2013年芦山<i>M</i><sub>S</sub>7.0地震前后甲烷排放时空演化分析

耿飞; 孟庆岩; 魏鸣; 卢显

doi:10.11939/jass.2017.03.008

2013年芦山M_S7.0地震前后甲烷排放时空演化分析

耿飞^1,2,
孟庆岩^2, ,,
魏鸣¹,
卢显³

1.
中国南京 210044 南京信息工程大学大气物理学院
2.
中国北京 100101 中国科学院遥感与数字地球研究所
3.
中国北京 100045 中国地震台网中心

基金项目:

国家自然科学基金 41471310

四川省科技支撑计划专项 2016JZ0027

科技部政府间国际科技创新合作重点专项 2016YEE0122200

科技部政府间国际科技创新合作重点专项(2016YEE0122200)、四川省科技支撑计划专项(2016JZ0027) 和国家自然科学基金(41471310) 联合资助

详细信息

通讯作者:
孟庆岩, e-mail: mengqy@radi.ac.cn

中图分类号: P315.72⁺4
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出版历程
- 收稿日期: 2016-11-03
- 修回日期: 2017-02-07
- 发布日期: 2017-04-30

Spatio-temporal revolution characteristics of methane emission before and after the 2013 Lushan M_S7.0 earthquake

1.
School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China
2.
Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China
3.
China Earthquake Networks Center, Beijing 100045, China

摘要

摘要: 为研究地震活动与大气甲烷浓度时空演变之间的关系，以芦山M_S7.0地震为例，基于极轨卫星AQUA上搭载的卫星大气红外探测器(AIRS)获取的甲烷数据产品，通过背景值差值法对该地震前后甲烷柱浓度信息、垂直浓度廓线信息及长时间序列变化信息进行提取，挖掘芦山地震前后甲烷异常排放的时空演化特征.结果表明：2013年1—4月芦山震中区存在明显的甲烷浓度升高；甲烷浓度时空演化趋势为初始排放→激增扩散→聚敛加强→相对减弱→震后排放→回复平静；震前震中区甲烷柱浓度为该地区2008年1月—2016年8月异常最显著的时段.因此认为芦山M_S7.0地震前甲烷排放浓度升高现象或为该地震的前兆信息.
- 芦山地震 /
- 异常 /
- 遥感 /
- 甲烷
Abstract: Taking the case of Lushan M_S7.0 earthquake, the spatio-temporal evolution characteristics of methane (CH₄) before and after the earthquake were studied using CH₄ data got from atmospheric infrared sounder (AIRS) instrument on AQUA satellite. Total volume of CH₄, CH₄ vertical profiles and long-time serial variation before and after the earthquake were analyzed by the background contents difference value method. The results showed that the CH₄ concentration increased significantly in the epicentral area from January to April, 2013. The evolution trend of CH₄ appeared as following: initially rose→increased abruptly and diffused→accumulated and reached to maximum→relatively attenuated→degassed after earthquake→returned to normal. The anomalies of CH₄ concentration observed before the earthquake have reached the maximum in epicentral area during the period from January 2008 to August 2016. The increase of CH₄ concentration before the earthquake was likely to be the precursor of M_S7.0 Lushan earthquake.
- Lushan earthquake /
- anomaly /
- remote sensing /
- CH₄

HTML全文

图 1 2013年3月中国大陆地区甲烷柱浓度异常分布

Figure 1. Distribution of total column methane concentration anomalies of Chinese mainland in March of 2013. Blue line is fault, and the dashed box is studied area

下载: 全尺寸图片幻灯片

图 2 芦山M_S7.0地震前后川滇地区月度甲烷柱浓度异常分布

Figure 2. The monthly anomalies fields of total column methane concentration in Sichuan-Yunnan region before and after Lushan M_S7.0 earthquake

下载: 全尺寸图片幻灯片

图 3 芦山M_S7.0地震前后震中区8天甲烷廓线异常分布

Figure 3. The eight days anomalies field of CH₄ profiles in the epicentral region before and after Lushan M_S7.0 earthquake

下载: 全尺寸图片幻灯片

图 4 2008年1月至2016年8月震中区甲烷柱浓度T_CH₄及异常幅值ΔT_CH₄

Figure 4. Total column concentration T_CH₄ and amomaly amplitude ΔT_CH₄ of methane in the epicentral region from January 2008 to August 2016

下载: 全尺寸图片幻灯片

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