Azimuthal averaging–reconstruction filtering techniques for finite-difference general circulation models in spherical geometry

Dang, Tong; Zhang, Binzheng; Lei, Jiuhou; Wang, Wenbin; Burns, Alan; Liu, Han-li; Pham, Kevin; Sorathia, Kareem A.

doi:https://doi.org/10.5194/gmd-14-859-2021

Articles | Volume 14, issue 2

https://doi.org/10.5194/gmd-14-859-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-14-859-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 14, issue 2

Development and technical paper

|

10 Feb 2021

Development and technical paper |

| 10 Feb 2021

Azimuthal averaging–reconstruction filtering techniques for finite-difference general circulation models in spherical geometry

Tong Dang, Binzheng Zhang, Jiuhou Lei, Wenbin Wang, Alan Burns, Han-li Liu, Kevin Pham, and Kareem A. Sorathia

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Final revised paper (published on 10 Feb 2021)
Preprint (discussion started on 23 Sep 2020)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review of gmd-2020-243', Anonymous Referee #1, 20 Oct 2020
- AC1: 'Response to reviewer's comments', Jiuhou Lei, 18 Dec 2020
RC2: 'Referee report on Development of high-resolution Thermosphere–Ionosphere Electrodynamics General Circulation Model (TIE-GCM) using Ring Average technique', Anonymous Referee #2, 26 Oct 2020
- AC2: 'Response to reviewer's comments', Jiuhou Lei, 18 Dec 2020
SC1: 'executive editor comment on gmd-2020-243', Astrid Kerkweg, 27 Oct 2020
- AC3: 'Response to Executive editor comment: code and data availability', Jiuhou Lei, 18 Dec 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Jiuhou Lei on behalf of the Authors (18 Dec 2020) Author's response Manuscript

ED: Publish subject to technical corrections (21 Dec 2020) by Josef Koller

AR by Jiuhou Lei on behalf of the Authors (24 Dec 2020) Author's response Manuscript

Short summary

This paper describes a numerical treatment (ring average) to relax the time step in finite-difference schemes when using spherical and cylindrical coordinates with axis singularities. The ring average is used to develop a high-resolution thermosphere–ionosphere coupled community model. The technique is a significant improvement in space weather modeling capability, and it can also be adapted to more general finite-difference solvers for hyperbolic equations in spherical and polar geometries.