite Application Facility on Ozone and Atmospheric Chemistry Monitoring (O3M-SAF). We present an overview of the retrieval algorithms for tropospheric NO2, SO2, CH2O and tropical tropospheric ozone, and we show examples of air quality applications using observations from the GOME-2 instruments on MetOp-A and MetOp-B.
The tropospheric trace gas column products are retrieved from GOME-2 solar backscattered measurements in the UV and VIS wavelength regions using the GOME Data Processor (GDP) version 4.7. Tropospheric NO2 is retrieved with the Differential Optical Absorption Spectroscopy (DOAS) method in the 425-450 nm wavelength region. SO2 emissions from anthropogenic sources can be measured by GOME-2 using the UV wavelength region around 320 nm. The GOME-2 NO2 and SO2 products are available in near real time, i.e. within two hours after sensing. For CH2O, an optimal DOAS fitting window around 335 nm has been determined for GOME-2. Tropospheric ozone columns for tropical areas are derived from GOME-2 observations using a cloud slicing method.
The use of tropospheric trace gas observations from the GOME-2 instruments on MetOp-A and MetOp-B for air quality observations will be illustrated for China and Europe. Time-series of tropospheric ozone, NO2, SO2 and CH2O for the Pearl River Delta in Southern China (including Hong Kong) are analysed to investigate possible trends in air pollutants. This highly populated sub-tropical area frequently suffers severe episodes of photochemical smog. Furthermore, comparisons of tropospheric GOME-2 observations with ground-based measurements from several sites in Europe and China will be presented. |
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