Applying partial correlation method to analyzing the correlation between ionospheric NmF2 and height of isobaric level in the lower atmosphere  

作　　者：XU GuiRong WAN WeiXing NING BaiQi 

机构地区：[1]Institute of Geoloqy and Geophysics, Chinese Academy of Sciences, Beijing 100029, China [2]Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China [3]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Science Bulletin》2007年第17期2413-2419,共7页

基　　金：Supported by the KIP Pilot Project (Grant No. KZCX3-SW-144);the National Natu-ral Science Foundation of China (Grant No. 40636032);National Important Basic Research Project (Grant No. 2006CB806306)

摘　　要：On the basis of a multiple linear regression model performed for ionospheric NmF2, partial correlation method is first applied to investigating the relation between NmF2 and h (the height of isobaric level) in the lower atmosphere over Wuhan, China during 1957―2004. The results show that partial correlation method can eliminate the influences of solar and geomagnetic activities as well as the seasonal varia- tion factors and reveal the true correlation between NmF2 and h in the lower atmosphere. A weak posi- tive correlation between NmF2 and h is found in the middle stratosphere. In addition, by comparing the partial correlation coefficients between NmF2 and its influence factors, we find that NmF2 is mainly affected by solar activity and the seasonal variation factors, and weakly affected by geomagnetic ac- tivity, but hardly affected by h in the lower atmosphere. The study suggests that partial correlation method is a helpful tool for investigating the correlation between ionospheric parameter and its influ- ence factors.On the basis of a multiple linear regression model performed for ionospheric NmF2, partial correlation method is first applied to investigating the relation between NmF2 and h （the height of isobaric level） in the lower atmosphere over Wuhan, China during 1957--2004. The results show that partial correlation method can eliminate the influences of solar and geomagnetic activities as well as the seasonal variation factors and reveal the true correlation between NmF2 and h in the lower atmosphere. A weak positive correlation between NmF2 and h is found in the middle stratosphere. In addition, by comparing the partial correlation coefficients between NmF2 and its influence factors, we find that NmF2 is mainly affected by solar activity and the seasonal variation factors, and weakly affected by geomagnetic activity, but hardly affected by h in the lower atmosphere. The study suggests that partial correlation method is a helpful tool for investigating the correlation between ionospheric parameter and its influence factors.

关 键 词：低层大气 偏相关方法 线性回归模型 电离层 

分 类 号：P401[天文地球—大气物理学与大气环境]