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Effect of the Grell-Freitas Deep Convection Scheme in Quasi-Uniform and Variable-Resolution Aquaplanet CAM Simulations

Journal Article · · Journal of Advances in Modeling Earth Systems
DOI:https://doi.org/10.1029/2020ms002459· OSTI ID:1886642

The Grell-Freitas deep convection scheme (GF) has been implemented in the Community Atmosphere Model (CAM) with the nonhydrostatic Model for Prediction Across Scales (MPAS) dynamical core. Aquaplanet simulations have been performed with a global quasi-uniform resolution mesh with ~120 km grid spacing and a variable resolution mesh employing a circular refined region with ~30 km grid spacing centering at the equator and ~120 km elsewhere. GF produces overall patterns of the general circulations comparable to those of other aquaplanet experiments, including those produced using the default Zhang-McFarlane convection scheme (ZM) in CAM Version 5.4. GF alleviates the overestimated occurrence of weak intensity precipitation characteristic of ZM due to GF’s different closure methods and deep-convection trigger conditions. Compared to ZM, the GF characteristics of the equatorial Kelvin waves are closer to observations. GF also better simulates precipitation at variable resolution, with no unrealistic wave distortion by the refinement. Overall, GF shows less sensitivity of convective precipitation and heating/moistening tendencies to changes in horizontal resolution compared to ZM. However, vertically-overlapped total cloud fraction simulated with GF in the tropics is more sensitive to the resolution than ZM due to the larger resolution-sensitivity of high-level cloud fraction in the tropics.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1886642
Report Number(s):
PNNL-SA-163480
Journal Information:
Journal of Advances in Modeling Earth Systems, Journal Name: Journal of Advances in Modeling Earth Systems Journal Issue: 6 Vol. 14; ISSN 1942-2466
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

References (63)

