Structure, Variability, and Mean‐Flow Interactions of the January 2015 Quasi‐2‐Day Wave at Middle and High Southern Latitudes
Structure, Variability, and Mean‐Flow Interactions of the January 2015 Quasi‐2‐Day Wave at Middle and High Southern Latitudes
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2015年1月南半球中纬度和高纬度准二日波的结构、变异性和平均流量相互作用
DOI：
10.1029/2018jd029728
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Tsutsumi, Masaki
中科院分区：
文献类型：
--
作者：
Fritts, David C.;Iimura, Hiroyuki;Janches, Diego;Lieberman, Ruth S.;Riggin, Dennis M.;Mitchell, Nicholas J.;Vincent, Robert A.;Reid, Iain M.;Murphy, Damian J.;Tsutsumi, Masaki
利用23°S至76°S八个站点的流星和中频雷达风以及30°S至80°S的微波临边探测器（MLS）温度和位势高度测量，研究了2015年1月期间中层和低热层准2日波（Q2 DW）的结构、变率和平均流相互作用。该事件持续时间约20-25天，主周期约44-52小时，中、低纬度温度振幅可达16 K，纬向和纬向风振幅分别高达40和80 m/s。MLS测量能够定义平衡风，与中纬度地区的雷达风振幅和相位一致，振幅很大，并量化了各种Q2 DW模式对全波场的贡献。Q2 DW事件主要由向西向纬向波数3（W3）模式组成，但在其他向西模式W1、W2和W 4、东向模式E1和E2以及静止模式S 0中也有可测量的振幅。在二次模中，W1、W2和E2具有较大的振幅。推断出的MLS平衡风使得能够估计每种模态的Eliassen-Palm通量，以及累积纬向加速度，这些加速度与雷达风可用的较低高度处约35°S至70°S的雷达估计值合理一致。
The structure, variability, and mean‐flow interactions of the quasi‐2‐day wave (Q2DW) in the mesosphere and lower thermosphere during January 2015 were studied employing meteor and medium‐frequency radar winds at eight sites from 23°S to 76°S and Microwave Limb Sounder (MLS) temperature and geopotential height measurements from 30°S to 80°S. The event had a duration of ~20–25 days, dominant periods of ~44–52 hr, temperature amplitudes as large as ~16 K, and zonal and meridional wind amplitudes as high as ~40 and 80 m/s, respectively, at middle and lower latitudes. MLS measurements enabled definition of balance winds that agreed well with radar wind amplitudes and phases at middle latitudes where amplitudes were large and quantification of the various Q2DW modes contributing to the full wave field. The Q2DW event was composed primarily of the westward zonal wavenumber 3 (W3) mode but also had measurable amplitudes in other westward modes W1, W2, and W4; eastward modes E1 and E2; and stationary mode S0. Of the secondary modes, W1, W2, and E2 had the larger amplitudes. Inferred MLS balance winds enabled estimates of the Eliassen‐Palm fluxes for each mode, and cumulative zonal accelerations that were found to be in reasonable agreement with radar estimates from ~35°S to 70°S at the lower altitudes at which radar winds were available.
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DOI：
10.1016/0021-9169(95)00120-4
发表时间：
1996-09
影响因子：
1.9
作者：
C. Meek;A. Manson;S. Franke;W. Singer;P. Hoffmann;R. R. Clark-R.;T. Tsuda;Takuji Nakamura;M. Tsutsumi;M. Hagan;D. Fritts;J. Isler;Y. Portnyagin
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DOI：
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发表时间：
1995
期刊：
影响因子：
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作者：
Zhangai Luo;D. Fritts;R. Portmann;G. Thomas
通讯作者：
G. Thomas
DOI：
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发表时间：
1982
期刊：
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作者：
G. Nastrom;B. Balsley;D. A. Carter
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DOI：
10.1016/0021-9169(74)90180-9
发表时间：
1974-11
影响因子：
1.9
作者：
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通讯作者：
H. Muller;S. P. Kingsley
极地中间层观测到的准2日波
影响因子：
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作者：
S. Nozawa;S. Imaida;A. Brekke;C. Hall;A. Manson;C. Meek;S. Oyama;K. Dobashi;R. Fujii
通讯作者：
R. Fujii