Transient Aggregation of Convection: Observed Behavior and Underlying Processes [PDF]
Journal of Climate, 2021 AbstractConvective self-aggregation is among the most striking features emerging from radiative–convective equilibrium simulations, but its relevance to convective disturbances observed in the real atmosphere remains under debate. This work seeks the observational signals of convective aggregation intrinsic to the life cycle of cloud clusters.
Masunaga, Hirohiko +4 more
openaire +5 more sources
Self-aggregation of clouds in conditionally unstable moist convection [PDF]
Proceedings of the National Academy of Sciences, 2011 The behavior of moist Rayleigh–Bénard convection is investigated using a Boussinesq model with a simplified thermodynamics for phase transitions. This idealized configuration makes the problem accessible to high-resolution three-dimensional direct numerical simulations without small-scale parameterizations of the turbulence for extended layers with ...
Olivier Pauluis, Jörg Schumacher
openalex +3 more sources
Theory of activated-rate processes under shear with application to shear-induced aggregation of colloids [PDF]
, 2009 Using a novel approximation scheme within the convective diffusion (two body Smoluchowski) equation framework, we unveil the shear-driven aggregation mechanism at the origin of structure-formation in sheared colloidal systems.
Gentili, Daniele +3 more
core +2 more sources
Boundary Layer Diabatic Processes, the Virtual Effect, and Convective Self‐Aggregation [PDF]
Journal of Advances in Modeling Earth Systems, 2018 Da Yang
openalex +3 more sources
Self‐Aggregation of Convection in Spatially Varying Sea Surface Temperatures
Journal of Advances in Modeling Earth Systems, 2020 The phenomenon of self‐aggregation of convection was first identified in convection‐permitting simulations of radiative convective equilibrium, characterized by homogeneous boundary conditions and in the absence of planetary rotation.
Sebastian K. Müller, Cathy Hohenegger
doaj +1 more source
Estimating Bulk Entrainment With Unaggregated and Aggregated Convection [PDF]
Geophysical Research Letters, 2018 AbstractTo investigate how entrainment is influenced by convective organization, we use the ICON (ICOsahedral Nonhydrostatic) model in a radiative‐convective equilibrium framework, with a 1 km spatial grid mesh covering a 600 by 520 km2 domain. We analyze two simulations, with unaggregated and aggregated convection, and find that, in the lower free ...
Tobias Becker +3 more
openaire +2 more sources
Scaling properties of velocity and temperature spectra above the surface friction layer in a convective atmospheric boundary layer [PDF]
, 2007 International audienceWe report velocity and temperature spectra measured at nine levels from 1.42 meters up to 25.7 m over a smooth playa in Western Utah. Data are from highly convective conditions when the magnitude of the Obukhov length (our proxy for
Clement, R. J. +2 more
core +3 more sources
Rain event properties at the source of the Blue Nile River [PDF]
, 2011 In the present study, spatial and temporal patterns of rain event properties are analysed. These event properties are rain event depth, event duration, mean event rain rate, peak rain rate and the time span between two consecutive rain events which is ...
Gebremichael, M. +4 more
core +3 more sources
Aggregation-based algebraic multigrid for convection-diffusion
, 2012 info:eu-repo/semantics ...
Yvan Notay
openalex +2 more sources
Convective self‐aggregation, cold pools, and domain size [PDF]
Geophysical Research Letters, 2013 Convective self‐aggregation refers to a phenomenon in cloud‐resolving simulations wherein the atmosphere spontaneously develops a circulation with a convecting moist patch and a nonconvecting dry patch. All previous studies have found a sharp transition to aggregated convection when the domain size exceeds a critical threshold, typically in the range ...
Nadir Jeevanjee, David M. Romps
openaire +3 more sources