Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD032106 |
The Impact of the Stratosphere on the MJO in a Forecast Model | |
Martin, Zane1; Vitart, Frederic2; Wang, Shuguang1; Sobel, Adam1,3 | |
2020-02-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2020 |
卷号 | 125期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | This study examines the relationship between the Madden-Julian oscillation (MJO) and stratospheric quasi-biennial oscillation (QBO) in a state-of-the-art global numerical weather forecast model. A set of 61-day model integrations, with 15 ensemble members, is performed across 84 start dates during December-February of 1989-2016. For 28 of those dates-every 1 January-the stratosphere is initialized from observation, and the model simulates stronger MJO events during observed easterly QBO phases (QBOE) than westerly QBO phases (QBOW). However, in these "control experiments," the QBO's impact on the MJO is already present in the initial conditions, and the direct influence of the model stratosphere during the simulation is unclear. To explore this more directly, the model was rerun with an artificially imposed QBOE and QBOW state, replacing the existing stratospheric initial condition above 150 hPa while leaving the troposphere unaltered. Though the imposed QBO states weaken faster in the model than in observations, their persistence is comparable to the control simulations. The MJO is stronger during imposed-QBOE experiments than imposed-QBOW, and differences are statistically significant by several metrics, though magnitude of the differences is smaller than in observations. Analysis suggests that the strength of the MJO response to the QBO increases for simulations with stronger upper-tropospheric temperature differences and for simulations in which the MJO at the initialization time is strong and active over the Maritime Continent. However, tropospheric conditions still appear to have a dominant effect in explaining the apparent QBO influence in this model. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000519227000037 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; QBO ; PREDICTION ; MODULATION |
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/280077 |
专题 | 气候变化 |
作者单位 | 1.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA; 2.European Ctr Medium ange Weather Forecasting, Reading, Berks, England; 3.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA |
推荐引用方式 GB/T 7714 | Martin, Zane,Vitart, Frederic,Wang, Shuguang,et al. The Impact of the Stratosphere on the MJO in a Forecast Model[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(4). |
APA | Martin, Zane,Vitart, Frederic,Wang, Shuguang,&Sobel, Adam.(2020).The Impact of the Stratosphere on the MJO in a Forecast Model.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(4). |
MLA | Martin, Zane,et al."The Impact of the Stratosphere on the MJO in a Forecast Model".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.4(2020). |
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