Results 21 to 30 of about 30,389 (290)

Stratosphere-troposphere transport in a numerical simulation of midlatitude convection [PDF]

, 2007
The transport of stratospheric air deep into the troposphere via convection is investigated numerically using the UK Met Office Unified Model. A convective system that formed on 27 June 2004 near southeast England, in the vicinity an upper level ...
Bryan, Davies, Edwards, Gray, Gray, Gregory, Griffiths, Holton, Jeffrey M. Chagnon, Koch, Lamarque, Lane, Lane, Lock, Maddox, Moustaoui, Mullendore, Randriambelo, Reid, Roberts, Sprenger, Stohl, Stohl, Suzanne L. Gray, Wirth   +24 more
core   +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

Global climate impacts of stochastic deep convection parameterization in the NCAR CAM5

Journal of Advances in Modeling Earth Systems, 2016
In this study, the stochastic deep convection parameterization of Plant and Craig (PC) is implemented in the Community Atmospheric Model version 5 (CAM5) to incorporate the stochastic processes of convection into the Zhang‐McFarlane (ZM) deterministic ...
Yong Wang, Guang J. Zhang
doaj   +1 more source

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

A new modelling framework for statistical cumulus dynamics [PDF]

, 2011
We propose a new modelling framework suitable for the description of atmospheric convective systems as a collection of distinct plumes. The literature contains many examples of models for collections of plumes in which strong simplifying assumptions are ...
Landau L. D., van Kampen N. G.
core   +2 more sources

Parameterization of Stochastically Entraining Convection Using Machine Learning Technique

Journal of Advances in Modeling Earth Systems, 2022
A stochastic mixing model with a machine learning technique is proposed for mass flux convection schemes. The model consists of the stochastic differential equations (SDEs) for the fractional entrainment rate, fractional detrainment rate, fractional ...
Jihoon Shin, Jong‐Jin Baik
doaj   +1 more source

Earth System Modeling 2.0: A Blueprint for Models That Learn From Observations and Targeted High-Resolution Simulations [PDF]

, 2017
Climate projections continue to be marred by large uncertainties, which originate in processes that need to be parameterized, such as clouds, convection, and ecosystems. But rapid progress is now within reach.
Lan, Shiwei, Schneider, Tapio, Stuart, Andrew, Teixeira, João   +3 more
core   +2 more sources

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