Author: Alan I. WeinsteinPublisher:
ISBN:
Category : Convective clouds
Languages : en
Pages : 59
Book Description
A Parameterized Numerical Model of Cumulus Convection
Author: Alan I. WeinsteinPublisher:
ISBN:
Category : Convective clouds
Languages : en
Pages : 59
Book Description
The Representation of Cumulus Convection in Numerical Models
Author: Kerry EmanuelPublisher: Springer
ISBN: 1935704133
Category : Science
Languages : en
Pages : 242
Book Description
This book presents descriptions of numerical models for testing cumulus in cloud fields. It is divided into six parts. Part I provides an overview of the problem, including descriptions of cumulus clouds and the effects of ensembles of cumulus clouds on mass, momentum, and vorticity distributions. A review of closure assumptions is also provided. A review of "classical" convection schemes in widespread use is provided in Part II. The special problems associated with the representation of convection in mesoscale models are discussed in Part III, along with descriptions of some of the commonly used mesoscale schemes. Part IV covers some of the problems associated with the representation of convection in climate models, while the parameterization of slantwise convection is the subject of Part V.
A Cumulus Convection Model Applied to Thunderstorm Rainfall in Arid Regions
Author: D. L. MorganPublisher:
ISBN:
Category : Arid regions
Languages : en
Pages : 32
Book Description
Numerical Experiments on the Relation Between Microphysics and Dynamics in Cumulus Convection
Author: Francis W. MurrayPublisher:
ISBN:
Category : Cumulus
Languages : en
Pages : 44
Book Description
A previous numerical model of cumulus growth that treated condensation but not precipitation is modified by the addition of a parameterized treatment of liquid-phase microphysics. This modification improves the realism of the results for several parameters, including maximum height of cloud growth, maximum liquid content, amount and distribution of temperature departure, cloud shape, and occurrence and strength of subcloud down-draft. It is found that one of the most important controlling features in cloud growth is the rate of evaporation of droplets. In particular, the introduction of a class of large particles with a relatively slow evaporation rate produces a smaller temperature deficit at the cloud summit, hence more vigorous cloud growth. (Author).
The Physics and Parameterization of Moist Atmospheric Convection
Author: R.K. SmithPublisher: Springer Science & Business Media
ISBN: 9401588287
Category : Science
Languages : en
Pages : 499
Book Description
An up-to-date summary of our understanding of the dynamics and thermodynamics of moist atmospheric convection, with a strong focus on recent developments in the field. The book also reviews ways in which moist convection may be parameterised in large-scale numerical models - a field in which there is still some controversy - and discusses the implications of convection for large-scale flow. Audience: The book is aimed at the graduate level and research meteorologists as well as scientists in other disciplines who need to know more about moist convection and its representation in numerical models.
Parameterization Of Atmospheric Convection (In 2 Volumes)
Author: Robert S PlantPublisher: World Scientific
ISBN: 1783266929
Category : Technology & Engineering
Languages : en
Pages : 1169
Book Description
Precipitating atmospheric convection is fundamental to the Earth's weather and climate. It plays a leading role in the heat, moisture and momentum budgets. Appropriate modelling of convection is thus a prerequisite for reliable numerical weather prediction and climate modelling. The current standard approach is to represent it by subgrid-scale convection parameterization.Parameterization of Atmospheric Convection provides, for the first time, a comprehensive presentation of this important topic. The two-volume set equips readers with a firm grasp of the wide range of important issues, and thorough coverage is given of both the theoretical and practical aspects. This makes the parameterization problem accessible to a wider range of scientists than before. At the same time, by providing a solid bottom-up presentation of convection parameterization, this set is the definitive reference point for atmospheric scientists and modellers working on such problems.Volume 1 of this two-volume set focuses on the basic principles: introductions to atmospheric convection and tropical dynamics, explanations and discussions of key parameterization concepts, and a thorough and critical exploration of the mass-flux parameterization framework, which underlies the methods currently used in almost all operational models and at major climate modelling centres. Volume 2 focuses on the practice, which also leads to some more advanced fundamental issues. It includes: perspectives on operational implementations and model performance, tailored verification approaches, the role and representation of cloud microphysics, alternative parameterization approaches, stochasticity, criticality, and symmetry constraints.
Monthly Weather Review
Author: Diagnostics for and Evaluations of New Physical Parameterization Schemes for Global NWP Models
Author: Chien-Hsiung YangPublisher:
ISBN:
Category : Atmospheric models
Languages : en
Pages : 284
Book Description
The procedures and results of a study undertaken to evaluate and assess the impacts of three new parameterization schemes for the GL global spectral model as a 3-4 day range forecast model are described. The tree parameterization schemes are one each for the boundary-layer physics, moist convection and heating due to solar and terrestrial radiations. These schemes are incorporated either singly or jointly into a rhomboidal-30, 12-layer global spectral model for four-day simulations using FGGE III- a data as input. Evaluation and assessment are made on the basis of two kinds of global statistics: mean and root-mean-square errors, and on their magnitudes and distributions. The statistics are generated for both the primary, that is, prognostic, variables, and supplementary variables such as zonal-mean and zonal-eddies energy densities. The new moist convection scheme has been found to increase convective activity significantly and maintain it throughout the four-day period. It also warms and dries the middle troposphere, but produces rainfall far in excess of the climatology. The radiation parameterization has been found to cool the atmosphere and reduce its specific humidity. It counterbalances enhanced heating and moistening brought about by the new boundary-layer and moist convection schemes and eliminates the systematic warming of the old model.
Diagnostics for and Evaluations of New Physical Parameterization Schemes for Global NWP Models
Author: Data Assimilation for Atmospheric, Oceanic and Hydrologic Applications (Vol. II)
Author: Seon Ki ParkPublisher: Springer Science & Business Media
ISBN: 3642350887
Category : Science
Languages : en
Pages : 736
Book Description
This book contains the most recent progress in data assimilation in meteorology, oceanography and hydrology including land surface. It spans both theoretical and applicative aspects with various methodologies such as variational, Kalman filter, ensemble, Monte Carlo and artificial intelligence methods. Besides data assimilation, other important topics are also covered including targeting observation, sensitivity analysis, and parameter estimation. The book will be useful to individual researchers as well as graduate students for a reference in the field of data assimilation.