摘要
在本文中,我们利用COSMIC掩星数据反演了南京地区5-40km自由大气的Brunt-Vaisala频率,对对流层顶逆温层的高度变化特征以及逆温层以下和逆温层以上的Brunt-Vaisala频率的变化特征进行了深入分析,并利用Hilbert-Huang变换对上述变化的主要周期进行了提取。我们发现,对流层顶逆温层的高度的值以及逆温层以下和逆温层以上的Brunt-Vaisala频率的值都会随着时间变化而产生明显的以年为主要周期的波动,且逆温层以下和逆温层以上的Brunt-Vaisala频率的波动相位大致相反。
In this article, we use COSMIC occultation data to retrieve Brunt-Vaisala frequencies of 5-40 km free atmosphere in Nanjing. The height variation characteristics of the tropopause inversion layer and Brunt-Vaisala frequencies below and above the inversion layer are analyzed in depth. The main periods of the above changes are extracted by Hilbert-Huang transformation. We find that the height of the tropopause inversion layer and Brunt-Vaisala frequency below and above the inversion layer will change over time with significant annual fluctuations as the main cycle, and the fluctuation phase of Brunt-Vaisala frequency below the inversion layer and above the inversion layer is approximately opposite.
作者
王林
WANG Lin(Hebei Qinhuangdao 91404 Force Meteorological Observatory,Qinhuangdao 066000,China)
出处
《价值工程》
2019年第9期171-173,共3页
Value Engineering
