大气科学学报2017，Vol.40Issue(3)：401-411,11.DOI:10.13878/j.cnki.dqkxxb.20160504002
不同扰动场对大气重力波参数结果影响的初步探讨
A preliminary investigation on the atmospheric gravity wave parameters obtained from different disturbance fields
摘要
Abstract
How to obtain the atmospheric gravity wave parameters is one of the most important topics in atmospheric dynamic theory.By taking a thunder storm process on 6-8 August 2013 in northwest Shanxi province as an example in the paper and by using the commonly used second-order polynomial fitting,third-order polynomial fitring,fourth-order polynomial fitting and Bandpass filtering methods to obtain disturbance fields (denoted as SeOp,ThOp,FoOp and BpFp,respectively) from sounding data with high resolution,the paper conducted comparative analysis on the atmospheric gravity wave parameters obtained from those disturbance fields by using different methods.The results showed that different disturbance fields (second-order curve fitting,third-order curve fitting,fourth-order curve fitting and Bandpass filtering) exerted certain influence on the value and trend of the gravity wave parameters to different degrees.They exerted obvious effect on the value and trend of wave period,horizontal and vertical wavelength while posed little influence on the propagation direction,group velocity and phase velocity.By considering the dynamic characterisitcs of the thunder storm process during 6-8 Ausugst 2013,the gravity wave parameters obtained from SeOp and BpFp showed the highest reliability while the gravity wave parameter obtained from FoOp showed the lowest reliability.关键词
重力波参数/曲线拟合/滤波/雷阵雨/探空资料Key words
Gravity wave parameters/polynomial fitting/Bandpass filtering/thunder storm/sounding data引用本文复制引用
程胡华..不同扰动场对大气重力波参数结果影响的初步探讨[J].大气科学学报,2017,40(3):401-411,11.基金项目
总装青年科技基金项目(2014ZBTY4003) （2014ZBTY4003）
太原卫星发射中心科学基金项目(2015ZBTY4008) （2015ZBTY4008）
