Observations of 2-dimensional airglow structure and Na density from the ALOHA, October 9, 1993 ‘storm flight’
Observations of 2-dimensional airglow structure and Na density from the ALOHA, October 9, 1993 ‘storm flight’
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1993 年 10 月 9 日“风暴飞行”中 ALOHA 的二维气辉结构和 Na 密度观测
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
P. Espy
中科院分区：
文献类型：
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作者：
G. Swenson;P. Espy
1993年10月9日，NCAR Electra飞机在毛伊岛西北方向的对流层低压系统上进行了7小时的飞行。在毛伊岛西北约900公里处遇到了一个非常明亮（强度振幅>50%）的OH波（水平波长约200公里）。在相同位置，激光雷达测量的OH体积加权Na柱密度增加了4倍。OH图像显示，波相锋是东北-西南方向，类似于对流层气团边界，位于毛伊岛西北约2000公里。这种“壁”波在东南方向的视相速度（v）为75 ms−1，并于3 1/4小时后在毛伊岛哈雷阿卡拉上空观测到。“墙”似乎代表了一个广泛的短水平波长结构的南部边界，具有类似的相位前对齐。这种结构最初的振幅很弱，但在遇到壁后101小时就完全发展起来了。OH图像的细节，强度和Na结构与此事件进行了总结。
On October 9, 1993, observations were made from the NCAR Electra aircraft during a 7 hour flight towards a tropospheric low pressure system NW of Maui. A very bright (>50% intensity amplitude) OH wave (∼200 km horizontal wavelength) was encountered ∼900 km NW of Maui. The OH volume weighted Na column density measured by the lidar increased 4-fold at the same location. OH imagery showed the wave phase front was aligned NE-SW, similar to the tropospheric airmass boundary which was located ∼2000 km NW of Maui. This ‘wall’ wave had an apparent phase velocity (vϕ) of 75 ms−1 toward the SE and was observed overhead Haleakala, Maui ∼3 1/4 hours later. The ‘wall’ appeared to represent the southern boundary for an extensive short horizontal wavelength structure, with a similar phase front alignment. This structure had weak amplitudes initially but was fully developed ∼1 hour after encountering the wall. The details of OH imagery, intensity, and Na structure associated with this event are summarized.