Avtandil Amiranashvili

Tbilisi State University | TSU · Mikheil Nodia Institute of Geophysics

Results of modeling of the distribution of monthly mean max hail damage to vineyards (HDV) and their 99% values of the lower and upper levels (HDV_Low, HDV_Upp) on the territory of Kakheti (Georgia) are presented. Calculations have been carried out using data of the freezing level in the atmosphere and radar measurements of hail max sizes in clouds...

Weather and climate are two main factors that determine the bioclimatic resources of a territory and, accordingly, the degree of its suitability for the organization and development of the resort and tourism industry. Early studies used a variety of climate indices for tourism. In recent years, the so-called Holiday Climate Index (HCI), which is a...

The global climate change, driven by natural processes and increasing human activities, is especially significant for Georgia. The region is experiencing increases in temperature, desertification, redistribution of precipitation, and a rise in the frequency and severity of extreme weather events. Georgia’s complex topography and its proximity to th...

The results of a statistical analysis of the number of days with hail during the warm half-year in Tbilisi from 1891 to 2021 are presented. The temporal variability of the measured values of the number of days with hail, as well as the moving averages of the number of hail days for 3, 5, 7, 9, and 11 years, has been studied. It is found that the ti...

Catastrophic floods of the river are described. Kura and its tributaries, which caused enormous damage and casualties. It is noted that the increase in damage is caused by an increase in the frequency of high rains, strong anthropogenic changes in the underlying surface, as well as a decrease in the infiltration capacity of the soil and the water p...

The results of the detailed statistical analysis of the daily mean and max wind speed for Tbilisi from January 1, 1971 to December 31, 2016 are presented. In the studied period of time, the range of changes in the average daily wind speed was 0-14.9 m/s, and the maximum-up to 41.0 m/s. The repeatability of the average daily and maximum wind speed i...

The results of a statistical analysis of daily, total by days of the week and monthly data on officially reported deaths cases from the new coronavirus COVID-19 in the countries of the South Caucasus (Armenia, Azerbaijan, Georgia) from March 12, 2020 to May 31, 2022 are presented. All data are normalized per 1 million populations (mortality rate, h...

In this work results of the next statistical analysis of the daily data associated with New Coronavirus COVID-19 infection of confirmed (C), recovered (R), deaths (D) and infection rate (I) cases of the population of Georgia in the period from January 01, 2022 to March 31, 2022 are presented. It also presents the results of the analysis of monthly...

The lockdown introduced in Georgia on November 28, 2020 contributed to positive trends in the spread of COVID-19 until February - the first half of March 2021. Then, in April-May 2021, the epidemiological situation worsened significantly, and from June to the end of December COVID - situation in Georgia was very difficult. In this work results of t...

Tskaltubo is one of the oldest balneological resorts in Georgia. The city is located in the gorge of the river Tskaltubostskali at an altitude of 95-150 meters above sea level. To the north-east, the city is bordered by the southern slope of the Samgurali Range (Greater Caucasus Mountains), and to the south by the Colchis Plain, which opens to the...

The lockdown introduced in Georgia on November 28, 2020 brought positive results. There were clearly positive tendencies in the spread of COVID-19 to February - first half of March 2021. However, in April-May 2021 there was a significant deterioration in the epidemiological situation. From June to August 2021, the epidemiological situation with Cov...

The lockdown introduced in Georgia on November 28, 2020 brought positive results. There are clearly positive tendencies in the spread of COVID-19 to February - first half of March 2021. However, in April-May 2021 there was a significant deterioration in the epidemiological situation. In this work results of the next statistical analysis of the dail...

Tskaltubo is one of the oldest balneological resorts in Georgia. The city is located in the gorge of the river Tskaltubostskali at an altitude of 95-150 meters above sea level. To the north-east, the city is bordered by the southern slope of the Samgurali Range (Greater Caucasus Mountains), and to the south by the Colchis Plain, which opens to the...

