Articles | Volume 21, issue 12
https://doi.org/10.5194/acp-21-9839-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-21-9839-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
01 Jul 2021
Research article |
| 01 Jul 2021
| 01 Jul 2021
Contributions of equatorial waves and small-scale convective gravity waves to the 2019/20 quasi-biennial oscillation (QBO) disruption
Min-Jee Kang
Department of Atmospheric Sciences, Yonsei University, Seoul, South Korea
Hye-Yeong Chun
CORRESPONDING AUTHOR
Department of Atmospheric Sciences, Yonsei University, Seoul, South Korea
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Cited
22 citations as recorded by crossref.
- Changes of tropical gravity waves and the quasi‐biennial oscillation in storm‐resolving simulations of idealized global warming H. Franke et al. 10.1002/qj.4534
- Distinct Upward Propagation of the Westerly QBO in Winter 2015/16 and Its Relationship With Brewer‐Dobson Circulation M. Kang et al. 10.1029/2022GL100101
- A revisit and comparison of the quasi-biennial oscillation (QBO) disruption events in 2015/16 and 2019/20 Y. Wang et al. 10.1016/j.atmosres.2023.106970
- The Gravity Wave Activity during Two Recent QBO Disruptions Revealed by U.S. High-Resolution Radiosonde Data H. Li et al. 10.3390/rs15020472
- Observations of a Strong Intraseasonal Oscillation in the MLT Region During the 2015/2016 Winter Over Mohe, China Y. Gong et al. 10.1029/2021JA030076
- Changes in stratospheric aerosol extinction coefficient after the 2018 Ambae eruption as seen by OMPS-LP and MAECHAM5-HAM E. Malinina et al. 10.5194/acp-21-14871-2021
- Impacts, processes and projections of the quasi-biennial oscillation J. Anstey et al. 10.1038/s43017-022-00323-7
- Characteristics of Latent Heating Rate From GPM and Convective Gravity Wave Momentum Flux Calculated Using the GPM Data H. Lee et al. 10.1029/2022JD037003
- Role of Quasi-Biennial Oscillation in modulating subseasonal to seasonal variability of Indian Summer Monsoon S. Waje et al. 10.1007/s00382-025-07738-0
- Aeolus wind lidar observations of the 2019/2020 quasi-biennial oscillation disruption with comparison to radiosondes and reanalysis T. Banyard et al. 10.5194/acp-24-2465-2024
- Dynamic configuration before quasi-biennial oscillation disruptions revealed from the perspective of planetary waves Y. He et al. 10.1038/s41612-024-00874-0
- Possible coherency of synchronous warming of tropical oceans and the QBO amplitude variation X. Zhu & J. Rao 10.1016/j.atmosres.2025.108241
- Role of tropical lower stratosphere winds in quasi-biennial oscillation disruptions M. Kang et al. 10.1126/sciadv.abm7229
- Springtime Southern Hemisphere Quasi‐Stationary Planetary Wave Activities Associated With ENSO/IOD D. Kim et al. 10.1029/2023JD039678
- Zonal Asymmetry of the Stratopause in the 2019/2020 Arctic Winter Y. Shi et al. 10.3390/rs14061496
- QBO Disruption–like Events in the China Meteorological Administration Climate Model Y. Wang et al. 10.1007/s00376-025-4338-4
- The impact of quasi-biennial oscillation (QBO) disruptions on diurnal tides over the low- and mid-latitude mesosphere and lower thermosphere (MLT) region observed by a meteor radar chain J. Wang et al. 10.5194/acp-24-13299-2024
- Stratospheric water vapour and ozone response to the quasi-biennial oscillation disruptions in 2016 and 2020 M. Diallo et al. 10.5194/acp-22-14303-2022
- Long‐Term Characteristics of the Meteor Radar Winds Observed at King Sejong Station, Antarctica B. Song et al. 10.1029/2022JD037190
- The Influence of the Stratospheric Quasi‐Biennial Oscillation on the Tropical Easterly Jet Over the Maritime Continent Y. Li et al. 10.1029/2022GL098940
- The stratosphere: a review of the dynamics and variability N. Butchart 10.5194/wcd-3-1237-2022
- Climatology of meteor echoes and mean winds in the MLT region revealed by SVU meteor radar over Tirupati (13.63oN, 79.4oE): Long-term trends M. Venkat Ratnam et al. 10.1016/j.asr.2024.12.055
22 citations as recorded by crossref.
