Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0211.1 |
The Consistency of MJO Teleconnection Patterns: An Explanation Using Linear Rossby Wave Theory | |
Tseng, Kai-Chih; Maloney, Eric; Barnes, Elizabeth | |
2019 | |
发表期刊 | JOURNAL OF CLIMATE
![]() |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:2页码:531-548 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The Madden-Julian oscillation (MJO) excites strong variations in extratropical atmospheric circulations that have important implications for subseasonal-to-seasonal (S2S) prediction. A previous study showed that particular MJO phases are characterized by a consistent modulation of geopotential heights in the North Pacific and adjacent regions across different MJO events, and demonstrated that this consistency is beneficial for extended numerical weather forecasts (i.e., lead times of two weeks to one month). In this study, we examine the physical mechanisms that lead some MJO phases to have more consistent teleconnections than others using a linear baroclinic model. The results show that MJO phases 2, 3, 6, and 7 consistently generate Pacific-North American (PNA)-like patterns on S2S time scales while other phases do not. A Rossby wave source analysis is applied and shows that a dipole-like pattern of Rossby wave source on each side of the subtropical jet can increase the pattern consistency of teleconnections due to the constructive interference of similar teleconnection signals. On the other hand, symmetric patterns of Rossby wave source can dramatically reduce the pattern consistency due to destructive interference. A dipole-like Rossby wave source pattern is present most frequently when tropical heating is found in the Indian Ocean or the Pacific warm pool, and a symmetric Rossby wave source is present most frequently when tropical heating is located over the Maritime Continent. Thus, the MJO phase-dependent pattern consistency of teleconnections is a special case of this mechanism. |
英文关键词 | Pacific-North American pattern oscillation Planetary waves Intraseasonal variability Tropical variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000454493900002 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; INTRASEASONAL OSCILLATION ; ATMOSPHERE ; PACIFIC ; FLOW ; MECHANISMS ; PREDICTION ; IMPACT ; HEAT ; EDDY |
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/21068 |
专题 | 气候变化 |
作者单位 | Colorado State Univ, Ft Collins, CO 80523 USA |
推荐引用方式 GB/T 7714 | Tseng, Kai-Chih,Maloney, Eric,Barnes, Elizabeth. The Consistency of MJO Teleconnection Patterns: An Explanation Using Linear Rossby Wave Theory[J]. JOURNAL OF CLIMATE,2019,32(2):531-548. |
APA | Tseng, Kai-Chih,Maloney, Eric,&Barnes, Elizabeth.(2019).The Consistency of MJO Teleconnection Patterns: An Explanation Using Linear Rossby Wave Theory.JOURNAL OF CLIMATE,32(2),531-548. |
MLA | Tseng, Kai-Chih,et al."The Consistency of MJO Teleconnection Patterns: An Explanation Using Linear Rossby Wave Theory".JOURNAL OF CLIMATE 32.2(2019):531-548. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论