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Modulation of the boreal wintertime Madden-Julian oscillation by the stratospheric quasi-biennial oscillation
- Title
- Modulation of the boreal wintertime Madden-Julian oscillation by the stratospheric quasi-biennial oscillation
- Authors
- Yoo, Changhyun; Son, Seok-Woo
- Ewha Authors
- 유창현
- SCOPUS Author ID
- 유창현
- Issue Date
- 2016
- Journal Title
- GEOPHYSICAL RESEARCH LETTERS
- ISSN
- 0094-8276
1944-8007
- Citation
- GEOPHYSICAL RESEARCH LETTERS vol. 43, no. 3, pp. 1392 - 1398
- Keywords
- MJO; QBO; intraseasonal variability; interannual variability
- Publisher
- AMER GEOPHYSICAL UNION
- Indexed
- SCI; SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Madden-Julian oscillation (MJO), the dominant mode of intraseasonal variability in the tropical troposphere, has a significant impact on global weather and climate. Here we present that the year-to-year variation of the MJO activity shows significant changes with the quasi-biennial oscillation (QBO) in the tropical stratosphere. Specifically, the boreal winter MJO amplitude, evaluated by various metrics, is typically stronger than normal during the QBO easterly phase at 50hPa and weaker than normal during the QBO westerly phase at 50hPa. This relationship, which is possibly mediated by the QBO-related static stability and/or vertical wind shear changes in the tropical upper troposphere and lower stratosphere, is robust whether or not the activeness of the MJO or QBO is taken into account. This result suggests a new potential route from the stratosphere that regulates the organized tropical convection, helping to improve the prediction skill of the boreal winter MJO.
- DOI
- 10.1002/2016GL067762
- Appears in Collections:
- 일반대학원 > 대기과학공학과 > Journal papers
- Files in This Item:
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Modulation of the boreal wintertime Madden-Julian oscillation by the stratospheric quasi-biennial oscillation.pdf(1.04 MB)
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