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Comparison of Meso-Scale Modelled Fluxes and Measurements

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Book cover Energy and Matter Fluxes of a Spruce Forest Ecosystem

Part of the book series: Ecological Studies ((ECOLSTUD,volume 229))

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Abstract

The Weather Research and Forecasting model was evaluated over a forested and a grassland ecosystem. The model run was initialized with three nested domains and the second Intensive Observation Period (IOP2) of the EGER-Project (ExchanGE processes in mountainous Regions) in June/July 2008 was simulated.

To evaluate the model, mean bias error, root mean square error, mean average error, index of agreement and coefficient of efficiency were calculated for the whole period of the IOP2 as well as for each single day. These difference measures were calculated with the “nearest” grid point and with an “interpolated” grid point. Pressure and wind direction were evaluated with their absolute values.

It was proved that the least domain provided better results for five of six meteorological parameters: temperature, wind speed, wind direction, global radiation, sensible and latent heat flux. This shows that a resolution of 1 km in space and half an hour in time makes sense. Furthermore, differences in model results and measured values caused by micrometeorological phenomena (e.g. cold-air flowing off mountains or mountain-valley—wind-systems) could be shown. These micrometeorological phenomena could not be simulated because the resolution of the terrestrial input is too low. The more accurate terrestrial input can lead to better forecast results. Furthermore, large-scale weather patterns have an influence on the forecast. A comparison of the statistical parameters calculated with “interpolated” or “nearest” methods showed that there is no significant difference between them.

A. Serafimovich and C. Thieme: Affiliation during the work at the Waldstein sites- Department of Micrometeorology, University of Bayreuth, Bayreuth, Germany

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Authors and Affiliations

  1. Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473, Potsdam, Germany

    Andrei Serafimovich

  2. Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Biochemical Plant Pathology, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany

    Christoph Thieme

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  1. Andrei Serafimovich
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  2. Christoph Thieme
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Correspondence to Andrei Serafimovich .

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Editors and Affiliations

  1. Bayreuth Center of Ecology and Environmental Research (BayCEER), Universität Bayreuth, Bayreuth, Germany

    Thomas Foken

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Serafimovich, A., Thieme, C. (2017). Comparison of Meso-Scale Modelled Fluxes and Measurements. In: Foken, T. (eds) Energy and Matter Fluxes of a Spruce Forest Ecosystem. Ecological Studies, vol 229. Springer, Cham. https://doi.org/10.1007/978-3-319-49389-3_18

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