# Linear effects of the nontraditional Coriolis terms on ITCZ-forced large-scale flow

@article{Ong2019LinearEO, title={Linear effects of the nontraditional Coriolis terms on ITCZ-forced large-scale flow}, author={H. Ong and P. Roundy}, journal={arXiv: Atmospheric and Oceanic Physics}, year={2019} }

This paper promotes a measure to validate the hydrostatic approximation via scaling the nontraditional Coriolis term (NCT) in the zonal momentum equation. To demonstrate the scaling, this study simulates large-scale flow forced by a prescribed heat source mimicking the intertropical convergence zone (ITCZ) using a linearized forced-dissipative model. The model solves two similar equations between which the only difference is inclusion of NCTs. The equations are derived using the following… Expand

#### 4 Citations

The Nontraditional Coriolis Terms and Tropical Convective Clouds

- Geology
- 2020

The full, three-dimensional Coriolis force includes the familiar sine-of-latitude terms as well as frequently dropped cosine-of-latitude terms [nontraditional Coriolis terms (NCT)]. The latter are… Expand

Nontraditional hypsometric equation

- Geology, Physics
- 2019

This study corrects the hypsometric equation by restoring the nontraditional terms to relax the hydrostatic approximation. The nontraditional terms include one Coriolis term and two metric terms in… Expand

A Fully Compressible Nonhydrostatic Deep-Atmosphere Equations Solver for MPAS

- Geology
- 2021

A solver for the nonhydrostatic deep-atmosphere equations of motion is described that extends the capabilities of the Model for Prediction Across Scales-Atmosphere (MPAS-A) beyond the existing… Expand

The Compressional Beta Effect: Analytical Solution, Numerical Benchmark, and Data Analysis

- Geology, Physics
- 2020

This study derives a complete set of equatorially confined wave solutions from an anelastic equation set with the complete Coriolis terms, which include both the vertical and meridional planetary… Expand

#### References

SHOWING 1-10 OF 38 REFERENCES

The Importance of the Nontraditional Coriolis Terms in Large-Scale Motions in the Tropics Forced by Prescribed Cumulus Heating

- Physics
- 2012

AbstractIn meteorological dynamics, the shallow-atmosphere approximation is generally used in the momentum equation, together with the “traditional approximation.” In the traditional approximation,… Expand

Dynamically consistent, quasi-hydrostatic equations for global models with a complete representation of the Coriolis force

- Mathematics
- 1995

The spherical polar components of the Coriolis force consist of terms in sin ϕ and terms in cos ϕ, where ϕ is latitude (referred to the frame-rotation vector as polar axis). The cos ϕ Coriolis terms… Expand

Response of idealized Hadley circulations to seasonally varying heating

- Geology
- 2005

[1] The response of Hadley circulations to displacements of the latitude of maximum heating is investigated in idealized axisymmetric and eddy-permitting models. Consistent with an earlier study and… Expand

Symmetric Stability of Compressible Zonal Flows on a Generalized Equatorial β Plane

- Physics
- 2008

Abstract Sufficient conditions are derived for the linear stability with respect to zonally symmetric perturbations of a steady zonal solution to the nonhydrostatic compressible Euler equations on an… Expand

The Double-ITCZ Syndrome in Coupled General Circulation Models: The Role of Large-Scale Vertical Circulation Regimes

- Geology
- 2010

The double‐intertropical convergence zone (DI) systematic error, affecting state-of-the-art coupled general circulation models (CGCMs), is examined in the multimodel Intergovernmental Panel on… Expand

A Scale Analysis of Deep Moist Convection and Some Related Numerical Calculations

- Physics
- 1982

Abstract A scale analysis valid for deep moist convection is carried out. The approximate equations of motion are anelastic with the time scale set by the Brunt- Vaisala frequency. A new assumption… Expand

Symmetric Stability of Zonal Flow under Full-Component Coriolis Force —Effect of the Horizontal Component of the Planetary Vorticity—

- Physics
- 2009

The effect of the horizontal component fH of the planetary vorticity on the symmetric stability of zonal flow is investigated using the linearized Boussinesq equations on the f -plane. It is shown… Expand

Nonlinear axially symmetric circulations in a nearly inviscid atmosphere

- Physics
- 1980

Abstract The structure of certain axially symmetric circulations in a stably stratified, differentially heated, rotating Boussinesq fluid on a sphere is analyzed. A simple approximate theory [similar… Expand

A Three-Dimensional Anelastic Model Based on the Vorticity Equation

- Physics
- 2008

Abstract A three-dimensional anelastic model has been developed using the vorticity equation, in which the pressure gradient force is eliminated. The prognostic variables of the model dynamics are… Expand

Geophysical and astrophysical fluid dynamics beyond the traditional approximation

- Physics
- 2008

[1] In studies on geophysical fluid dynamics, it is common practice to take the Coriolis force only partially into account by neglecting the components proportional to the cosine of latitude, the… Expand