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Alternative TitleSeasonal Variation of Atmospheric Temperature and Gravity Wave Activity over Beijing Area
郭文杰; 闫召爱; 胡雄; 郭商勇; 程永强; 郝文泽
Source Publication空间科学学报
Keyword激光雷达 大气温度 重力波 势能密度
Other AbstractBy using Rayleigh lidar data, the seasonal variations of atmospheric temperature and gravity wave activity at 30~70km height over Beijing area are analyzed. Results show that the atmospheric temperature has an obvious annual cycle variation. The highest temperature in the stratopause appears in June or July, which is about 270 K. The lowest temperature at 70 km height of the middle layer also occurs in June or July, which is about 200 K. Taking the data of 14 October 2014 as an example to analyze the potential energy density of gravity wave, we find that dissipation exists in the potential energy of gravity waves under 50 km height, while gravity waves propagate up with no dissipation over 50 km height. Using the average potential energy density at 35~50 km height, the seasonal variation of the gravity waves activities intensity is analyzed. The gravity waves activities have an obvious annual cycle. The average potential energy density is 18 J·kg~(-1) and 8 J·kg~(-1) in winter and summer respectively. The gravity waves activities intensity in winter are about two times of that in summer. In addition, the variation of gravity waves potential energy density with height in spring, summer, autumn and winter are analyzed. The analysis shows that the potential energy density of gravity waves is changing with different seasons and heights.
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Document Type期刊论文
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GB/T 7714
郭文杰,闫召爱,胡雄,等. 北京地区大气温度及重力波活动的季节变化[J]. 空间科学学报,2017,37(2):177-184.
APA 郭文杰,闫召爱,胡雄,郭商勇,程永强,&郝文泽.(2017).北京地区大气温度及重力波活动的季节变化.空间科学学报,37(2),177-184.
MLA 郭文杰,et al."北京地区大气温度及重力波活动的季节变化".空间科学学报 37.2(2017):177-184.
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