Effect of the Quasi-biennial Oscillation on Carbon Monoxide in the Stratosphere
Abstract
The interannual variability of tropical carbon monoxide (CO) from the Microwave Limb Sounder (MLS) over 2004‐2018 period is dominated by the Quasi‐biennial Oscillation (QBO). We simulate the CO variability over this period using the 2‐D Caltech/JPL chemistry‐transport model (CTM). The CTM includes the photochemical sources and sinks and transport driven by a stream function and eddy diffusivity derived from the assimilated winds of National Centers for Environmental Prediction Reanalysis 2. The results show good agreement between model and MLS observations. We also investigate the anomalous period 2015‐2016, when the QBO winds deviated significantly from their climatological values. The model simulations could capture the QBO features in agreement with observations for the anomalous period.
Additional Information
© 2019 American Geophysical Union. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. Received 4 DEC 2018; Accepted 20 JUN 2019; Accepted article online 8 JUL 2019. We thank J. N. Lee, K.-F. Li, A. Ruzmaikin and S. Wang for illuminating discussions. We thank the MLS project for the CO data and JPL for support of this work. We also acknowledge the use of the following data. NCEP2 Reanalysis data [Kistler et al., 2001] can be downloaded at https://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis2.html. The QBO winds over Singapore can be downloaded from http://www.geo.fu-berlin.de/met/ag/strat/produkte/qbo/qbo.dat.Attached Files
Published - Yung_et_al-2019-Earth_and_Space_Science.pdf
Supplemental Material - ess2340-sup-0001-2018ea000534-s01.docx
Supplemental Material - ess2340-sup-0002-2018ea000534-fs01.eps
Supplemental Material - ess2340-sup-0003-2018ea000534-fs02.eps
Supplemental Material - ess2340-sup-0004-2018ea000534-fs03.eps
Supplemental Material - ess2340-sup-0005-2018ea000534-fs04.eps
Supplemental Material - ess2340-sup-0006-2018ea000534-fs05.eps
Supplemental Material - ess2340-sup-0007-2018ea000534-fs06.eps
Supplemental Material - ess2340-sup-0008-2018ea000534-fs07.eps
Supplemental Material - ess2340-sup-0009-2018ea000534-fs08.eps
Supplemental Material - ess2340-sup-0010-2018ea000534-fs09.eps
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Additional details
- Eprint ID
- 97061
- Resolver ID
- CaltechAUTHORS:20190711-133439083
- Created
-
2019-07-11Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Astronomy Department, Division of Geological and Planetary Sciences (GPS)