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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2023, Vol. 20, No. 2, pp. 144-152

Dynamics of perturbations in the lower atmosphere in seismically active regions of Asia

L.G. Sverdlik 1, 2 
1 Research Station RAS in Bishkek City, Bishkek, Kyrgyzstan
2 Kyrgyz–Russian Slavic University, Bishkek, Kyrgyzstan
Accepted: 10.04.2023
DOI: 10.21046/2070-7401-2023-20-2-144-152
The work presents the results of the study of atmospheric effects, which manifested themselves in an abnormal change in meteorological parameters in the upper troposphere and lower stratosphere (UTLS) during extreme seismic events. Using the capabilities of satellite remote sensing (global MERRA-2 reanalysis) to assess the effect of strong seismicity on the state of the atmosphere, an analysis of time series of temperature, as well as zonal and meridional wind speeds at all available isobaric levels in the range of altitudes of ~5–25 km was carried out. These parameters made it possible to trace the processes of formation and spatiotemporal transformation of perturbations coinciding in time with the processes of preparation and passage of strong earthquakes M = 7,3, recorded in the zone of the Alpine-Himalayan seismic zone in Iraq (November 12, 2017) and China (May 21, 2021). Isolation and identification of pre-seismic temperature perturbations was performed using a special algorithm. Comparison of UTLS temperature perturbation data with seismicity variations revealed abnormal variations lasting up to 5 days, which were formed ~1–2 days before the studied events. Temperature disturbances were manifested not only at the stage of preparation of strong earthquakes, but also in the post-seismic period. In the changes in the wind regime, pre-seismic effects were also revealed. An important result of the studies is the large similarity of the detected abnormal disturbances of meteorological parameters during the periods of preparation of two earthquakes, which can probably be considered as evidence of the interaction of the lithosphere and the atmosphere during periods of seismic activity.
Keywords: satellite measurements, temperature, wind speed, direction, earthquake, upper troposphere, lower stratosphere, STA/LTA criterion, integral parameter, anomaly
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