OBSERVATIONS OF SHORT PERIOD MESOSPHERIC WAVE PATTERNS: IN SITU OR TROPOSPHERIC WAVE GENERATION?
OBSERVATIONS OF SHORT PERIOD MESOSPHERIC WAVE PATTERNS: IN SITU OR TROPOSPHERIC WAVE GENERATION?
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短周期中层波模式的观测：原位波还是对流层波生成？
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
R. edwards
中科院分区：
文献类型：
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作者：
M. Taylor;R. edwards
在ALOHA-90战役期间，夏威夷毛伊岛获得了显示羟基(OH)夜辉发射中的波结构的近红外图像。对这场战役期间(3月25日和31日)的两个晚上的分析表明，广泛的、高度相干的线性波型的表观周期很短(分别为∼5分钟和10分钟)。这两个显示器都显示出大范围、长周期、高层大气波动扰动的现场击穿的几个特征。ALOHA的其他仪器也发现了支持这一机制的数据，它们两次都探测到了同时发生的长周期(1-2小时)中层波动扰动。然而，不能排除这些波的对流层来源。至少在3月25日，一股天气锋出现在∼1400公里范围内，具有有利的方位和位置。尽管它的范围相对较大，但背景风可能大大增加了波通过中间大气的路径长度。
Near infrared images showing wave structure in the hydroxyl (OH) nightglow emission have been obtained from Maui, Hawaii during the ALOHA-90 campaign. Analysis of two nights during this campaign (25 and 31 March) indicate extensive, highly coherent, linear wave patterns of very short apparent period (∼5 and 10 min respectively). Both displays exhibited several features characteristic of the in situ breakdown of a large scale, long period, upper atmospheric wave disturbance. Data in support of this mechanism was found by other ALOHA instruments which detected concurrent long period (1–2 hour) mesospheric wave disturbances on both occasions. However, a tropospheric source for these waves cannot be ruled out. At least on 25 March a weather front occurred at ∼1400 km range with a favourable orientation and location. Although its range was relatively large, background winds may have substantially increased the path length of the waves through the intervening atmosphere.