Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-017-3844-1 |
Observational evidence of the downstream impact on tropical rainfall from stratospheric Kelvin waves | |
Zhang, Lei1; Karnauskas, Kristopher B.1,2; Weiss, Jeffrey B.2; Polvani, Lorenzo M.3,4 | |
2018-05-01 | |
发表期刊 | CLIMATE DYNAMICS
![]() |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:3775-3782 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Analysis of one continuous decade of daily, high-vertical resolution sounding data from five proximate islands in the western equatorial Pacific region reveals eastward and downward propagating Kelvin waves in the tropical stratosphere, with a zonal wave number one structure and a period of similar to 15 days. By defining an initiation index, we find that these waves are primarily generated over the western Pacific warm pool and South America-tropical Atlantic sector, consistent with regions of frequent deep convection. The zonal phase speed of the stratospheric Kelvin waves (SKWs) is relatively slow (similar to 10 m s(-1)) over the initiation region due to coupling with deep convection, and becomes much faster (similar to 30-40 m s(-1)) once decoupled from the downstream troposphere. SKWs have significant impacts on downstream tropical rainfall through modulation of tropopause height. The cold phase of SKWs at tropopause leads to higher tropopause heights and more convection in tropics-with opposite impacts associated with the warm phase. Downstream tropical precipitation anomalies associated with these SKWs also propagate eastward with the same speed and zonal scale as observed SKWs. Interannual variability of the amplitude of the SKWs is shown to be associated with the Quasi-Biennial oscillation (QBO); implications for predictability are discussed. |
英文关键词 | Stratosphere Kelvin waves Tropopause Tropical convection Sounding observations Intraseasonal variability Precipitation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000429650700036 |
WOS关键词 | QUASI-BIENNIAL OSCILLATION ; DEEP CONVECTION ; QBO ; TROPOPAUSE ; PRECIPITATION ; VARIABILITY ; TROPOSPHERE |
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/35509 |
专题 | 气候变化 |
作者单位 | 1.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 2.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA; 3.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY USA; 4.Columbia Univ, Dept Earth & Environm Sci, New York, NY USA |
推荐引用方式 GB/T 7714 | Zhang, Lei,Karnauskas, Kristopher B.,Weiss, Jeffrey B.,et al. Observational evidence of the downstream impact on tropical rainfall from stratospheric Kelvin waves[J]. CLIMATE DYNAMICS,2018,50:3775-3782. |
APA | Zhang, Lei,Karnauskas, Kristopher B.,Weiss, Jeffrey B.,&Polvani, Lorenzo M..(2018).Observational evidence of the downstream impact on tropical rainfall from stratospheric Kelvin waves.CLIMATE DYNAMICS,50,3775-3782. |
MLA | Zhang, Lei,et al."Observational evidence of the downstream impact on tropical rainfall from stratospheric Kelvin waves".CLIMATE DYNAMICS 50(2018):3775-3782. |
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