A preliminary evaluation of the necessity of using a cumulus parameterization scheme in high-resolution simulations of Typhoon Haiyan (2013)

2018 ◽  
Vol 92 (2) ◽  
pp. 647-671 ◽  
Author(s):  
Funing Li ◽  
Jinbao Song ◽  
Xia Li
Keyword(s):  
High Resolution ◽  
Cumulus Parameterization ◽  
Parameterization Scheme ◽  
Preliminary Evaluation ◽  
Cumulus Parameterization Scheme

Parameter Tuning and Calibration of RegCM3 with MIT–Emanuel Cumulus Parameterization Scheme over CORDEX East Asia Domain

2014 ◽  
Vol 27 (20) ◽  
pp. 7687-7701 ◽  
Author(s):  
Liwei Zou ◽  
Yun Qian ◽  
Tianjun Zhou ◽  
Ben Yang
Keyword(s):  
East Asia ◽  
Regional Climate ◽  
Cumulus Parameterization ◽  
Parameterization Scheme ◽  
Cumulus Parameterization Scheme ◽  
Convection Scheme ◽  
Total Rainfall ◽  
Low Level ◽  
Positive Effects ◽  
Cordex East Asia

Abstract In this study, the authors calibrated the performance of the Regional Climate Model, version 3 (RegCM3), with the Massachusetts Institute of Technology (MIT)–Emanuel cumulus parameterization scheme over the Coordinated Regional Climate Downscaling Experiment (CORDEX) East Asia domain by tuning seven selected parameters based on the multiple very fast simulated annealing (MVFSA) approach. The seven parameters were selected based on previous studies using RegCM3 with the MIT–Emanuel convection scheme. The results show the simulated spatial pattern of rainfall, and the probability density function distribution of daily rainfall rates is significantly improved in the optimal simulation. Sensitivity analysis suggests that the parameter relative humidity criteria (RHC) has the largest effect on the model results. Followed by an increase of RHC, an increase of total rainfall is found over the northern equatorial western Pacific, mainly contributed by the increase of explicit rainfall. The increases of the convergence of low-level water vapor transport and the associated increases in cloud water favor the increase of explicit rainfall. The identified optimal parameters constrained by total rainfall have positive effects on the low-level circulation and surface air temperature. Furthermore, the optimized parameters based on the chosen extreme case are transferable to a normal case and the model’s new version with a mixed convection scheme.

Implementation of a new cumulus parameterization scheme based on an explicit time-dependent tilting cloud model in ARPS model

2013 ◽  
Vol 122 (3-4) ◽  
pp. 145-158 ◽  
Author(s):  
Maryam Gharaylou ◽  
Peyman Zawar-Reza ◽  
Abbas-Ali A. Bidokhti ◽  
Majid-M. Farahani
Keyword(s):  
Cloud Model ◽  
Time Dependent ◽  
Cumulus Parameterization ◽  
Parameterization Scheme ◽  
Cumulus Parameterization Scheme

scholarly journals A Spectral Cumulus Parameterization Scheme Interpolating between Two Convective Updrafts with Semi-Lagrangian Calculation of Transport by Compensatory Subsidence

2015 ◽  
Vol 143 (2) ◽  
pp. 597-621 ◽  
Author(s):  
Hiromasa Yoshimura ◽  
Ryo Mizuta ◽  
Hiroyuki Murakami
Keyword(s):  
Atmospheric Model ◽  
Cumulus Parameterization ◽  
Parameterization Scheme ◽  
Natural Material ◽  
Layer By Layer ◽  
Cumulus Parameterization Scheme ◽  
Material Transport ◽  
Cumulus Scheme ◽  
Global Atmospheric Model ◽  
Lagrangian Scheme

Abstract The authors have developed a new spectral cumulus parameterization scheme that explicitly considers an ensemble of multiple convective updrafts by interpolating in-cloud variables between two convective updrafts with large and small entrainment rates. This cumulus scheme has the advantages that the variables in entraining and detraining convective updrafts are calculated in detail layer by layer as in the Tiedtke scheme, and that a spectrum of convective updrafts with different heights due to the difference in entrainment rates is explicitly represented, as in the Arakawa–Schubert scheme. A conservative and monotonic semi-Lagrangian scheme is used for calculation of transport by convection-induced compensatory subsidence. Use of the semi-Lagrangian scheme relaxes the mass-flux limit due to the Courant–Friedrichs–Lewy (CFL) condition, and moreover ensures nonnegative natural material transport. A global atmospheric model using this cumulus scheme gives an atmospheric simulation that agrees well with the observational climatology.

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