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| Titel |
Precipitation patterns and anomalies over the Tibetan Plateau as resolved by the High Asia Reanalysis |
| VerfasserIn |
Fabien Maussion, Julia Curio, Roman Finkelnburg, Thomas Mölg, Dieter Scherer |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250082668
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| Zusammenfassung |
| Meteorological observations over the Tibetan Plateau are scarce. Existing data sets are
often of inadequate resolution and/or accuracy to study the complex processes that
occur on local to regional scales. Numerical Weather Prediction (NWP) models
can be used to reduce this problem by simulating precipitation fields and other
meteorological variables at a high spatio-temporal resolution. Longer time spans of
years to decades can be simulated by NWP models by successive model runs of
shorter periods - a method which can be described by the term “regional atmospheric
reanalysis”.
In this study we present the results of two series of simulations spanning a period of eleven
years (2001-2011): a simulation of 30 km resolution covering a domain including most parts
of central Asia, and a nested simulation of 10 km resolution for the Tibetan Plateau and
surroundings (High Asia).
The modeled precipitation and its variability at inter-annual and seasonal scale show a good
agreement with existing datasets (surface observations, satellite estimates). Moreover, this
physically based and consistent dataset adds new details not available currently:
representation of frozen precipitation, effects of topography, hourly resolution, and more. We
analyse the product’s added-value by selected examples, and describe High Asia’s last decade
precipitation climatology and spatio-temporal variability. Some remaining problems, such as
how to quantify the model accuracy in this complex region are also addressed. |
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