995 resultados para 1995_01240200 CTD-49 4302105


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The use of hindcast climatic data is quite extended for multiple applications. However, this approach needs the support of a validation process to allow its drawbacks and, therefore, confidence levels to be assessed. In this work, the strategy relies on an hourly wind database resulting from a dynamical downscaling experiment, with a spatial resolution of 10 km, covering the Iberian Peninsula (IP), driven by the ERA40 reanalysis (1959–2001) extended by European Centre for Medium-Range Weather Forecast (ECMWF) analysis (2002–2007) and comprising two main steps. Initially, the skill of the simulation is evaluated comparing the quality-tested observational database (Lorente-Plazas et al., 2014) at local and regional scales. The results show that the model is able to portray the main features of the wind over the IP: annual cycles, wind roses, spatial and temporal variability, as well as the response to different circulation types. In addition, there is a significant added value of the simulation with respect to driving conditions, especially in regions with a complex orography. However, some problems are evident, the major drawback being the systematic overestimation of the wind speed, which is mainly attributed to a missrepresentation of frictional forces. The model skill is also lower along the Mediterranean coast and for the Pyrenees. In a second phase, the high spatio-temporal resolution of the pseudo-real wind database is used to explore the limitations of the observational database. It is shown that missing values do not affect the characterisation of the wind climate over the IP, while the length of the observational period (6 years) is sufficient for most regions, with only a few exceptions. The spatial distribution of the observational sampling schemes should be enhanced to improve the correct assessment of all IP wind regimes, particularly in some mountainous areas.

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Vorbesitzer: Isaak Markus Jost

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Vorbesitzer: Bartholomaeusstift Frankfurt am Main

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Ermanno Loevinson

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Welsch (Projektbearbeiter): Begründung der Auflösung der zweiten preußischen Kammer (26. April 1849). In den Anlagen Rechtfertigung der Verlegung und späteren Auflösung der Preußischen Nationalversammlung sowie der Oktroyierung einer Verfassung (9. November und 5. Dezember 1848) wie auch der Ablehnung der Kaiserkrone durch Friedrich Wilhelm IV. (3. und 28. April 1849)

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von Karl Jürgens

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Vorbesitzer: Familie Holzhausen (?); alte Signatur: Ms. Holzhausen 2; Akzessionsnummer: 5320/27

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Robert Eisler