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Diagnosis of the Marine Low Cloud Simulation in the NCAR Community Earth System Model (CESM) and the NCEP Global Forecast System (GFS)-Modular Ocean Model v4 (MOM4) coupled model
We present a diagnostic analysis of the marine low cloud climatology simulated by two state-of-the-art coupled atmosphere-ocean models: the NCAR Community Earth System Model (CESM) and the NCEP Global Forecasting System (GFS). In both models, the shallow convection and boundary layer turbulence parameterizations have been recently updated: both models now use a mass-flux scheme for the parameterization of shallow convection, and a turbulence parameterization capable of handling Stratocumulus (Sc)-topped Planetary Boundary Layers (PBLs). For shallow convection, both models employ a convective trigger function based on the concept of convective inhibition and both include explicit convective overshooting/penetrative entrainment formulation. For Sc-topped PBL, both models treat explicitly turbulence mixing and cloud-top entrainment driven by cloud-top radiative cooling. Our focus is on the climatological transition from Sc to shallow Cumulus (Cu)-topped PBL in the subtropical eastern oceans. We show that in the CESM the coastal Sc-topped PBLs in the subtropical Eastern Pacific are well-simulated but the climatological transition from Sc to shallow Cu is too abrupt and happens too close to the coast. By contrast, in the GFS coupled simulation the coastal Sc amount and PBL depth are severely underestimated while the transition from Sc to shallow Cu is ³delayed² and offshore Sc cover is too extensive in the subtropical Eastern Pacific. We discuss the possible connections between such differences in the simulations and differences in the parameterizations of shallow convection and boundary layer turbulence in the two models.
Engineering modular diterpene biosynthetic pathways in Physcomitrella patens
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Taxila LBM: a parallel, modular lattice Boltzmann framework for simulating pore-scale flow in porous media
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Modular next generation fast-neutron detector for portal monitoring
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Modular motion control software development to support a versatile, low-cost aerosol jet platform for printed electronics
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Core design optimization and analysis of the Purdue Novel Modular Reactor (NMR-50)
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Optimal planning and modular infrastructure dynamic allocation for shale gas production
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Modeling and optimization of carbon-negative NGCC plant enabled by modular direct air capture
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GalSim: The modular galaxy image simulation toolkit
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Activity identification in modular construction using audio signals and machine learning
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Crosstalk and the Dynamical Modularity of Feed-Forward Loops in Transcriptional Regulatory Networks
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