首页 >  2018, Vol. 22, Issue (s1) : 174-180

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全文摘要次数: 1480 全文下载次数: 34
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DOI:

10.11834/jrs.20187237

收稿日期:

2017-06-16

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昆仑山Ms8.1地震前后大气温度垂直分层变化特征研究
1.中国地震台网中心, 北京 100045;2.防灾科技学院 防灾工程系, 燕郊 101601
摘要:

研究引潮力的相位变化周期与发震的关系,进而确定地震大气温度增强异常识别的背景指示时间,采用大气分层技术,处理美国国家环境中心的NCEP大气温度数据,分析了昆仑山MS8.1地震前后不同高度层的大气温度垂直分布动态演化,结果显示:地震发生时引潮力值所处最大振幅相位附近,反映引潮力对本次地震的发生具有触、诱发的作用;孕震区地表及其上附多层大气热变化经历震前起始增温,震后消亡的连续时间演变过程,增温区集中在地震活动断裂带及其附近区域,呈现出与构造紧密关联的非均匀加热,与岩石受力,由形变—破裂过程中向外热辐射变化过程相吻合,表明大气增温与昆仑山地震活动相关;热增强表现出自下而上的从地表开始增温,并随大气运动抬升扩散,在一定高度的高空逐渐消亡的过程,符合地面对大气加热导致大气升温、抬升、扩散、消亡的大气热动力学特性,表明下垫面构造运动是本次温度异常变化的主控原因;大气增温过程与引潮力(低值—高值)的变化过程具有一定的同步性,显示引潮力为地震大气温度异常识别过程中,背景温度选择提供具有力学含义、可预先计算获得的时间指示,而通过引潮力周期获得的大气温度变化反映了临震构造应力的变化,将引潮力变化与大气温度垂直分层分析结合,将有助于区分地震热异常与非震热异常。

Evolution characteristics of multiple stratification air temperature in vertical of Kunlun Mountains Ms8.1 earthquake
Abstract:

The paper analyzed the relationship between an earthquake and a celestial tide-generating force. We selected the background that indicates the time for the research of the abnormal enhancement in identifying the atmospheric temperature rise caused by an earthquake based on the phase change cycle of tidal force. Then, with the use of atmospheric stratification, which is integrated with atmospheric temperature data from the National Center for Environmental Prediction, the air temperature evolution of several different levels in the vertical direction before and after the MS8.1 Kunlun Mountains earthquake was analyzed. Results show that the earthquake occurred when the tidal force value was near the maximum amplitude phase. Thus, the tidal force could trigger an earthquake near land surfaces and upper multi-layers. The warming areas are mainly concentrated near active faults, thereby exhibiting non-uniform heating procession. The temperature increased to a continuous evolution procession of warming before the earthquake and recession after the earthquake. It obeyed the rule of thermal rise procession of rock broken under stress loading. Thus, the increase in temperature was related to the activities of the regional fault. Meantime, the air temperature performed a warm procession, that is, the surface air is warmed by land, uplifted by heat flux, and cooled and dissipated in the sky. It is consistent with the dynamic diffusion principle of atmospheric air thermal warming by land in the vertical direction. The tectonic activity is the main cause of the abnormal change in temperature. Finally, the atmospheric warming process stepped with the tidal force (from low phase to high phase) change process. Therefore, the tide force not only delivered a mechanical basis and calculated the time to select the background in advance in research on air temperature warming during an earthquake but also showed that the atmosphere temperature change, according to the tidal force change cycle, could reflect the change in tectonic stress prior to an impending earthquake. Combining the analysis of the tidal force change and the analysis of atmospheric vertical temperature stratification distinguishes the increase in air temperature anomalies caused by the earthquake from that which is not caused by an earthquake.

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