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| Titel |
Detection of polar stratospheric clouds with ERS-2/GOME data |
| VerfasserIn |
R. Meerkoetter |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 13, no. 4 ; Nr. 13, no. 4, S.395-405 |
| Datensatznummer |
250011819
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| Publikation (Nr.) |
 copernicus.org/angeo-13-395-1995.pdf |
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| Zusammenfassung |
| Based on radiative transfer calculations, it
is studied whether polar stratospheric clouds (PSCs) can be detected by the new
Global Ozone Monitoring Experiment (GOME) on board the second European Research
Satellite (ERS-2) planned to be launched in 1995. It is proposed to identify PSC-covered
areas by use of an indicator, the Normalized Radiance Difference (NRD), which
relates the difference of two spectral radiances at 0.515 µm and 0.67 µm to
one radiance measured in the centre of the oxygen A-band at 0.76 µm.
Simulations are carried out for two solar zenith angles, θ=78.5°
and θ=86.2°. They indicate that, in presence of PSCs and with
increasing solar zenith angles above θ=80°, the NRD decrease to
values clearly below those derived under conditions of a cloud-free
stratosphere. Results for θ=86.2° show that the method is
successful independent of existing tropospheric clouds, of different
tropospheric aerosol loadings, and of surface albedos. Results for
θ=78.5° illustrate that PSC detection under conditions of smaller
solar zenith angles θ80° needs additional information about
tropospheric clouds. |
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