Articles | Volume 21, issue 1
Atmos. Chem. Phys., 21, 217–238, 2021
https://doi.org/10.5194/acp-21-217-2021
Atmos. Chem. Phys., 21, 217–238, 2021
https://doi.org/10.5194/acp-21-217-2021

Research article 12 Jan 2021

Research article | 12 Jan 2021

A mass-weighted isentropic coordinate for mapping chemical tracers and computing atmospheric inventories

Yuming Jin et al.

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AR by Yuming Jin on behalf of the Authors (05 Nov 2020)  Author's response    Manuscript
ED: Publish as is (24 Nov 2020) by Andreas Engel
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Short summary
We propose a new atmospheric coordinate (Mθe) based on equivalent potential temperature (θe) but with mass as the unit. This coordinate is useful in studying the spatial and temporal distribution of long-lived chemical tracers (CO2, CH4, O2 / N2, etc.) from sparse data, like airborne observation. Using this coordinate and sparse airborne observation (HIPPO and ATom), we resolve the Northern Hemisphere mass-weighted average CO2 seasonal cycle with high accuracy.
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