| 地震后水汽异常变化初探 |
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| 引用本文： | 王勇,任栋,娄泽生,郝振航.地震后水汽异常变化初探[J].大地测量与地球动力学,2019,39(9):881-883. |
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| 作者姓名： | 王勇 任栋 娄泽生 郝振航 |
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| 作者单位： | 天津城建大学地质与测绘学院,天津市津静路26号,300384;天津城建大学地质与测绘学院,天津市津静路26号,300384;天津城建大学地质与测绘学院,天津市津静路26号,300384;天津城建大学地质与测绘学院,天津市津静路26号,300384 |
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| 摘 要： | 研究东日本地震、汶川地震和玉树地震震中及其附近区域在地震前后的水汽时间序列变化。首先分析震中MODIS水汽序列和震中附近探空站点水汽序列在地震前后的变化；然后基于GNSS ZTD与水汽之间的高相关性，以GNSS ZTD代替GNSS水汽，讨论震源区周围IGS站点的ZTD序列变化。研究发现，震后震中及其附近区域水汽值变化出现异常，且距离越近所受影响越大；水汽不断聚积，达到峰值后发生降水。
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| 关 键 词： | 地震 水汽 GNSS 对流层延迟 |
Preliminary Study on Abnormal Changes of PWV after Earthquake |
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| WANG Yong,REN Dong,LOU Zesheng,HAO Zhenhang.Preliminary Study on Abnormal Changes of PWV after Earthquake[J].Journal of Geodesy and Geodynamics,2019,39(9):881-883. |
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| Authors: | WANG Yong REN Dong LOU Zesheng HAO Zhenhang |
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| Abstract: | The anomaly change of PWV after earthquakes is analyzed through the change of PWV time series in the epicenter of the east Japan, Wenchuan, and Yushu earthquakes. First, we analyze the change of MODIS PWV sequence in the epicenter and the change of radiosonde PWV sequence near the epicenter before and after the earthquake. Then, based on the high correlation between GNSS ZTD and PWV, for GNSS PWV replaced by GNSS ZTD, we analyze the change of GNSS ZTD sequence of IGS sites around the epicenter. It is found that after the earthquake, the change of PWV in or near the epicenter is abnormal, and the closer the distance, the greater change of PWV. For PWV accumulating continuously, the precipitation occurs after the peak of PWV. |
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| Keywords: | earthquake precipitable water vapor GNSS zenith tropospheric delay |
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