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van Hooijdonk, I.G.S. (author), Clercx, Herman J.H. (author), Ansorge, Cedrick (author), Moene, Arnold F. (author), van de Wiel, B.J.H. (author)We perform direct numerical simulation of the Couette flow as a model for the stable boundary layer. The flow evolution is investigated for combinations of the (bulk) Reynolds number and the imposed surface buoyancy flux. First, we establish what the similarities and differences are between applying a fixed buoyancy difference (Dirichlet) and...journal article 2018
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van der Linden, S.J.A. (author), Baas, P. (author), van Hooft, J.A. (author), van Hooijdonk, I.G.S. (author), Bosveld, Fred C. (author), van de Wiel, B.J.H. (author)Geostrophic wind speed data, derived from pressure observations, are used in combination with tower measurements to investigate the nocturnal stable boundary layer at Cabauw, the Netherlands. Since the geostrophic wind speed is not directly influenced by local nocturnal stability, it may be regarded as an external forcing parameter of the...journal article 2017
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van Hooijdonk, I.G.S. (author), Clercx, Herman J.H. (author), Abraham, Carsten (author), Holdsworth, Amber M. (author), Monahan, Adam H. (author), Vignon, Etienne (author), Moene, Arnold F. (author), Baas, P. (author), van de Wiel, B.J.H. (author)This study aims to find the typical growth rate of the temperature inversion during the onset of the stable boundary layer around sunset.The sunset transition is a very challenging period for numerical weather prediction, since neither accepted theories for the convective boundary layer nor those for the stable boundary layer appear to be...journal article 2017
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van de Wiel, B.J.H. (author), Vignon, Etienne (author), Baas, P. (author), van Hooijdonk, I.G.S. (author), van der Linden, S.J.A. (author), van Hooft, J.A. (author), Bosveld, Fred C. (author), de Roode, S.R. (author), Moene, Arnold F. (author), Genthon, Christophe (author)A conceptual model is used in combination with observational analysis to understand regime transitions of near-surface temperature inversions at night as well as in Arctic conditions. The model combines a surface energy budget with a bulk parameterization for turbulent heat transport. Energy fluxes or feedbacks due to soil and radiative heat...journal article 2017
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van Hooijdonk, I.G.S. (author), Moene, A. F. (author), Scheffer, M. (author), Clercx, H. J H (author), van de Wiel, B.J.H. (author)The evening transition is investigated in an idealized model for the nocturnal boundary layer. From earlier studies it is known that the nocturnal boundary layer may manifest itself in two distinct regimes, depending on the ambient synoptic conditions: strong-wind or overcast conditions typically lead to weakly stable, turbulent nights; clear...journal article 2017