Results 21 to 30 of about 1,864 (260)

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 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

Effects of Organized Convection Parameterization on the MJO and Precipitation in E3SMv1. Part I: Mesoscale Heating

Journal of Advances in Modeling Earth Systems, 2021
Mesoscale organization of convection is typically not represented in global circulation models, and hence its influence on the global circulation is not accounted for. The heating component of a parameterization that represents the dynamical and physical
C.‐C. Chen, J. H. Richter, C. Liu, M. W. Moncrieff, Q. Tang, W. Lin, S. Xie, P. J. Rasch   +7 more
doaj   +1 more source

Impact of Interactive Vertical Overlap of Cumulus and Stratus on Global Aerosol, Precipitation, and Radiation Processes in the Seoul National University Atmosphere Model Version 0 With a Unified Convection Scheme (SAM0‐UNICON)

Journal of Advances in Modeling Earth Systems, 2019
The previously proposed parameterization for the integrated vertical overlap of cumulus and stratus is generalized to handle both conventional exponential‐random stratus overlap and nonconventional (i.e., other than exponential‐random) cumulus overlap in
Sungsu Park, Eunsil Oh, Siyun Kim, Jihoon Shin   +3 more
doaj   +1 more source

Improvement in the Modeled Representation of North American Monsoon Precipitation Using a Modified Kain–Fritsch Convective Parameterization Scheme

Atmosphere, 2018
A commonly noted problem in the simulation of warm season convection in the North American monsoon region has been the inability of atmospheric models at the meso-β scales (10 s to 100 s of kilometers) to simulate organized convection, principally ...
Thang M. Luong, Christopher L. Castro, Truong M. Nguyen, William W. Cassell, Hsin-I Chang   +4 more
doaj   +1 more source

Characterizing Convection Schemes Using Their Responses to Imposed Tendency Perturbations

Journal of Advances in Modeling Earth Systems, 2021
Convection is usually parameterized in global climate models, and there are often large discrepancies between results obtained with different convection schemes.
Y. L. Hwong, S. Song, S. C. Sherwood, A. J. Stirling, C. Rio, R. Roehrig, C. L. Daleu, R. S. Plant, D. Fuchs, P. Maher, L. Touzé‐Peiffer   +10 more
doaj   +1 more source

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

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

The Impact of Parameterized Convection on Climatological Precipitation in Atmospheric Global Climate Models

Geophysical Research Letters, 2018
Convective parameterizations are widely believed to be essential for realistic simulations of the atmosphere. However, their deficiencies also result in model biases.
Penelope Maher, Geoffrey K. Vallis, Steven C. Sherwood, Mark J. Webb, Philip G. Sansom   +4 more
doaj   +1 more source

Evaluation of the Plant–Craig stochastic convection scheme (v2.0) in the ensemble forecasting system MOGREPS-R (24 km) based on the Unified Model (v7.3) [PDF]

Geoscientific Model Development, 2016
The Plant–Craig stochastic convection parameterization (version 2.0) is implemented in the Met Office Regional Ensemble Prediction System (MOGREPS-R) and is assessed in comparison with the standard convection scheme with a simple stochastic scheme only ...
R. J. Keane, R. S. Plant, W. J. Tennant
doaj   +1 more source