Unexpected Global Structure of Quasi‐4‐Day Wave With Westward Zonal Wavenumber 2 During the February 2023 Unusual Major Sudden Stratospheric Warming With Elevated Stratopause
Abstract During February 2023, the quasi‐4‐day wave (Q4DW) with westward zonal wavenumber 2 (W2) reached its largest amplitude of ∼400 m in the Southern Hemisphere (SH) geopotential height observations since 2004, which occurred simultaneously with an Arctic major sudden stratospheric warming (SSW)...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-07-01
|
| Series: | Geophysical Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2024GL109682 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850229017059262464 |
|---|---|
| author | Yusong Qin Sheng‐Yang Gu Xiankang Dou Yafei Wei |
| author_facet | Yusong Qin Sheng‐Yang Gu Xiankang Dou Yafei Wei |
| author_sort | Yusong Qin |
| collection | DOAJ |
| description | Abstract During February 2023, the quasi‐4‐day wave (Q4DW) with westward zonal wavenumber 2 (W2) reached its largest amplitude of ∼400 m in the Southern Hemisphere (SH) geopotential height observations since 2004, which occurred simultaneously with an Arctic major sudden stratospheric warming (SSW) with an elevated stratopause (ES). However, the Q4DW‐W2 perturbations in the Northern Hemisphere (NH) were unexpectedly suppressed despite the unstable Arctic stratosphere and mesosphere during the 2023 ES‐SSW. Diagnostic analysis shows that the westward winds at ∼54°N–70°N in the upper stratosphere of ∼‐79 m/s during the 2023 ES‐SSW were the strongest during boreal winters over the past two decades, which benefited from the onset of a preceding minor SSW at the end of January. The strongest westward wind generated a wave geometry configuration of full reflection for Q4DW‐W2 in the NH, while the Q4DW‐W2 enhancement in the SH was induced by the in‐situ amplification of the surviving seeding perturbations. |
| format | Article |
| id | doaj-art-2c77f7df6caf4b05bef58b45548e280c |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-2c77f7df6caf4b05bef58b45548e280c2025-08-20T02:04:21ZengWileyGeophysical Research Letters0094-82761944-80072024-07-015113n/an/a10.1029/2024GL109682Unexpected Global Structure of Quasi‐4‐Day Wave With Westward Zonal Wavenumber 2 During the February 2023 Unusual Major Sudden Stratospheric Warming With Elevated StratopauseYusong Qin0Sheng‐Yang Gu1Xiankang Dou2Yafei Wei3Electronic Information School Wuhan University Wuhan ChinaElectronic Information School Wuhan University Wuhan ChinaElectronic Information School Wuhan University Wuhan ChinaElectronic Information School Wuhan University Wuhan ChinaAbstract During February 2023, the quasi‐4‐day wave (Q4DW) with westward zonal wavenumber 2 (W2) reached its largest amplitude of ∼400 m in the Southern Hemisphere (SH) geopotential height observations since 2004, which occurred simultaneously with an Arctic major sudden stratospheric warming (SSW) with an elevated stratopause (ES). However, the Q4DW‐W2 perturbations in the Northern Hemisphere (NH) were unexpectedly suppressed despite the unstable Arctic stratosphere and mesosphere during the 2023 ES‐SSW. Diagnostic analysis shows that the westward winds at ∼54°N–70°N in the upper stratosphere of ∼‐79 m/s during the 2023 ES‐SSW were the strongest during boreal winters over the past two decades, which benefited from the onset of a preceding minor SSW at the end of January. The strongest westward wind generated a wave geometry configuration of full reflection for Q4DW‐W2 in the NH, while the Q4DW‐W2 enhancement in the SH was induced by the in‐situ amplification of the surviving seeding perturbations.https://doi.org/10.1029/2024GL109682quasi‐4‐day wavesudden stratospheric warmingelevated stratopausefull reflectionspatial structurewind reversal |
| spellingShingle | Yusong Qin Sheng‐Yang Gu Xiankang Dou Yafei Wei Unexpected Global Structure of Quasi‐4‐Day Wave With Westward Zonal Wavenumber 2 During the February 2023 Unusual Major Sudden Stratospheric Warming With Elevated Stratopause Geophysical Research Letters quasi‐4‐day wave sudden stratospheric warming elevated stratopause full reflection spatial structure wind reversal |
| title | Unexpected Global Structure of Quasi‐4‐Day Wave With Westward Zonal Wavenumber 2 During the February 2023 Unusual Major Sudden Stratospheric Warming With Elevated Stratopause |
| title_full | Unexpected Global Structure of Quasi‐4‐Day Wave With Westward Zonal Wavenumber 2 During the February 2023 Unusual Major Sudden Stratospheric Warming With Elevated Stratopause |
| title_fullStr | Unexpected Global Structure of Quasi‐4‐Day Wave With Westward Zonal Wavenumber 2 During the February 2023 Unusual Major Sudden Stratospheric Warming With Elevated Stratopause |
| title_full_unstemmed | Unexpected Global Structure of Quasi‐4‐Day Wave With Westward Zonal Wavenumber 2 During the February 2023 Unusual Major Sudden Stratospheric Warming With Elevated Stratopause |
| title_short | Unexpected Global Structure of Quasi‐4‐Day Wave With Westward Zonal Wavenumber 2 During the February 2023 Unusual Major Sudden Stratospheric Warming With Elevated Stratopause |
| title_sort | unexpected global structure of quasi 4 day wave with westward zonal wavenumber 2 during the february 2023 unusual major sudden stratospheric warming with elevated stratopause |
| topic | quasi‐4‐day wave sudden stratospheric warming elevated stratopause full reflection spatial structure wind reversal |
| url | https://doi.org/10.1029/2024GL109682 |
| work_keys_str_mv | AT yusongqin unexpectedglobalstructureofquasi4daywavewithwestwardzonalwavenumber2duringthefebruary2023unusualmajorsuddenstratosphericwarmingwithelevatedstratopause AT shengyanggu unexpectedglobalstructureofquasi4daywavewithwestwardzonalwavenumber2duringthefebruary2023unusualmajorsuddenstratosphericwarmingwithelevatedstratopause AT xiankangdou unexpectedglobalstructureofquasi4daywavewithwestwardzonalwavenumber2duringthefebruary2023unusualmajorsuddenstratosphericwarmingwithelevatedstratopause AT yafeiwei unexpectedglobalstructureofquasi4daywavewithwestwardzonalwavenumber2duringthefebruary2023unusualmajorsuddenstratosphericwarmingwithelevatedstratopause |