NDLI: Impact of Turbulence Closures on Diurnal Temperature evolution for Clear Sky Situations Over Belgium

Content Provider	Springer Nature Link
Author	Brasseur, O. Gallée, H. Schayes, G. Tricot, C. De Ridder, K.
Copyright Year	1998
Abstract	The aim of this study is to quantify the impact of turbulence closure on the simulation of surface air temperature at screen height (1.5 m) over Belgium. The mesoscale model MAR (Modèle Atmosphérique Régional), developed at the Université catholique de Louvain, is used to examine one-dimensional situations. A new second-order closure (level 2.5) is implemented containing prognostic equations for all three velocity variances, and diagnostic or prognostic formulations for the dissipation. This closure is compared with first and one-and-a-half order closures. Idealized nearly-neutral and convective cases underline the differences between first and second-order closures, and between diagnostic and prognostic equations for the dissipation. The one-and-a-half and second-order closures give satisfying results, but the first-order closure produces generally less appropriate vertical diffusion. Observed clear sky and weak horizontal advection situations have shown the sensitivity of 24 h temperature evolution to the choice of the turbulent closure.
Starting Page	163
Ending Page	193
Page Count	31
File Format	PDF
ISSN	00068314
Journal	Boundary-Layer Meteorology
Volume Number	87
Issue Number	2
e-ISSN	15731472
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1998-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Meteorology/Climatology Atmospheric Protection/Air Quality Control/Air Pollution
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science

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