Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0565.1 |
A Synoptic Climatology of Northern Hemisphere, Cold Season Polar and Subtropical Jet Superposition Events | |
Christenson, Croix E.; Martin, Jonathan E.; Handlos, Zachary J. | |
2017-09-01 | |
发表期刊 | JOURNAL OF CLIMATE
![]() |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:18 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Narrow, tropopause-level wind speed maxima known as jet streams or jets are among the most ubiquitous structural characteristics of Earth's atmosphere. Two species, the polar and subtropical jets, can be observed on any given day. The polar jet is tied, via eddy momentum flux convergence associated with extratropical wave development, to the troposphere-deep baroclinicity of the midlatitudes, while the subtropical jet is tied, by angular momentum constraints, to the poleward edge of the tropical Hadley cell. As a consequence of their different origins, the polar and subtropical jets are separated by both latitude and elevation. However, there are times when these two usually separate features become vertically superposed to form a single, intense jet core designated as a jet superposition or superposed jet. An objective method for identifying tropopause-level jets is employed in the construction of 50-yr cold season (November-March) synoptic climatologies of the Northern Hemisphere polar jet, subtropical jet, and jet superpositions. The analysis demonstrates that while superposition events are relatively rare, there are clear geographical maxima. Superpositions are most frequent in the western Pacific from December through February, with a secondary peak in southern North America and along its eastern seaboard. Consistent with expectations, the spatiotemporal maxima in jet superpositions appear to be coincident with maxima in the polar and subtropical jets. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000408613400008 |
WOS关键词 | POTENTIAL VORTICITY INVERSION ; ARCTIC TROPOPAUSE FOLD ; BETA-PLANE ; STREAM ; VARIABILITY ; DYNAMICS ; FRONTOGENESIS ; CONFLUENCE ; REANALYSIS ; ATMOSPHERE |
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/20735 |
专题 | 气候变化 |
作者单位 | Univ Wisconsin Madison, Dept Atmospher & Ocean Sci, Madison, WI 53706 USA |
推荐引用方式 GB/T 7714 | Christenson, Croix E.,Martin, Jonathan E.,Handlos, Zachary J.. A Synoptic Climatology of Northern Hemisphere, Cold Season Polar and Subtropical Jet Superposition Events[J]. JOURNAL OF CLIMATE,2017,30(18). |
APA | Christenson, Croix E.,Martin, Jonathan E.,&Handlos, Zachary J..(2017).A Synoptic Climatology of Northern Hemisphere, Cold Season Polar and Subtropical Jet Superposition Events.JOURNAL OF CLIMATE,30(18). |
MLA | Christenson, Croix E.,et al."A Synoptic Climatology of Northern Hemisphere, Cold Season Polar and Subtropical Jet Superposition Events".JOURNAL OF CLIMATE 30.18(2017). |
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