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The stratospheric QBO affects antarctic sea ice through the tropical convection in early austral winter
https://nipr.repo.nii.ac.jp/records/16481
https://nipr.repo.nii.ac.jp/records/16481c0ce9584-3cbb-4548-9205-321a7c2e1567
Item type | 学術雑誌論文 / Journal Article(1) | |||||||||
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公開日 | 2021-07-29 | |||||||||
タイトル | ||||||||||
タイトル | The stratospheric QBO affects antarctic sea ice through the tropical convection in early austral winter | |||||||||
タイトル | ||||||||||
言語 | en | |||||||||
タイトル | The stratospheric QBO affects antarctic sea ice through the tropical convection in early austral winter | |||||||||
言語 | ||||||||||
言語 | eng | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | Antarctic sea ice | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | QBO | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | Rossby wave train | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | Tropical convection | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | Stratosphere | |||||||||
資源タイプ | ||||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
資源タイプ | journal article | |||||||||
アクセス権 | ||||||||||
アクセス権 | metadata only access | |||||||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||
著者 |
Yamazaki, Koji
× Yamazaki, Koji
× Nakamura, Tetsu
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抄録 | ||||||||||
内容記述タイプ | Abstract | |||||||||
内容記述 | We found a statistically significant relationship between the stratospheric quasi-biennial oscillation (QBO) and Antarctic sea ice concentration (SIC) in austral winter. SIC differences between the easterly phase of the QBO (EQBO) and westerly phase of the QBO (WQBO) show positive anomalies of SIC in the following regions: over the Ross Sea, Weddell Sea, and around 90°E. This wave-3 pattern is clearly seen in June and July, and decays in August. The increased SIC regions correspond to anomalous offshore wind regions, and the reduced SIC regions correspond to onshore wind regions, indicating the atmospheric circulation anomaly produced the SIC anomaly. The atmospheric circulation anomaly is barotropic and closely related with the upper atmospheric flow. The upper circulation anomaly shows a stationary Rossby wave train propagating from Indian Ocean. We show the enhanced convection in the tropical Indian Ocean in EQBO can excite the Rossby wave train. In summary, the stratospheric QBO affects the tropical convection, then generating the Rossby wave train which propagates into southern high latitude, and finally affecting Antarctic sea ice. There exists a possibility to predict winter sea ice in one-year advance, because the QBO is a quasi-regular oscillation. | |||||||||
書誌情報 |
en : Polar Science 巻 28, p. 100674, 発行日 2021-06 |
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ISSN | ||||||||||
収録物識別子タイプ | ISSN | |||||||||
収録物識別子 | 18739652 | |||||||||
DOI | ||||||||||
識別子タイプ | DOI | |||||||||
関連識別子 | https://doi.org/10.1016/j.polar.2021.100674 | |||||||||
関連名称 | 10.1016/j.polar.2021.100674 |