000005247 001__ 5247
000005247 005__ 20210131141959.0
000005247 0247_ $$2DOI$$a/10.1016/ j.atmosres.2020.105381
000005247 037__ $$aSCART-2021-0045
000005247 100__ $$aTemel, Orkun
000005247 245__ $$aLarge eddy simulations of the Martian convective boundary layer: Towards developing a new planetary boundary layer scheme
000005247 260__ $$c2021
000005247 520__ $$aThe grid resolutions typically employed in atmospheric global circulation and mesoscale models are not sufficient to explicitly resolve the turbulence processes within the planetary boundary layer (PBL). turbulent fluxes are, therefore, fully parameterized in those models, based on empirical relationships for the mixing length scale using PBL schemes. However, microscale models use the large-eddy simulation (LES) technique to resolve turbulence processes. Here, we perform LES computations for the daytime Martian planetary boundary layer, ranging from weakly to strong convective conditions, using the Mars implementation of planetWRF, the MarsWRF model. In this study, our main focus is to investigate the turbulence statistics and turbulent spectrum utilizing our LES results. Then, using the computed turbulence kinetic energy and its dissipation rate, a generic formulation for the mixing length scale variation in the Martian convective boundary layer is proposed. This mixing length formulation is used to derive a Mars-specific PBL scheme and its performance is compared to the PBL scheme currently in use by the MarsWRF model, the MRF scheme. The proposed scheme is tested both in global and mesoscale simulations, which are used to evaluate the convective boundary layer height and near-surface meteorology conditions at the InSight landing site. The presently proposed PBL scheme results in an improved prediction of convective boundary layer height that agree better with the observational estimations acquired by radio occultations of Mars Express in comparison to the MRF scheme. Also, the prediction of near-surface winds at the InSight landing site is slightly improved.
000005247 594__ $$aNO
000005247 700__ $$aSenel, Cem
000005247 700__ $$aPorchetta, Sara 
000005247 700__ $$aMuñoz- Esparza,  Domingo 
000005247 700__ $$aMischna,  Michael A. 
000005247 700__ $$aVan Hoolst, Tim 
000005247 700__ $$avan Beeck, Tim 
000005247 700__ $$aKaratekin, Ozgur
000005247 773__ $$pAtmospheric Research $$vVolume 250$$y2021
000005247 8560_ $$fozgur.karatekin@observatoire.be
000005247 85642 $$ahttps://www.sciencedirect.com/science/article/pii/S0169809520313181?via%3Dihub
000005247 905__ $$apublished in
000005247 980__ $$aREFERD