Results 11 to 20 of about 197 (99)

Congestus Mode Invigoration by Convective Aggregation in Simulations of Radiative‐Convective Equilibrium

Journal of Advances in Modeling Earth Systems, 2022
This study examines how the congestus mode of tropical convection is expressed in numerical simulations of radiative‐convective equilibrium (RCE). We draw insights from the ensemble of cloud‐resolving models participating in the RCE Model Intercomparison
Adam B. Sokol, Dennis L. Hartmann
doaj   +3 more sources

The Diurnal Path to Persistent Convective Self‐Aggregation [PDF]

Journal of Advances in Modeling Earth Systems, 2022
Clustering of tropical thunderstorms constitutes an important climate feedback because it influences the radiative balance. Convective self‐aggregation (CSA) is a profound modeling paradigm for explaining the clustering of tropical oceanic thunderstorms.
Gorm G. Jensen, Romain Fiévet, Jan O. Haerter   +2 more
doaj   +5 more sources

Cloud‐Radiation Interactions and Their Contributions to Convective Self‐Aggregation [PDF]

Journal of Advances in Modeling Earth Systems, 2021
This study investigates the direct radiative‐convective processes that drive and maintain aggregation within convection‐permitting elongated channel (and smaller square) simulations of the UK Met Office Unified Model. Our simulations are configured using
Kieran N. Pope, Christopher E. Holloway, Todd R. Jones, Thorwald H. M. Stein   +3 more
doaj   +4 more sources

Forcing Convection to Aggregate Using Diabatic Heating Perturbations [PDF]

Journal of Advances in Modeling Earth Systems, 2021
Tropical deep convection can aggregate into large clusters, which can have impacts on the local humidity and precipitation. Sea surface temperature (SST) gradients have been shown to organize convection, yet there has been little work done to investigate
Beth Dingley, Guy Dagan, Philip Stier
doaj   +4 more sources

Quantifying Convective Aggregation Using the Tropical Moist Margin's Length [PDF]

Journal of Advances in Modeling Earth Systems, 2020
On small scales, the tropical atmosphere tends to be either moist or very dry. This defines two states that, on large scales, are separated by a sharp margin, well identified by the antimode of the bimodal tropical column water vapor distribution ...
Tom Beucler, David Leutwyler, Julia M. Windmiller   +2 more
doaj   +5 more sources

Circling in on Convective Self‐Aggregation [PDF]

Journal of Geophysical Research: Atmospheres, 2021
AbstractIn radiative‐convective equilibrium simulations, convective self‐aggregation (CSA) is the spontaneous organization into segregated cloudy and cloud‐free regions. Evidence exists for how CSA is stabilized, but how it arises favorably on large domains is not settled. Using large‐eddy simulations, we link the spatial organization emerging from the
Nissen, Silas Boye, Haerter, Jan O.
openaire   +3 more sources

Tipping to an Aggregated State by Mesoscale Convective Systems

Journal of Advances in Modeling Earth Systems
Radiative‐convective equilibrium simulations were suggested to resist self‐aggregation within a linearly stable regime at low surface temperatures. Recent numerical work shows that this linearly stable regime can rapidly transition to an aggregated state
I. L. Kruse, R. Fiévet, J. O. Haerter
doaj   +3 more sources

Sensitivity of Convective Self‐Aggregation to Subsidence

Journal of Advances in Modeling Earth Systems, 2022
AbstractSimulations using the convection‐permitting MesoNH model with imposed vertical motion document the influence of large‐scale circulation on convective self‐aggregation. Results show that subsidence favors self‐aggregation in this model and that this sensitivity includes a hysteresis: for weak subsidence, only one stationary state is found ...
Bellon, Gilles, Coppin, David
openaire   +1 more source

Distortions of the Rain Distribution With Warming, With and Without Self‐Aggregation

Journal of Advances in Modeling Earth Systems, 2021
We investigate how mesoscale circulations associated with convective aggregation can modulate the sensitivity of the hydrologic cycle to warming. We quantify changes in the full distribution of rain across radiative‐convective equilibrium states in a ...
Benjamin Fildier, William D. Collins, Caroline Muller   +2 more
doaj   +1 more source

A budget for the size of convective self‐aggregation [PDF]

Quarterly Journal of the Royal Meteorological Society, 2019
There is no consensus on the physical mechanisms controlling the scale at which convective activity organizes near the Equator. Here, we introduce a diagnostic framework relating the evolution of the length‐scale of convective aggregation to the net radiative heating, the surface enthalpy flux, and horizontal energy transport.
Tom Beucler, Timothy Cronin
openaire   +4 more sources