- Changes of tropical gravity waves and the quasi‐biennial oscillation in storm‐resolving simulations of idealized global warming H. Franke et al. 10.1002/qj.4534
- Distinct Upward Propagation of the Westerly QBO in Winter 2015/16 and Its Relationship With Brewer‐Dobson Circulation M. Kang et al. 10.1029/2022GL100101
- A revisit and comparison of the quasi-biennial oscillation (QBO) disruption events in 2015/16 and 2019/20 Y. Wang et al. 10.1016/j.atmosres.2023.106970
- The Gravity Wave Activity during Two Recent QBO Disruptions Revealed by U.S. High-Resolution Radiosonde Data H. Li et al. 10.3390/rs15020472
- Observations of a Strong Intraseasonal Oscillation in the MLT Region During the 2015/2016 Winter Over Mohe, China Y. Gong et al. 10.1029/2021JA030076
- Changes in stratospheric aerosol extinction coefficient after the 2018 Ambae eruption as seen by OMPS-LP and MAECHAM5-HAM E. Malinina et al. 10.5194/acp-21-14871-2021
- Impacts, processes and projections of the quasi-biennial oscillation J. Anstey et al. 10.1038/s43017-022-00323-7
- Characteristics of Latent Heating Rate From GPM and Convective Gravity Wave Momentum Flux Calculated Using the GPM Data H. Lee et al. 10.1029/2022JD037003
- Role of Quasi-Biennial Oscillation in modulating subseasonal to seasonal variability of Indian Summer Monsoon S. Waje et al. 10.1007/s00382-025-07738-0
- Aeolus wind lidar observations of the 2019/2020 quasi-biennial oscillation disruption with comparison to radiosondes and reanalysis T. Banyard et al. 10.5194/acp-24-2465-2024
- Dynamic configuration before quasi-biennial oscillation disruptions revealed from the perspective of planetary waves Y. He et al. 10.1038/s41612-024-00874-0
- Possible coherency of synchronous warming of tropical oceans and the QBO amplitude variation X. Zhu & J. Rao 10.1016/j.atmosres.2025.108241
- Role of tropical lower stratosphere winds in quasi-biennial oscillation disruptions M. Kang et al. 10.1126/sciadv.abm7229
- Springtime Southern Hemisphere Quasi‐Stationary Planetary Wave Activities Associated With ENSO/IOD D. Kim et al. 10.1029/2023JD039678
- Zonal Asymmetry of the Stratopause in the 2019/2020 Arctic Winter Y. Shi et al. 10.3390/rs14061496
- QBO Disruption–like Events in the China Meteorological Administration Climate Model Y. Wang et al. 10.1007/s00376-025-4338-4
- The impact of quasi-biennial oscillation (QBO) disruptions on diurnal tides over the low- and mid-latitude mesosphere and lower thermosphere (MLT) region observed by a meteor radar chain J. Wang et al. 10.5194/acp-24-13299-2024
- Stratospheric water vapour and ozone response to the quasi-biennial oscillation disruptions in 2016 and 2020 M. Diallo et al. 10.5194/acp-22-14303-2022
- Long‐Term Characteristics of the Meteor Radar Winds Observed at King Sejong Station, Antarctica B. Song et al. 10.1029/2022JD037190
- The Influence of the Stratospheric Quasi‐Biennial Oscillation on the Tropical Easterly Jet Over the Maritime Continent Y. Li et al. 10.1029/2022GL098940
- The stratosphere: a review of the dynamics and variability N. Butchart 10.5194/wcd-3-1237-2022
- Climatology of meteor echoes and mean winds in the MLT region revealed by SVU meteor radar over Tirupati (13.63oN, 79.4oE): Long-term trends M. Venkat Ratnam et al. 10.1016/j.asr.2024.12.055
Latest update: 26 Jul 2025
Short summary
In winter 2019/20, the westerly quasi-biennial oscillation (QBO) phase was disrupted again by easterly winds. It is found that strong Rossby waves from the Southern Hemisphere weaken the jet core in early stages, and strong mixed Rossby–gravity waves reverse the wind in later stages. Inertia–gravity waves and small-scale convective gravity waves also provide negative forcing. These strong waves are attributed to an anomalous wind profile, barotropic instability, and slightly strong convection.
In winter 2019/20, the westerly quasi-biennial oscillation (QBO) phase was disrupted again by...
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