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DOI | 10.1175/JAS-D-18-0288.1 |
The Long- and Short-Lived North Atlantic Oscillation Events in a Simplified Atmospheric Model | |
Song, Jie | |
2019-09-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:9页码:2673-2700 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | This study investigates the North Atlantic Oscillation (NAO) events with relatively long and short lifetimes based on an 8000-day perpetual-boreal-winter [December-February (DJF)] run result of the idealized Geophysical Fluid Dynamics Laboratory (GFDL) dynamical core atmospheric model. We identify the so-called long- and short-lived positive and negative NAO events from the 8000-day model output. The composite 300-hPa geopotential height anomalies show that the spatial patterns of the composite long-lived NAO events closely resemble the Northern Hemisphere annular mode (NAM) because the NAO dipole is accompanied with a statistically significant North Pacific meridional dipole (NPMD) at similar latitudes as that of the NAO dipole. The composite short-lived NAO events exhibit the locally confined canonical NAO. Twelve sets of modified initial-value experiments indicate that an absence (a presence) of the NPMD-type perturbations at the early stage of the long (short)-lived NAO events will decrease (increase) their intensities and naturally shorten (lengthen) their lifetimes. Thus, the preceding NPMD is an early factor that is conducive to the emergence of the long-lived NAO events in the model. We argue that through directly modulating the synoptic eddy forcing over the North Atlantic region, the preceding NPMD can gradually arouse the NAO-like circulation anomalies on the following days. That is the reason why the preceding NPMD can modulate the intensities and lifetimes of the NAO events. |
英文关键词 | Annular mode Arctic Oscillation Atmospheric circulation Dynamics |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481852900001 |
WOS关键词 | ARCTIC OSCILLATION ; STRATOSPHERIC INFLUENCE ; TELECONNECTION PATTERN ; GEOPOTENTIAL HEIGHT ; HEMISPHERE WINTER ; SST ANOMALIES ; STORM TRACKS ; PART I ; CIRCULATION ; NAO |
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/186793 |
专题 | 地球科学 |
作者单位 | Chinese Acad Sci, Inst Atmospher Phys, LASG, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Song, Jie. The Long- and Short-Lived North Atlantic Oscillation Events in a Simplified Atmospheric Model[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(9):2673-2700. |
APA | Song, Jie.(2019).The Long- and Short-Lived North Atlantic Oscillation Events in a Simplified Atmospheric Model.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(9),2673-2700. |
MLA | Song, Jie."The Long- and Short-Lived North Atlantic Oscillation Events in a Simplified Atmospheric Model".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.9(2019):2673-2700. |
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