Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025834 |
Frequency spectra and vertical profiles of wind fluctuations in the summer Antarctic mesosphere revealed by MST radar observations | |
Sato, Kaoru1; Kohma, Masashi1; Tsutsumi, Masaki2,3; Sato, Toru4 | |
2017 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:1页码:43543 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | Continuous observations of polar mesosphere summer echoes at heights from 81-93 km were performed using the first Mesosphere-Stratosphere-Troposphere/Incoherent Scatter radar in the Antarctic over the three summer periods of 2013/2014, 2014/2015, and 2015/2016. Power spectra of horizontal and vertical wind fluctuations, and momentum flux spectra in a wide-frequency range from (8 min)(-1) to (20 days) (-1) were first estimated for the Antarctic summer mesosphere. The horizontal (vertical) wind power spectra obey a power law with an exponent of approximately -2 (-1) at frequencies higher than the inertial frequency of (13h)(-1) and have isolated peaks at about 1 day and a half day. In addition, an isolated peak of a quasi-2 day period is observed in the horizontal wind spectra but is absent from the vertical wind spectra, which is consistent with the characteristics of a normal-mode Rossby-gravity wave. Zonal (meridional) momentum flux spectra are mainly positive (negative), and large fluxes are observed in a relatively low-frequency range from (1 day)(-1) to (1h)(-1). A case study was performed to investigate vertical profiles of momentum fluxes associated with gravity waves and time mean winds on and around 3 January 2015 when a minor stratospheric warming occurred in the Northern Hemisphere. A significant momentum flux convergence corresponding to an eastward acceleration of similar to 200ms(-1)d(-1) was observed before the warming and became stronger after the warming when mean zonal wind weakened. The strong wave forcing roughly accorded with the Coriolis force of mean meridional winds. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393877800001 |
WOS关键词 | INERTIA-GRAVITY WAVES ; GENERAL-CIRCULATION MODEL ; MIDDLE ATMOSPHERE ; MU RADAR ; ECHOES PMSE ; SPONTANEOUS RADIATION ; SYOWA STATION ; 2-DAY WAVE ; MESOPAUSE ; DISTURBANCES |
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/32567 |
专题 | 气候变化 |
作者单位 | 1.Univ Tokyo, Dept Earth & Planetary Sci, Tokyo, Japan; 2.Natl Inst Polar Res, Tachikawa, Tokyo, Japan; 3.Grad Univ Adv Studies SOKENDAI, Tachikawa, Tokyo, Japan; 4.Kyoto Univ, Dept Commun & Comp Engn, Kyoto, Japan |
推荐引用方式 GB/T 7714 | Sato, Kaoru,Kohma, Masashi,Tsutsumi, Masaki,et al. Frequency spectra and vertical profiles of wind fluctuations in the summer Antarctic mesosphere revealed by MST radar observations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(1):43543. |
APA | Sato, Kaoru,Kohma, Masashi,Tsutsumi, Masaki,&Sato, Toru.(2017).Frequency spectra and vertical profiles of wind fluctuations in the summer Antarctic mesosphere revealed by MST radar observations.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(1),43543. |
MLA | Sato, Kaoru,et al."Frequency spectra and vertical profiles of wind fluctuations in the summer Antarctic mesosphere revealed by MST radar observations".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.1(2017):43543. |
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