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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Cited articles

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Barnes, E. A., Parazoo, N., Orbe, C., and Denning, A. S.: Isentropic transport and the seasonal cycle amplitude of CO2, J. Geophys. Res.-Atmos., 121, 8106–8124, https://doi.org/10.1002/2016JD025109, 2016. 
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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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