Precipitation characteristics of CAM5 physics at mesoscale resolution during MC3E and the impact of convective timescale choice journal December 2014
Reference aquaplanet climate in the C ommunity A tmosphere M odel, V ersion 5 journal January 2016
Stochastic convective parameterization improving the simulation of tropical precipitation variability in the NCAR CAM5: STOCHASTIC CONVECTIVE PARAMETERIZATION journal June 2016
Sensitivity of U.S. summer precipitation to model resolution and convective parameterizations across gray zone resolutions: Sensitivity Across Gray Zone Resolutions journal March 2017
Exploring the impacts of physics and resolution on aqua-planet simulations from a nonhydrostatic global variable-resolution modeling framework: IMPACTS OF PHYSICS AND RESOLUTION journal November 2016
Representing subgrid convective initiation in the C ommunity E arth S ystem M odel journal July 2017
Impact of Physics Parameterization Ordering in a Global Atmosphere Model journal February 2018
The Roles of Convection Parameterization in the Formation of Double ITCZ Syndrome in the NCAR CESM: I. Atmospheric Processes journal March 2018
Regional Climate Simulations With the Community Earth System Model journal June 2018
The effect of time steps and time-scales on parametrization suites journal August 2012
An efficient and accurate correlated-k parameterization of infrared radiative transfer for troposphere–stratosphere–mesosphere GCMs journal July 2000
The role of the convective ?trigger function? in numerical forecasts of mesoscale convective systems journal January 1992
Eddy fluxes and sensitivity of the water cycle to spatial resolution in idealized regional aquaplanet model simulations journal June 2013
A multimodel intercomparison of resolution effects on precipitation: simulations and theory journal February 2016
A multiresolution method for climate system modeling: application of spherical centroidal Voronoi tessellations journal November 2008
Numerical representation of geostrophic modes on arbitrarily structured C-grids journal December 2009
A unified approach to energy conservation and potential vorticity dynamics for arbitrarily-structured C-grids journal May 2010
Impact of the convection triggering function on single-column model simulations journal June 2000
Convective quasi-equilibrium in midlatitude continental environment and its effect on convective parameterization journal January 2002
A generalized approach to parameterizing convection combining ensemble and data assimilation techniques: PARAMETERIZING CONVECTION COMBINING ENSEMBLE AND DATA ASSIMILATION TECHNIQUES journal July 2002
A modified formulation of fractional stratiform condensation rate in the NCAR Community Atmospheric Model (CAM2) journal January 2003
Radiative forcing by long-lived greenhouse gases: Calculations with the AER radiative transfer models journal January 2008
Dreary state of precipitation in global models: MODEL AND OBSERVED PRECIPITATION journal December 2010
Assessing the Grell‐Freitas Convection Parameterization in the NASA GEOS Modeling System journal June 2018
Precipitation Characteristics in the Community Atmosphere Model and Their Dependence on Model Physics and Resolution journal July 2019
Radiative transfer for inhomogeneous atmospheres: RRTM, a validated correlated-k model for the longwave journal July 1997
Sensitivity of climate simulations to the parameterization of cumulus convection in the Canadian climate centre general circulation model journal September 1995
Convergence of aqua-planet simulations with increasing resolution in the Community Atmospheric Model, Version 3 journal January 2008
Centroidal Voronoi Tessellations: Applications and Algorithms journal January 1999
Interaction of a Cumulus Cloud Ensemble with the Large-Scale Environment, Part I journal April 1974
Further Studies of the Parameterization of the Influence of Cumulus Convection on Large-Scale Flow journal July 1974
Mesoscale Unsaturated Downdrafts Driven by Rainfall Evaporation: A Numerical Study journal February 1979
Simulation of Tropical Convective Systems. Part I: A Cumulus Parameterization journal December 1987
Convectively Coupled Equatorial Waves: Analysis of Clouds and Temperature in the Wavenumber–Frequency Domain journal February 1999
A Stochastic Parameterization for Deep Convection Based on Equilibrium Statistics journal January 2008
Effects of Convective Momentum Transport on the Atmospheric Circulation in the Community Atmosphere Model, Version 3 journal April 2008
A New Two-Moment Bulk Stratiform Cloud Microphysics Scheme in the Community Atmosphere Model, Version 3 (CAM3). Part I: Description and Numerical Tests journal August 2008
The Impact of Convection on ENSO: From a Delayed Oscillator to a Series of Events journal November 2008
A New Moist Turbulence Parameterization in the Community Atmosphere Model journal June 2009
The University of Washington Shallow Convection and Moist Turbulence Schemes and Their Impact on Climate Simulations with the Community Atmosphere Model journal June 2009
Evaluation of the HOMME Dynamical Core in the Aquaplanet Configuration of NCAR CAM4: Rainfall journal August 2011
Representing Equilibrium and Nonequilibrium Convection in Large-Scale Models journal February 2014
Exploring a Global Multiresolution Modeling Approach Using Aquaplanet Simulations journal April 2013
Metrics and Diagnostics for Precipitation-Related Processes in Climate Model Short-Range Hindcasts journal March 2013
Exploratory High-Resolution Climate Simulations using the Community Atmosphere Model (CAM) journal May 2014
Evaluation of Trigger Functions for Convective Parameterization Schemes Using Observations journal October 2014
Aquaplanet Experiments Using CAM’s Variable-Resolution Dynamical Core journal July 2014
Integrating Cloud Processes in the Community Atmosphere Model, Version 5 journal September 2014
Advanced Two-Moment Bulk Microphysics for Global Models. Part I: Off-Line Tests and Comparison with Other Schemes journal February 2015
An Explanation for the Sensitivity of the Mean State of the Community Atmosphere Model to Horizontal Resolution on Aquaplanets journal July 2017
A Multiscale Nonhydrostatic Atmospheric Model Using Centroidal Voronoi Tesselations and C-Grid Staggering journal September 2012
Error Characteristics of Two Grid Refinement Approaches in Aquaplanet Simulations: MPAS-A and WRF journal September 2013
Analyzing the Grell–Freitas Convection Scheme from Hydrostatic to Nonhydrostatic Scales within a Global Model journal May 2016
Physics–Dynamics Coupling in Weather, Climate, and Earth System Models: Challenges and Recent Progress journal November 2018
The simulation of the diurnal cycle of convective precipitation over land in a global model journal October 2004
Context and Aims of the Aqua-Planet Experiment journal January 2013
The Aqua-Planet Experiment (APE): CONTROL SST Simulation journal January 2013
Convection and waves on Small Earth and Deep Atmosphere journal June 2015
Toward unification of the multiscale modeling of the atmosphere journal January 2011
A scale and aerosol aware stochastic convective parameterization for weather and air quality modeling journal January 2014
Impact of scale-aware deep convection on the cloud liquid and ice water paths and precipitation using the Model for Prediction Across Scales (MPAS-v5.2) journal June 2020
A moist aquaplanet variant of the Held–Suarez test for atmospheric model dynamical cores journal January 2016
Description and evaluation of a new four-mode version of the Modal Aerosol Module (MAM4) within version 5.3 of the Community Atmosphere Model journal January 2016

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