Results 21 to 30 of about 1,744 (240)

A Parameterization of Convective Dust Storms for Models with Mass-Flux Convection Schemes [PDF]

Journal of the Atmospheric Sciences, 2015
Abstract Cold pool outflows, generated by downdrafts from moist convection, can generate strong winds and therefore uplift of mineral dust. These so-called haboob convective dust storms occur over all major dust source areas worldwide and contribute substantially to emissions in northern Africa, the world’s largest source.
Pantillon, F., Knippertz, P., Marsham, J. H., Birch, C. E.   +3 more
openaire   +3 more sources

Evaluating a lightning parameterization based on cloud-top height for mesoscale numerical model simulations [PDF]

Geoscientific Model Development, 2013
The Price and Rind lightning parameterization based on cloud-top height is a commonly used method for predicting flash rate in global chemistry models.
J. Wong, M. C. Barth, D. Noone
doaj   +1 more source

Entrainment Parameterization in Convective Boundary Layers

Journal of the Atmospheric Sciences, 1999
Abstract Various runs were performed with a large eddy simulation (LES) model to evaluate different types of entrainment parametrizations. For this evaluation, three types of boundary layers were simulated: a clear convective boundary layer (CBL), a boundary layer containing a smoke concentration, and a cloud-topped boundary layer. It is shown that the
van Zanten, M.C., Duynkerke, P.G., Cuijpers, J.W.M.   +2 more
openaire   +2 more sources

A Cloud Model to Parameterize Convection [PDF]

Journal of Applied Meteorology, 1973
Abstract This paper describes a parameterization of convection developed for use with a multi-level primitive equation model of the atmosphere. This parameterization is similar in form to that of Kuo, who postulates that boundary layer air rises moist adiabatically before mixing with the large-scale flow.
A. A. Barker, W. R. Kininmonth
openaire   +1 more source

Evaluation of Optimized WRF Precipitation Forecast over a Complex Topography Region during Flood Season

Atmosphere, 2016
In recent years, the Weather Research and Forecast (WRF) model has been utilized to generate quantitative precipitation forecasts with higher spatial and temporal resolutions.
Yuan Li, Guihua Lu, Zhiyong Wu, Hai He, Jun Shi, Yuexiong Ma, Shichuang Weng   +6 more
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A Convection Parameterization for Low-CAPE Environments [PDF]

Monthly Weather Review, 2020
AbstractNumerical models that are unable to resolve moist convection in the atmosphere employ physical parameterizations to represent the effects of the associated processes on the resolved-scale state. Most of these schemes are designed to represent the dominant class of cumulus convection that is driven by latent heat release in a conditionally ...
Ron McTaggart-Cowan, Paul A. Vaillancourt, Leo Separovic, Shawn Corvec, Ayrton Zadra   +4 more
openaire   +1 more source

Can We Use 1D Models to Predict 3D Model Response to Forcing in an Idealized Framework?

Journal of Advances in Modeling Earth Systems, 2022
Single‐column models (SCMs) simulations are sometimes used to evaluate model physics and aid parameterization development. However, few studies have systematically compared SCM behavior—where column boundary conditions are specified—with that of ...
Y.‐L. Hwong, S. C. Sherwood, D. Fuchs
doaj   +1 more source

The Impact of Parameterized Convection on the Simulation of Crop Processes [PDF]

Journal of Applied Meteorology and Climatology, 2015
AbstractGlobal climate and weather models are a key tool for the prediction of future crop productivity, but they all rely on parameterizations of atmospheric convection, which often produce significant biases in rainfall characteristics over the tropics. The authors evaluate the impact of these biases by driving the General Large Area Model for annual
García Carreras, L., Challinor, Andrew J., Parkes BJ, Birch CE, Nicklin KJ, Parker DJ   +5 more
openaire   +4 more sources

Evaluation of Lightning Forecasting Based on One Lightning Parameterization Scheme and Two Diagnostic Methods

Atmosphere, 2018
Lightning forecasting is a vital item in server convective system short-time forecasting. However, lightning parameterization in mesoscale numerical prediction models is still in its early stages of development. Several lightning parameterization schemes
Ying Wang, Yi Yang, Shuanglong Jin
doaj   +1 more source

A unified parameterization of clouds and turbulence using CLUBB and subcolumns in the Community Atmosphere Model [PDF]

Geoscientific Model Development, 2015
Most global climate models parameterize separate cloud types using separate parameterizations. This approach has several disadvantages, including obscure interactions between parameterizations and inaccurate triggering of cumulus parameterizations ...
K. Thayer-Calder, A. Gettelman, C. Craig, S. Goldhaber, P. A. Bogenschutz, C.-C. Chen, H. Morrison, J. Höft, E. Raut, B. M. Griffin, J. K. Weber, V. E. Larson, M. C. Wyant, M. Wang, Z. Guo, S. J. Ghan   +15 more
doaj   +1 more source