In the autumn - winter period of 2020, very difficult situation arose in Georgia with the course of the pandemic of the New Coronavirus COVID-19. In particular, in November-December period of 2020, Georgia eight days was rank a first in the world in terms of COVID-19 infection rate per 1 million populations. In this work results of a statistical an...

Preliminary results of the study of the influence of the mean monthly sum of atmospheric precipitation on landslides in Georgia are presented. In particular, it was found that with an increase in the monthly amount of atmospheric precipitation, there is a linear tendency for an increase in the number of landslides.

The paper presents the results of a statistical analysis of such parameters of hail processes for separate municipalities of Kakheti in the period from 2016 to 2019, as: the maximum height of hail clouds, the maximum diameter of hailstone in clouds, the number of hail clouds of various categories, repetition of hail clouds of various categories, th...

The paper considers the results of the study of the connection between annual variations of intensity of galactic cosmic rays and the changeability of the total cloudiness, atmospheric precipitation and air temperature in 1966-2015 in Tbilisi. The statistical characteristics of the indicated parameters (trends, random component, linear correlations...

In the article historical material about the works in the field of physics of the atmosphere and the active actions on the natural processes in Georgia is given. Specific information about theoretical and practical works on the periods carried out in this sphere is also given.

Preliminary results of the study of the relationship between the variability of the mean annual sum of atmospheric precipitation and landslide processes in Georgia for 32 years are presented. In particular, it was found that with an increase in the annual sum of atmospheric precipitation, the tendency of increase in the number of landslides is obse...

The statistical analysis of the daily maximum speed of wind in the days without hail processes W(I) and in the days with hail processes W(II) for 13 points of Kakheti in the period from 1 April through 31 October 2017-2019 is represented. In particular, the following results are obtained: mean values of W(I) change from 1.3 m/sec to 8.3 m/sec, mean...

Some results of anti-hail works in Kakheti into 2016-2019 are presented. Period of observation: April-October, 2016-2019. The area of shielded from the hail territory-800000 hectares, including total area of agricultural land-565000 hectares. In particular, the mean annual values of some characteristics of hail processes and parameters of active ac...

A comparative analysis of data on the monthly values of Tourism Climate Index (TCI) and Holiday Climate Index (HCI) in Tbilisi is presented. Period of observation-1956-2015. Average monthly values of HCI for the entire observation period varied from 62.0 ("Good", January) to 83.8 ("Excellent", May). As in the case with the TCI, according to the HCI...

Results of a comparative statistical analysis of the daily data associated with New coronavirus COVID-19 infection of confirmed cases (Č) of the population in Georgia (GEO), Armenia (ARM), Azerbaijan (AZE), Turkey (TUR) and Russia (RUS) amid a global pandemic (WLD) in the period from March 14 to July 31, 2020 are presented. The analysis of data is...

The preliminary results of a comparative statistical analysis of the weekly mean data associated with coronavirus COVID-19 infection of confirmed, recovered and fatal cases of the population in Georgia, Armenia, Azerbaijan, Turkey and Russia amid a global pandemic in the period from March 14 to July 31, 2020 are presented.

At the end of 2019, a novel coronavirus COVID-19 emerged in Wuhan, China and later spread throughout the world, including Georgia. To control the rapid dispersion of the virus, Georgia, as another countries has imposed national lockdown policies to praxise social distancing, restriction of automobile traffic, industrial enterprises, etc. This has l...

The statistical analysis of the daily maximum speed of wind (W) for 13 points of Kakheti in the period from 1 January 2017 through 31 December of 2019 is represented. In particular, the following results are obtained: mean monthly and seasonal (warm and cold half-years, year) values of W for all stations during entire period of observations are cal...

Представлены результаты статистического анализа изменчивости месячных сумм атмосферных осадков в Тианети (Грузия) в период с 1956 по 2015 гг. В частности, получено, что в указанный период времени в январе, феврале, апреле и с октября по декабрь наблюдается неизменностьюрежима осадков. В марте и с мая по сентябрь отмечаются отрицательные линейные тр...

