Analysis of mountain waves’ characteristics obtained by high-resolution numerical modeling on Eastern Siberia and Russian Far East

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Abstract

Forecasting of possible locations, intensity, vertical and horizontal propagation of mountain waves (MW) is one of the main problems to ensure flight safety. This is very important in the complete absence predictions’ methods on the territory of Russia in generally and, especially, in Far-Eastern region. Main problem of the MW forecasting is almost complete absence of MW observations and instrumental measurement of their characteristics. In the article, approach to conformity assessment of simulated MW parameters (location, intensity, vertical and horizontal propagation) to real characteristics which are approximately determined by satellite images of lenticular clouds (Sc и Ac lenticularis) and atmospheric sounding is presented. It is shown that characteristics of simulated MW by the Weather Research and Forecasting model with grid spacing of 1 km are close to actual values. Possibilities to calibrate parameters of simulated MW calculated on the 5-km grid by values obtained on 1-km grid are discussed.

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About the authors

Eugenia M. Verbitskaya

Far Eastern Regional Hydrometeorological Research Institute

Author for correspondence.
Email: werbaem@gmail.com
ORCID iD: 0009-0006-5776-9736

Candidate of Sciences in Geography, Leading Researcher

Russian Federation, Vladivostok

Stanislav O. Romanskiy

Far Eastern Regional Hydrometeorological Research Institute

Email: khvrom@ya.ru
ORCID iD: 0000-0001-6613-6881

Candidate of Sciences in Physics and Mathematics, Senior Researcher

Russian Federation, Vladivostok

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Supplementary files

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2. Fig. 1. Fragment of the image taken by the Aqua spacecraft (USA) at about 3:00 UTC on March 9, 2021. Severo-Kurilsk is indicated by the black dot.

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3. Fig. 2. Cloud cover according to Himawari-8 spacecraft (Japan) data on March 9, 2021.

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4. Fig. 3. Model field of streamlines on a grid with a step of 1 km: a – at 3 am UTC, b – at 10 am UTC on March 9, 2021. The thick straight line indicates the direction of the section through the summit of Alaid volcano (height in the model is 2066 m), along which the vertical profiles of the potential temperature and wind fields presented below were constructed.

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5. Fig. 4. Vertical profiles of the model potential temperature (K), wind speed (m/s) and vertical velocity (ω, m/s) in the layer up to a height of 8000 m: a – at 0:50 UTC, b – at 3:00 UTC, c – at 5:50 UTC. The solid line indicates the potential temperature, the dotted line – the wind speed. The terrain is shown by shading.

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