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DOI | 10.1175/JCLI-D-18-0664.1 |
Recurrent Synoptic-Scale Rossby Wave Patterns and Their Effect on the Persistence of Cold and Hot Spells | |
Roethlisberger, Matthias1,2,5; Frossard, Linda1,2,3; Bosart, Lance F.4; Keyser, Daniel4; Martius, Olivia1,2,3 | |
2019-06-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:11页码:3207-3226 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; USA |
英文摘要 | The persistence of surface weather during several recent high-impact weather events has been pivotal in generating their societal impact. Here we examine Hovmoller diagrams of the 250-hPa meridional wind during several periods with particularly persistent surface weather and find a common pattern in these Hovmoller diagrams. This pattern can be characterized as a "recurrent Rossby wave pattern" (RRWP), arising from multiple transient synoptic-scale wave packets. During such RRWP periods, individual troughs and ridges forming the wave packets repeatedly amplify in the same geographical region. We discuss the synoptic evolution of two RRWP periods, in February-March 1987 and July-August 1994, and illustrate how the recurrence of the transient wave packets led to unusually long-lasting cold and hot spells, which occurred simultaneously in several regions, each separated by roughly one synoptic wavelength. Furthermore, a simple index termed R is proposed to identify RRWPs, which is based on both a time and wavenumber filter applied to conventional Hovmoller diagrams. A Weibull regression analysis then shows that large values of R are statistically significantly linked to increased durations of winter cold and summer hot spells in large areas of the Northern Hemisphere midlatitudes. Traditionally, persistent high-impact surface weather has often been linked to the occurrence of proximate atmospheric blocking. In contrast to blocking, RRWPs affect persistent surface temperature anomalies over multiple synoptic wavelengths. We therefore argue that, in addition to blocking, RRWPs should be considered as an important flow feature leading to persistent high-impact surface weather. |
英文关键词 | Blocking Planetary waves Rossby waves Stationary waves Synoptic climatology Extreme events |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467417400002 |
WOS关键词 | FEATURE-BASED TRACKING ; ARCTIC AMPLIFICATION ; ATMOSPHERIC BLOCKING ; EXTREME COLD ; PACKETS ; WEATHER ; WINTER ; PROPAGATION ; CLIMATE ; REGIMES |
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/183840 |
专题 | 气候变化 |
作者单位 | 1.Univ Bern, Inst Geog, Bern, Switzerland; 2.Univ Bern, Oeschger Ctr Climate Change Res, Bern, Switzerland; 3.Univ Bern, Mobiliar Lab Nat Risks, Bern, Switzerland; 4.SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 USA; 5.Swiss Fed Inst Technol, Inst Atmospher & Climate Sci, Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Roethlisberger, Matthias,Frossard, Linda,Bosart, Lance F.,et al. Recurrent Synoptic-Scale Rossby Wave Patterns and Their Effect on the Persistence of Cold and Hot Spells[J]. JOURNAL OF CLIMATE,2019,32(11):3207-3226. |
APA | Roethlisberger, Matthias,Frossard, Linda,Bosart, Lance F.,Keyser, Daniel,&Martius, Olivia.(2019).Recurrent Synoptic-Scale Rossby Wave Patterns and Their Effect on the Persistence of Cold and Hot Spells.JOURNAL OF CLIMATE,32(11),3207-3226. |
MLA | Roethlisberger, Matthias,et al."Recurrent Synoptic-Scale Rossby Wave Patterns and Their Effect on the Persistence of Cold and Hot Spells".JOURNAL OF CLIMATE 32.11(2019):3207-3226. |
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