В работе представлены некоторые результаты исследований ионизационного состояния воздушной среды в различных районах Северного Кавказа и Грузии, проведенных в последние годы.

The cave "Tetra" is located in the northern part of health resort Tskhaltubo. Taking into account the microclimatic and ionizing properties of the cave (the high concentration of light ions) at the beginning of the seventieth years of the past century it was used for treating the patients with the respiratory and cardiovascular system. During the e...

Представлены результаты исследования особенностей вариации концентрации легких ионов и их связей с содержанием в воздухе радона и субмикронных аэрозолей в условиях сильно загрязненной местности на примере города Тбилиси по данным о среднедекадных значениях исследуемых параметров в период 2010-2011 гг. (72 декады, с 9 до 17-18 ч).

The importance of study of the light ions content in the atmosphere is well known. The content of light ions in the atmosphere plays important role in molding of the physiological state of population. In this work some results of studies of the influence of landscape on the ionizing state of air environment in different regions of Georgia in recent...

A statistical analysis of data on monthly and seasonal values of air temperature and precipitation in Tbilisi from 1844 to 2018 was carried out. Trends of air temperature and precipitation in three period of year (year, cold and warm seasons) for 175 year observations is study. Comparison of monthly and seasonal mean values of air temperature and p...

Analysis of scientific and practical works on the artificial impact on the weather in Georgia in the past and at the present time (combating hailstorms, regulating the thunderstorm activity of clouds, artificial precipitation, etc.). The prospects for further development of these works are discussed.

Blizzards will do essential damage to the mountain and alpine regions of Georgia. Blizzards especially damages agriculture, is caused the uneven redistribution of snow and are created the bare sections of the pastures, which cause the freezing of winter cultures and the erosion of soil. In the regions, where winter pastures are arranged, blizzards...

The detailed information about such characteristics of hail process in Georgia and Azerbaijan on 28 May, 2019 as: the maximum diameter of hail stones in the cloud and on the earth's surface, trajectory and velocity of the migration of convective cells with the maximum size of hail stones, the rate of growth in the maximum size of hail stones in clo...

The statistical characteristics of the monthly mean values of the Tourism Climate Index (TCI) and its components for Mestia in the period from 1961 through 2010 are represented. In particular, the changeability of the indicated bioclimatic parameters into 1986÷2010 in comparison with 1961÷1985 is studied.

In the Kakheti region of Georgia in the work of anti-hail system anti-hail rockets "Loza-2" of the production of Bulgaria from September 2018 are used. Some results of the calculations of the optimum areas of cloud seeding by the crystallizing reagent for more than 80 points of action located on the protected territory in Kakheti are given. The cha...

There are represented the preliminary results of the radar analysis and ground-based monitoring of dust formation in the atmosphere above the territory of eastern Georgia on the 27th of July, 2018. Distance monitoring was accomplished with the aid of the meteorological radar «METEOR 735CDP10». The dust concentration was hourly measured (PM10 and PM...

The statistical characteristics of the monthly mean, annual and half year values of the Tourism Climate Index of tourism (TCI) and its components for four points of Kakheti (Telavi, Dedoplistskaro, Kvareli and Sagarejo) in the period from 1961 through 2010 are represented. In particular, the changeability of the indicated bioclimatic parameters int...

The statistical data about the meteorological parameters, associated with some simple thermal indices and Tourism Climate Index (TCI) (mean monthly and mean monthly maximum air temperature, mean monthly and mean monthly minimum air relative humidity, total monthly precipitation, sunshine duration, wind speed) in eight points of Adjara (Batumi, Kobu...

