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| Titel |
Spatial and temporal UV irradiance and aerosol variability within the area of an OMI satellite pixel |
| VerfasserIn |
S. Kazadzis, A. Bais, D. Balis, N. Kouremeti, M. Zempila, A. Arola, E. Giannakaki, V. Amiridis, A. Kazantzidis |
| 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 ; 9, no. 14 ; Nr. 9, no. 14 (2009-07-16), S.4593-4601 |
| Datensatznummer |
250007504
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| Publikation (Nr.) |
 copernicus.org/acp-9-4593-2009.pdf |
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| Zusammenfassung |
| Results of an experimental campaign that took place in the greater
Thessaloniki area were used to investigate temporal and spatial UV
variability within an OMI satellite pixel. UV irradiance and aerosol optical
depth measurements were performed for a one month period at three sites
characterized as urban, rural and industrial, depending on their location
and possible local aerosol sources. OMI showed a general UV irradiance
overestimation compared to all three sites and for all atmospheric
conditions. During the campaign the standard deviation calculated from the
three sites for UV irradiance at 324 nm was of the order of 26%. For
cloudless days with high spatial aerosol variability, UV differences reached
±20% within the OMI pixel. For cloudy days UV differences up to
100% were found at the three sites, a percentage that depends on the
ground-based data integration time used for the comparison. Here we tried to
focus on the limitations when trying to interpret results of UV irradiance
comparisons between OMI satellite and ground based stations, taking into
account the UV variability within an OMI pixel, due to such small scale
spatial cloud and aerosol inhomogeneities. |
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