Aura/MLS observes and SD-WACCM-X simulates the seasonality, quasi-biennial oscillation and El Niño–Southern Oscillation of the migrating diurnal tide driving upper mesospheric CO primarily through vertical advection

Salinas, Cornelius Csar Jude H.; Wu, Dong L.; Lee, Jae N.; Chang, Loren C.; Qian, Liying; Liu, Hanli

doi:https://doi.org/10.5194/acp-23-1705-2023

Articles | Volume 23, issue 2

https://doi.org/10.5194/acp-23-1705-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-1705-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 2

Research article

|

31 Jan 2023

Research article |

| 31 Jan 2023

Aura/MLS observes and SD-WACCM-X simulates the seasonality, quasi-biennial oscillation and El Niño–Southern Oscillation of the migrating diurnal tide driving upper mesospheric CO primarily through vertical advection

Cornelius Csar Jude H. Salinas, Dong L. Wu, Jae N. Lee, Loren C. Chang, Liying Qian, and Hanli Liu

Data sets

SABER dataset SABER GATS https://saber.gats-inc.com/data.php

MLS dataset NASA Jet Propulsion Laboratory https://mls.jpl.nasa.gov/

QBO index National Weather Service Climate Prediction Center http://www.cpc.ncep.noaa.gov/data/indices/qbo.u30.index

ENSO/MEI index Physical Science Laboratory https://psl.noaa.gov/enso/mei/

Short summary

Upper mesospheric carbon monoxide's (CO) photochemical lifetime is longer than dynamical timescales. This work uses satellite observations and model simulations to establish that the migrating diurnal tide and its seasonal and interannual variabilities drive CO primarily through vertical advection. Vertical advection is a transport process that is currently difficult to observe. This work thus shows that we can use CO as a tracer for vertical advection across seasonal and interannual timescales.