Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0205.1 |
Influence of the Stratospheric Quasi-Biennial Oscillation on the Madden-Julian Oscillation during Austral Summer | |
Nishimoto, Eriko; Yoden, Shigeo | |
2017-04-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | Influence of the stratospheric quasi-biennial oscillation (QBO) on the Madden-Julian oscillation (MJO) and its statistical significance are examined for austral summer (DJF) in neutral ENSO events during 1979-2013. The amplitude of the OLR-based MJO index (OMI) is typically larger in the easterly phase of the QBO at 50 hPa (E-QBO phase) than in the westerly (W-QBO) phase. Daily composite analyses are performed by focusing on phase 4 of the OMI, when the active convective system is located over the eastern Indian Ocean through the Maritime Continent. The composite OLR anomaly shows a larger negative value and slower eastward propagation with a prolonged period of active convection in the E-QBO phase than in the W-QBO phase. Statistically significant differences of the MJO activities between the QBO phases also exist with dynamical consistency in the divergence of horizontal wind, the vertical wind, the moisture, the precipitation, and the 100-hPa temperature. A conditional sampling analysis is also performed by focusing on the most active convective region for each day, irrespective of the MJO amplitude and phase. Composite vertical profiles of the conditionally sampled data over the most active convective region reveal lower temperature and static stability around the tropopause in the E-QBO phase than in the W-QBO phase, which indicates more favorable conditions for developing deep convection. This feature is more prominent and extends into lower levels in the upper troposphere over the most active convective region than other tropical regions. Composite longitude-height sections show similar features of the large-scale convective system associated with the MJO, including a vertically propagating Kelvin response. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399333700009 |
WOS关键词 | SUDDEN WARMING EVENT ; TROPICAL TROPOPAUSE ; VARIABILITY ; TROPOSPHERE ; CONVECTION ; SYSTEM |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29756 |
专题 | 地球科学 |
作者单位 | Kyoto Univ, Dept Geophys, Kyoto, Japan |
推荐引用方式 GB/T 7714 | Nishimoto, Eriko,Yoden, Shigeo. Influence of the Stratospheric Quasi-Biennial Oscillation on the Madden-Julian Oscillation during Austral Summer[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(4). |
APA | Nishimoto, Eriko,&Yoden, Shigeo.(2017).Influence of the Stratospheric Quasi-Biennial Oscillation on the Madden-Julian Oscillation during Austral Summer.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(4). |
MLA | Nishimoto, Eriko,et al."Influence of the Stratospheric Quasi-Biennial Oscillation on the Madden-Julian Oscillation during Austral Summer".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.4(2017). |
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