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The Influence of Sampling and Filtering on Measured Wind Gusts
Publisher: American Meteorological Society
Abstract: The theory by Rice for extreme value statistics is used to study the influence of filters in a wind measuring system on the measured gusts. An extension is made to discretely sampled data. Model results are compared with ...
Surface layer Similarity under Nonuniform Fetch Conditions
Publisher: American Meteorological Society
Abstract: This paper discusses the results of a surface-layer experiment near the Cabauw meteorological mast. We measured momentum, heat and moisture fluxes at two heights, namely, 3.5 and 22.5 m. The measurements also include the ...
Flux Parameterization over Land Surfaces for Atmospheric Models
Publisher: American Meteorological Society
Abstract: In this paper a summary is given of observations and modeling efforts on surface fluxes, carried out at Cabauw in The Netherlands and during MESOGERS-84 in the south of France. Emphasis is put on those aspects that are ...
A Proposed Structure for Coupling Tiled Surfaces with the Planetary Boundary Layer
Publisher: American Meteorological Society
Abstract: A generalized coupling is proposed between atmospheric models and surface schemes (land and ocean). A set of input and output variables is defined for this purpose in such a way that it can be used by many current and ...
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Publisher: American Meteorological Society
The Sensitivity of the ECMWF Model to the Parameterization of Evaporation from the Tropical Oceans
Publisher: American Meteorological Society
Abstract: Stimulated by the results of a simple SST anomaly experiment with the ECMWF forecast model, a study was carried out to examine the model parameterization of evaporation from the tropica] oceans. In earlier versions of the ...
Underestimation of Latent and Sensible Heat Fluxes above the Agulhas Current in NCEP and ECMWF Analyses
Publisher: American Meteorological Society
Abstract: The Agulhas Current is the major western boundary current of the Southern Hemisphere. South of Africa it retroflects back into the southwest Indian Ocean, transporting relatively warm water into the midlatitudes. Large ...
Impact of Some Simplifying Assumptions in the New ECMWF Surface Scheme
Publisher: American Meteorological Society
Abstract: Two simplifying assumptions adopted in the current ECMWF surface scheme are explored: a uniform skin temperature for all grid-box fractions with variable latent heat release and a fixed value of an effective heat conductivity ...
Stable Atmospheric Boundary Layers and Diurnal Cycles: Challenges for Weather and Climate Models
Publisher: American Meteorological Society
Abstract: sentation of the atmospheric boundary layer is an important part of weather and climate models and impacts many applications such as air quality and wind energy. Over the years, the performance in modeling 2-m temperature ...
The EarthCARE Satellite: The Next Step Forward in Global Measurements of Clouds, Aerosols, Precipitation, and Radiation
Publisher: American Meteorological Society
Abstract: he collective representation within global models of aerosol, cloud, precipitation, and their radiative properties remains unsatisfactory. They constitute the largest source of uncertainty in predictions of climatic change ...