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| Titel |
Mapping the Surface Radiation Budget with Satellite Data |
| VerfasserIn |
E. Raschke, S. Kinne |
| 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 |
250020720
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| Zusammenfassung |
| The regional and global distribution of all radiation budget components (e.g. solar and infrared broadband fluxes at the surface and the top of the atmosphere (ToA) under clear-sky and all-sky conditions) are an important aspect in the validation of cloud-properties and cloud processes in global modeling. An important and commonly applied reference form satellite-sensor based data-sets. For surface fluxes, however, satellite radiance data cannot be directly converted into broadband surface fluxes and – although constrained by ToA radiances –
need to apply ancillary data and models. And inaccuracies and inconsistencies of these adopted data or models quickly propagate into derived (surface) radiative flux products.
Radiation product time-series of the three major projects ISCCP, GEWEX-SRB and CERES were compared. Significant inconsistencies were identified. Some of them can be traced to differences in ancillary data in atmosphere (e.g. aerosol, trace-gases, cloud properties) and at the surface (e.g. reflectance, temperature). These inconsistencies often exceed any accepted maximum error (of ±15 Wm-2) so that meaningful trend-analyses are difficult to impossible.
Therefore, we urge to examine and unify all ancillary data prior to any re-analysis effort. |
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