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| Titel |
Radiation transfer in stratus clouds at the BSRN Payerne site |
| VerfasserIn |
D. Nowak, L. Vuilleumier, A. Ohmura |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021509
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| Zusammenfassung |
| The effect of clouds on radiation is responsible for large uncertainties in climatology. A
project was carried out for characterizing the effects of clouds on radiation using data
collected at the Payerne station (Switzerland) of the Baseline Surface Radiation Network
(BSRN). The effects of stratiform clouds on solar radiation were analyzed, focusing on the
absorption, transmission and reflectance of the clouds.
Specific well defined single-layer stratus cloud cases observed at the Payerne station are
presented. The corresponding shortwave atmospheric radiation transfer is calculated with
MODTRANTM and compared with the observations. These stratus situations are selected in
a data set covering the years from 2000 to 2005 with a method using data widely available at
national meteorological observing stations. For 18 single layer stratus situations the
shortwave radiation fluxes calculated with MODTRANTM are compared to surface
observations from the Payerne BSRN site and top of atmosphere (TOA) observations from
the Clouds and the Earth’s Radiant Energy System (CERES) experiment. A median bias on
the order of 20Wm-2 ( |
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