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DOI | 10.1029/2017JD028128 |
Statistical Characteristics of Gravity Waves With Near-Inertial Frequencies in the Antarctic Troposphere and Lower Stratosphere Observed by the PANSY Radar | |
Minamihara, Y.1; Sato, K.1; Tsutsumi, M.2; Sato, T.3 | |
2018-09-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:17页码:8993-9010 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | Gravity waves (GWs) have temporally and spatially small scales. Observations of GWs have been limited especially in the polar region due to its harsh environment. The purpose of this study is to elucidate the statistical characteristics of GWs in the Antarctic troposphere and lower stratosphere based on the continuous data over a year from 1 October 2015 to 30 September 2016 using the full system of the Program of the Antarctic Syowa MST/IS Radar (PANSY) radar at Syowa Station (69.0 degrees S, 39.6 degrees E). Such continuous observations over a long duration are unprecedented for high-power Mesosphere-Stratosphere-Troposphere (MST) radars at any latitude. The frequency power spectra of horizontal wind fluctuations reveal a clear isolated maximum around the inertial frequency () in the lower stratosphere. A statistical analysis is performed, focusing on the GWs with near-inertial frequencies (NIGWs) that are dominant in the lower stratosphere. According to the results of hodograph analyses, there are a considerable proportion of NIGWs propagating energy downward in the upper troposphere during all seasons, as well as in the winter stratosphere above a height of 15km, whereas NIGWs with upward group velocities are dominant in the lower troposphere and the lowermost stratosphere. These results suggest that there are NIGW sources on the ground and around the tropopause during all seasons and in the stratosphere and/or above in winter. Plausible candidates for these sources are topography, the tropospheric jet, and the polar night jet. The statistical characteristics of NIGWs, such as horizontal phase velocity, provide powerful support for our inferences of wave sources. |
英文关键词 | gravity waves Antarctic atmosphere MST radar middle atmosphere |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445617500006 |
WOS关键词 | MU-RADAR ; MOMENTUM FLUX ; RADIOSONDE OBSERVATIONS ; WIND DISTURBANCES ; MACQUARIE ISLAND ; CLIMATE MODELS ; SYOWA STATION ; TROPOPAUSE ; PROPAGATION ; GENERATION |
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/33935 |
专题 | 气候变化 |
作者单位 | 1.Univ Tokyo, Dept Earth & Planetary Sci, Tokyo, Japan; 2.Natl Inst Polar Res, Tokyo, Japan; 3.Kyoto Univ, Grad Sch Informat, Dept Commun & Comp Engn, Kyoto, Japan |
推荐引用方式 GB/T 7714 | Minamihara, Y.,Sato, K.,Tsutsumi, M.,et al. Statistical Characteristics of Gravity Waves With Near-Inertial Frequencies in the Antarctic Troposphere and Lower Stratosphere Observed by the PANSY Radar[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(17):8993-9010. |
APA | Minamihara, Y.,Sato, K.,Tsutsumi, M.,&Sato, T..(2018).Statistical Characteristics of Gravity Waves With Near-Inertial Frequencies in the Antarctic Troposphere and Lower Stratosphere Observed by the PANSY Radar.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(17),8993-9010. |
MLA | Minamihara, Y.,et al."Statistical Characteristics of Gravity Waves With Near-Inertial Frequencies in the Antarctic Troposphere and Lower Stratosphere Observed by the PANSY Radar".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.17(2018):8993-9010. |
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