Search Results - "Shima, Shin‐Ichiro"
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Confronting the Challenge of Modeling Cloud and Precipitation Microphysics
Published in Journal of advances in modeling earth systems (01-08-2020)“…In the atmosphere, microphysics refers to the microscale processes that affect cloud and precipitation particles and is a key linkage among the various…”
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MODELING OF CLOUD MICROPHYSICS: Can We Do Better?
Published in Bulletin of the American Meteorological Society (01-04-2019)“…Representation of cloud microphysics is a key aspect of simulating clouds. From the early days of cloud modeling, numerical models have relied on an Eulerian…”
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Parameterization and Explicit Modeling of Cloud Microphysics: Approaches, Challenges, and Future Directions
Published in Advances in atmospheric sciences (01-05-2023)“…Cloud microphysical processes occur at the smallest end of scales among cloud-related processes and thus must be parameterized not only in large-scale global…”
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Numerical Convergence of Shallow Convection Cloud Field Simulations: Comparison Between Double‐Moment Eulerian and Particle‐Based Lagrangian Microphysics Coupled to the Same Dynamical Core
Published in Journal of advances in modeling earth systems (01-07-2018)“…The sensitivity of simulated nonprecipitating cumulus clouds to grid length was investigated using a large‐eddy simulation model coupled to a particle‐based…”
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Overcoming computational challenges to realize meter- to submeter-scale resolution in cloud simulations using the super-droplet method
Published in Geoscientific Model Development (02-11-2023)“…A particle-based cloud model was developed for meter- to submeter-scale-resolution simulations of warm clouds. Simplified cloud microphysics schemes have…”
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Predicting the morphology of ice particles in deep convection using the super-droplet method: development and evaluation of SCALE-SDM 0.2.5-2.2.0, -2.2.1, and -2.2.2
Published in Geoscientific Model Development (08-09-2020)“…The super-droplet method (SDM) is a particle-based numerical scheme that enables accurate cloud microphysics simulation with lower computational demand than…”
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A grid refinement study of trade wind cumuli simulated by a Lagrangian cloud microphysical model: the super‐droplet method
Published in Atmospheric science letters (01-09-2017)“…The impact of spatial resolution on the simulation of trade wind cumuli was investigated. The super‐droplet method, an efficient stochastic Lagrangian cloud…”
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Response of high-altitude clouds to the galactic cosmic ray cycles in tropical regions
Published in Frontiers in earth science (Lausanne) (19-07-2023)“…Galactic cosmic rays are one of the possible mediators of the solar influence on climate. However, the impacts of GCR on clouds and climate systems are not…”
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NHM-Chem, the Japan Meteorological Agency's Regional Meteorology – Chemistry Model: Model Evaluations toward the Consistent Predictions of the Chemical, Physical, and Optical Properties of Aerosols
Published in Journal of the Meteorological Society of Japan (2019)“…The model performance of a regional-scale meteorology-chemistry model (NHM-Chem) has been evaluated for the consistent predictions of the chemical, physical,…”
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Comparison of three aerosol representations of NHM-Chem (v1.0) for the simulations of air quality and climate-relevant variables
Published in Geoscientific Model Development (30-04-2021)“…This study provides comparisons of aerosol representation methods incorporated into a regional-scale nonhydrostatic meteorology–chemistry model (NHM-Chem)…”
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Non-Gaussian data assimilation of satellite-based leaf area index observations with an individual-based dynamic global vegetation model
Published in Nonlinear processes in geophysics (06-09-2017)“…We developed a data assimilation system based on a particle filter approach with the spatially explicit individual-based dynamic global vegetation model…”
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Preliminary evaluation of the effect of electro-coalescence with conducting sphere approximation on the formation of warm cumulus clouds using SCALE-SDM version 0.2.5–2.3.0
Published in Geoscientific Model Development (12-09-2024)“…The phenomenon of electric fields applied to droplets, inducing droplet coalescence, is called the electro-coalescence effect. An analytic expression for…”
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Simulation of marine stratocumulus using the super-droplet method: numerical convergence and comparison to a double-moment bulk scheme using SCALE-SDM 5.2.6-2.3.1
Published in Geoscientific Model Development (05-07-2024)“…The super-droplet method (SDM) is a Lagrangian particle-based numerical scheme for cloud microphysics. In this work, a series of simulations based on the…”
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On the CCN (de)activation nonlinearities
Published in Nonlinear processes in geophysics (05-09-2017)“…We take into consideration the evolution of particle size in a monodisperse aerosol population during activation and deactivation of cloud condensation nuclei…”
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Rotating Spirals without Phase Singularity in Reaction-Diffusion Systems
Published in Progress of theoretical physics. Supplement (01-01-2003)“…Rotating spiral waves without phase singularity are found to arise in a certain class of three-component reaction-diffusion systems of biological relevance. It…”
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Rotating spiral waves with phase-randomized core in nonlocally coupled oscillators
Published in Physical review. E, Statistical, nonlinear, and soft matter physics (01-03-2004)“…Rotating spiral waves with a central core composed of phase-randomized oscillators can arise in reaction-diffusion systems if some of the chemical components…”
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Various oscillation patterns in phase models with locally attractive and globally repulsive couplings
Published in Physical review. E, Statistical, nonlinear, and soft matter physics (28-10-2015)“…We investigate a phase model that includes both locally attractive and globally repulsive coupling in one dimension. This model exhibits nontrivial…”
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Mean-Field Theory Revives in Self-Oscillatory Fields with Non-Local Coupling
Published in Progress of theoretical physics. Supplement (01-01-2006)“…A simple mean-field idea is applicable to the pattern dynamics of large assemblies of limit-cycle oscillators with non-local coupling. This is demonstrated by…”
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Particle filter data assimilation for ubiquitous unstable trajectories of two-dimensional three-state cellular automata
Published in Nonlinear dynamics (01-12-2024)“…Estimating the states of error-growing (sensitive to initial state) cellular automata (CA) based on noisy imperfect data is challenging due to the discreteness…”
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On the CCN [de]activation nonlinearities
Published 02-10-2016“…Nonlin. Processes Geophys., 24, 535-542, 2017 We take into consideration the evolution of particle size in a monodisperse aerosol population during activation…”
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