| 基于小波变换的河北省GPS PWV与PM2.5的相关性分析研究 |
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| 引用本文： | 刘严萍,王勇,李江波.基于小波变换的河北省GPS PWV与PM2.5的相关性分析研究[J].大地测量与地球动力学,2017,37(3):276-281. |
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| 作者姓名： | 刘严萍 王勇 李江波 |
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| 摘 要： | 以2014-01~03的河北省GPS和PM2.5观测数据为例，利用小波变换方法开展GPS水汽和PM2.5浓度的相关性分析。结果表明，低频系数重构的GPS水汽与PM2.5浓度序列较好地反映了两者之间的正相关特性；D7高频信号（128~256 h）及D7与D6高频信号（64~256 h）重构的GPS水汽与PM2.5浓度的相关性较原始序列的相关性有较大提高；对于持续7 d的重度雾霾过程，由第7层和第6层高频系数重构的GPS水汽序列与PM2.5浓度序列的相关性达到0.890；不同时刻水汽变化对PM2.5浓度观测的影响，在水汽变化波动较大时段，水汽与PM2.5浓度的相关性为正；对于水汽变化波动较小时段，由于水汽与PM2.5浓度峰值时刻的差异，水汽与PM2.5浓度序列的相关性则不明显。
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| 关 键 词： | GPS 水汽 PM2.5 小波变换 |
Correlation Analysisof GPS PWV and PM2.5 of Hebei Province Based on Wavelet Transform |
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| LIU Yanping,WANG Yong,LI Jiangbo.Correlation Analysisof GPS PWV and PM2.5 of Hebei Province Based on Wavelet Transform[J].Journal of Geodesy and Geodynamics,2017,37(3):276-281. |
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| Authors: | LIU Yanping WANG Yong LI Jiangbo |
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| Abstract: | PWV (precipitable water vapor) is one of the meteorological factors that affects PM2.5 (particulate matter 2.5)concentration. According to the GPS and PM2.5 concentration observation data of Hebei province from January to March 2014, we analyze the correlation of GPS PWV and PM2.5 concentration based on the method of wavelet transform. First, we decompose and reconstruct GPS PWV and PM2.5 concentration series using wavelet transform method.The GPS PWV and PM2.5 concentration series reconstructed by the low frequency coefficientsreflects the positive correlation between PM2.5 and PWV. The correlation coefficients between PWV and PM2.5 concentration reconstructed by the high frequency coefficients D7 or D7 add D6 are higher than that of the original sequence. Second, we analyze the effect of PM2.5 concentration change based on the local change of PWV.The correlation coefficient between GPS PWV and PM2.5 concentration series reconstructed by the high frequency coefficients D7 add D6 amounted to 0.890. Finally, we analyze the effect of PM2.5 concentration based on different period PWV series. There is asignificantly positive correlation between PWV and PM2.5 concentration during the period of large fluctuation of PWV, while a not obvious positive correlation between PWV and PM2.5 concentration during the period of small fluctuation of PWV. |
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| Keywords: | GPS precipitable water vapor PM2 5 wavelet transform method |
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