Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-5993-2019 |
Mesospheric semidiurnal tides and near-12 h waves through jointly analyzing observations of five specular meteor radars from three longitudinal sectors at boreal midlatitudes | |
He, Maosheng; Chau, Jorge Luis | |
2019-05-07 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:9页码:5993-6006 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | In the last decades, mesospheric tides have been intensively investigated with observations from both groundbased radars and satellites. Single-site radar observations provide continuous measurements at fixed locations without horizontal information, whereas single-spacecraft missions typically provide global coverage with limited temporal coverage at a given location. In this work, by combining 8 years (2009-2016) of mesospheric winds collected by five specular meteor radars from three different longitudinal sectors at boreal midlatitudes (49 +/- 8.5 degrees N), we develop an approach to investigate the most intense global-scale oscillation, namely at the period T = 12 +/- 0.5 h. Six waves are resolved: the semidiurnal westward-traveling tidal modes with zonal wave numbers 1, 2, and 3 (SW1, SW2, SW3), the lunar semidiurnal tide M2, and the upper and lower sidebands (USB and LSB) of the 16 d wave nonlinear modulation on SW2. The temporal variations of the waves are studied statistically with a special focus on their responses to sudden stratospheric warming events (SSWs) and on their climatological seasonal variations. In response to SSWs, USB, LSB, and M2 enhance, while SW2 decreases. However, SW1 and SW3 do not respond noticeably to SSWs, contrary to the broadly reported enhancements in the literature. The USB, LSB, and SW2 responses could be explained in terms of energy exchange through the nonlinear modulation, while LSB and USB might previously have been misinterpreted as SW1 and SW3, respectively. Besides, we find that LSB and M2 enhancements depend on the SSW classification with respect to the associated split or displacement of the polar vortex. In the case of seasonal variations, our results are qualitatively consistent with previous studies and show a moderate cor-relation with an empirical tidal model derived from satellite observations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467228000001 |
WOS关键词 | POLAR VORTEX ; ROSSBY WAVES ; LOW-LATITUDE ; LUNAR TIDE ; MIDDLE ; ATMOSPHERE ; WARMINGS ; PHASE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/183171 |
专题 | 地球科学 |
作者单位 | Rostock Univ, Leibniz Inst Atmospher Phys, Kuhlungsborn, Germany |
推荐引用方式 GB/T 7714 | He, Maosheng,Chau, Jorge Luis. Mesospheric semidiurnal tides and near-12 h waves through jointly analyzing observations of five specular meteor radars from three longitudinal sectors at boreal midlatitudes[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(9):5993-6006. |
APA | He, Maosheng,&Chau, Jorge Luis.(2019).Mesospheric semidiurnal tides and near-12 h waves through jointly analyzing observations of five specular meteor radars from three longitudinal sectors at boreal midlatitudes.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(9),5993-6006. |
MLA | He, Maosheng,et al."Mesospheric semidiurnal tides and near-12 h waves through jointly analyzing observations of five specular meteor radars from three longitudinal sectors at boreal midlatitudes".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.9(2019):5993-6006. |
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