Role of Gravity Waves in a Vortex-Split Sudden Stratospheric Warming in January 2009
DC Field | Value | Language |
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dc.contributor.author | Song, Byeong-Gwon | - |
dc.contributor.author | Chun, Hye-Yeong | - |
dc.contributor.author | Song, In-Sun | - |
dc.date.accessioned | 2021-11-29T06:25:56Z | - |
dc.date.available | 2021-11-29T06:25:56Z | - |
dc.date.issued | 2020-10 | - |
dc.identifier.uri | https://repository.kopri.re.kr/handle/201206/13038 | - |
dc.description.abstract | The role of gravity waves (GWs) in a sudden stratospheric warming (SSW) event that occurred in January 2009 (SSW09) is investigated using the MERRA-2 reanalysis dataset. Nearly 2 weeks prior to the central date (Lag = 0), at which the zonal-mean zonal wind at 10 hPa and 60ºN first becomes negative, westward GW drag (GWD) is significantly enhanced in the lower mesosphere and stratosphere. At 5 days before Lag = 0, planetary waves (PWs) of zonal wavenumber (ZWN)-2 in the stratosphere are enhanced, while PWs of ZWN-1 are weakened, which are evident from the amplitudes of the PWs and their Eliassen-Palm flux divergence (EPD). To examine the relationship between PWs and GWs, a nonconservative GWD (NCGWD) source term of the linearized quasi-geostrophic potential vorticity equation is considered. A ZWN-2 pattern of the NCGWD forcing is developed around z = 55-60 km with a secondary peak around z = 40 km just before the PWs of ZWN-2 in the stratosphere began to enhance. A significant positive correlation between the NCGWD forcing in the upper stratosphere and lower mesosphere (USLM; 0.3-0.1 hPa in the present data) and the PWs of ZWN-2 in the stratosphere (5-1 hPa) exists. This result demonstrates that the amplification of the PWs of ZWN-2 in the stratosphere before the onset of SSW09 is likely related to the generation of PWs by GWD in the USLM, which is revealed by the enhanced downward-propagating PWs of ZWN-2 into the stratosphere from above. | en_US |
dc.language | English | en_US |
dc.language.iso | en | en_US |
dc.subject | Meteorology & Atmospheric Sciences | en_US |
dc.subject.classification | 해당사항없음 | en_US |
dc.title | Role of Gravity Waves in a Vortex-Split Sudden Stratospheric Warming in January 2009 | en_US |
dc.title.alternative | 2009년 1월 와동 분리형 성층권 돌연승온에 미치는 중력파의 역할 | en_US |
dc.type | Article | en_US |
dc.identifier.bibliographicCitation | Song, Byeong-Gwon, Chun, Hye-Yeong, Song, In-Sun. 2020. "Role of Gravity Waves in a Vortex-Split Sudden Stratospheric Warming in January 2009". <em>JOURNAL OF THE ATMOSPHERIC SCIENCES</em>, 77(10): 3321-3342. | - |
dc.citation.title | JOURNAL OF THE ATMOSPHERIC SCIENCES | en_US |
dc.citation.volume | 77 | en_US |
dc.citation.number | 10 | en_US |
dc.identifier.doi | 10.1175/JAS-D-20-0039.1 | - |
dc.citation.startPage | 3321 | en_US |
dc.citation.endPage | 3342 | en_US |
dc.description.articleClassification | SCI | - |
dc.description.jcrRate | JCR 2018:27.907 | en_US |
dc.subject.keyword | Gravity waves | en_US |
dc.subject.keyword | Planetary waves | en_US |
dc.subject.keyword | Potential vorticity | en_US |
dc.subject.keyword | Stratospheric circulation | en_US |
dc.subject.keyword | Waves | en_US |
dc.subject.keyword | atmospheric | en_US |
dc.subject.keyword | Middle atmosphere | en_US |
dc.identifier.localId | 2020-0110 | - |
dc.identifier.scopusid | 2-s2.0-85092285668 | - |
dc.identifier.wosid | 000589821600003 | - |
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