Preprints
https://doi.org/10.5194/acp-2022-653
https://doi.org/10.5194/acp-2022-653
 
11 Oct 2022
11 Oct 2022
Status: this preprint is currently under review for the journal ACP.

Determination of the chemical equator from GEOS-Chem model simulation: a focus on the Tropical Western Pacific region

Xiaoyu Sun1, Mathias Palm1, Justus Notholt1, and Katrin Müller2 Xiaoyu Sun et al.
  • 1Institute of Environmental Physics, University of Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
  • 2Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Telegrafenberg A43, 14473 Potsdam, Germany

Abstract. The Tropical Western Pacific (TWP) is an active interhemispheric transport region that contributes significantly to global stratosphere-troposphere exchange. We developed a method called Chemical Equator based on model simulations of a virtual passive tracer to analyze atmospheric transport in the tropics, with a focus on the TWP region. We compare the chemical equator to common indicators of transportation such as tropical rain belts and wind fields. We obtained a vertical pattern of interhemispheric transport processes from the model's three-dimensional output.

Xiaoyu Sun et al.

Status: open (until 30 Dec 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2022-653', Anonymous Referee #1, 14 Nov 2022 reply
  • RC2: 'Comment on acp-2022-653', Anonymous Referee #1, 14 Nov 2022 reply

Xiaoyu Sun et al.

Data sets

Determination of the chemical equator from GEOS-Chem model simulation: a focus on the Tropical Western Pacific region Xiaoyu Sun; Mathias Palm; Justus Notholt; Katrin Mülle https://doi.org/10.5281/zenodo.7018391

Model code and software

Chemical-Equator Xiaoyu Sun https://github.com/XiaoyuSun-n/Chemical-Equator

Xiaoyu Sun et al.

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Short summary
The Tropical Western Pacific (TWP) is an active interhemispheric transport region contributing significantly to the global climate. A method to determine the Chemical Equator was developed by model simulations of a virtual passive tracer to analyze transport in the tropics, with a focus on the TWP region. We compare the chemical equator with tropical rain belts and wind fields and obtained a vertical pattern of interhemispheric transport processes which shows tilt structure in certain seasons.
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