Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
Preprints
Preprints
https://doi.org/10.5194/acp-2022-653
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2022-653
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Preprints
 
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.
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  • 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
Received: 19 Sep 2022 – Discussion started: 11 Oct 2022

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.

How to cite. Sun, X., Palm, M., Notholt, J., and Müller, K.: Determination of the chemical equator from GEOS-Chem model simulation: a focus on the Tropical Western Pacific region, Atmos. Chem. Phys. Discuss. [preprint], https://doi.org/10.5194/acp-2022-653, in review, 2022.

Xiaoyu Sun et al.

Status: open (extended)

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  • 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.

Supplement

https://doi.org/10.5194/acp-2022-653-supplement

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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