急流与低层大气重力波能量的相关性研究

通过分析武汉(30.5oN, 114oE)上空2000至2004年的Radiosonde常规观测数据, 对当地对流层(1~10 km)与低平流层(18~25km)的某些惯性重力波特征进行了研究, 发现重力波能量与急流强度变化之间存在显著的相关. 同时分析了海口(20oN, 114oE)(2000至2004年)、北京(40oN, 116oE)(2001年12月至2003年2 月)的Radiosonde观测数据并进行了比较, 发现较高纬度地区的相关性明显大于低纬度地区. 通过对武汉地区2006年1月5天Radiosonde加密观测数据的分析, 讨论了重力波动能与势能的高度变化, 进一步发现纬向风的垂直剪切与急流中心的分布分别与重力波势能和动能的强弱分布相对应. 

Research on Correlation Between Gravity Waves Energy and Jet

By analyzing the routine Radiosonde data obtained at Wuhan (30.5oN, 114oE) from 2000 to 2004, some characteristics of inertial gravity wave in Troposphere and Lower Stratosphere (TLS) were studied, and a strong correlation between the variation of gravity wave energy and jet intensity was found. Similar result of Wuhan was obtained by analyzing the routine Radiosonde data obtained at Haikou (20oN, 114oE) and Beijing (40oN, 116oE), and stronger correlation was found in higher latitude area. An intensive Radiosonde observation at Wuhan, which lasted 5 days in Jan 2006, was conducted to examine the variation with altitude of gravity wave kinetic energy and potential energy, and it was demonstrated that the excitation of gravity wave in TLS is attributed to jet (zonal wind shear), which suggests that it's a main excitation source of gravity wave in lower atmosphere.