Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 409979
Title Confronting the WRF and RAMS mesoscale models with innovative observations in the Netherlands-Evaluating the boundary-layer heat budget
Author(s) Steeneveld, G.J.; Tolk, L.; Moene, A.F.; Hartogensis, O.K.; Peters, W.; Holtslag, A.A.M.
Source Journal of Geophysical Research: Atmospheres 116 (2011). - ISSN 2169-897X - 16 p.
Department(s) Meteorology and Air Quality
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) large-eddy simulations - co2 mixing ratios - land-surface - sensible heat - contrasting nights - vertical diffusion - weather forecasts - transport models - regional-scale - diurnal cycles
Abstract The Weather Research and Forecasting Model (WRF) and the The Weather Research and Forecasting Model (WRF) and the Regional Atmospheric Mesoscale Model System (RAMS) are frequently used for (regional) weather, climate and air quality studies. This paper covers an evaluation of these models for a windy and calm episode against Cabauw tower observations (The Netherlands), with a special focus on the representation of the physical processes in the atmospheric boundary layer (ABL). In ad-dition, area averaged sensible heat flux observations by scintillometry are utilized which enables evaluation of grid scale model fluxes and flux observations at the same horizontal scale. Also, novel ABL height observations by ceilometry and of the near surface longwave radiation divergence are utilized. It appears that WRF in its basic set-up shows satisfactory model results for nearly all atmospheric near surface variables compared to field observations, while RAMS needed refining of its ABL scheme. An important inconsistency was found regarding the ABL daytime heat budget: Both model versions are only able to correctly forecast the ABL thermodynamic structure when the modeled surface sensible heat flux is much larger than both the eddy-covariance and scintillometer observations indicate. In order to clarify this discrepancy, model results for each term of the heat budget equation is evaluated against field observations. Sensitivity studies and evaluation of radiative tendencies and entrainment reveal that possible errors in these variables cannot explain the overestimation of the sensible heat flux within the current model infrastructure.
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