Представлены результаты статистического анализа среднемесячных данных о значениях эффективной температуры воздуха по Миссенарду (ЕТ) в двух диаметрально противоположно расположенных по широте географических районах Грузии: Автономной Республике Аджария (ниже – Аджария) и Кахетинском регионе (ниже – Кахетия). Период исследования – 1961-2010 гг. Знач...

მდინარე ვერეს ხეობაში 13.06.2015 წლის კატასტროფული წყალმოვარდნის გამომწვევი ტექნოგენური მიზეზი, რომელიც ამ მდინარის ბუნებრივი კალაპოტის ხელოვნური დახურული გვირაბებით ცვლილებაში მდგომარეობს, შეიძლება გარკვეულად მივიჩნიოთ. თუმცა, ამ მოვლენის წინმსწრები იყო ექსტრემალური ჰიდრომეტეოროლოგიური პირობები და ხეობის ურბანიზაცია, რამაც გამოიწვია მრავალრიცხოვან...

It is found that the relationship between the average monthly air temperature in Kutaisi and such indices of the health of population as the total number of emergency medical calls, cases of hospitalizations and deaths has the form of a third power polynomial. In general, in the warm months there is a decrease of the total number of emergency medic...

The data about the Tourism Climate Index (TCI) in Kutaisi (Imereti region of Western Georgia) useful for the development of the health resort- tourism potential of this locality are cited. The intra-annual distribution of the TCI values for Kutaisi has bimodal nature with the extremum during May and September (“Excellent”). In December, January and...

The comparative analysis of the connection of eight simple thermal indices and Tourism Climate Index (TCI) with the monthly mortality of the population of Tbilisi city apropos of cardiovascular diseases is represented. The values of simple thermal indices were calculated with the use of mean monthly and mean monthly for 13 hours data of meteorologi...

2017 ОЧЕРКИ ИСТОРИИ АКТИВНЫХ ВОЗДЕЙСТВИЙ НА МЕТЕОРОЛОГИЧЕСКИЕ ПРОЦЕССЫ В СССР И НА ПОСТСОВЕТСКОМ ПРОСТРАНСТВЕ 3 УДК 551.509.6 (091) ББК 26.233 О-95 Редакционная коллегия: Залиханов М.Ч. (председатель), академик РАН; Щукин Г.Г., доктор физико-математических наук; Дядюченко В.Н. , кандидат технических наук; Федченко Л.М., доктор географических наук;...

The work is dedicated to the memory of Boleslovas Styra, an outstanding Lithuanian scientist, founder of new direction of atmosphere physics-nuclear meteorology. His role in the formation, development and the modern evolution is noted of this direction of science in Georgia. in Vilnius, on the building of the Institute of Physics, Savanoriu pr. 231...

Results of investigation of monthly values of the Tourism Climate Index (TCI) in some localities of Georgia (21 localities) and North Caucasus (Russia, 6 localities) are represented. Height of these localities varied from 3 to 2194 m above sea level. Correlation and regression analysis of the connection of mortality by cardiovascular deceases in Tb...

Here is presented the data of statistical analysis of the monthly average values of the air temperature in the atmosphere above the territory of Kakheti at 19 levels in the range of heights from 0.54 to 27 km for the period from 2012 through 2016.

In this work, new data for the TCI for such well-known tourist and health resort places as Abastumani, Bakhmaro, Bakuriani, Gudauri, Sairme, Tskaltubo were obtained.

Some new data about the bioclimatic characteristics (Tourism Climate Index and light ions content in air) of the village Mukhuri (Western Georgia), useful for the development of the health resort-tourist potential of this locality are represented. It is shown that for the development of mass tourism the months from March through November are favora...

Приводятся сведения о физических концепциях по борьбе с градом, а также основанных на некоторых из них методах воздействия на градовые облака. Представлена информация о технике и технологии противоградовой защиты в бывшем Советском Союзе, и в частности в Грузии, где противоградовые работы проводились до конца восьмидесятых годов прошлого столетия н...

Приведены сравнительные сведения о применяемых в прошлом столетии для борьбы с градом в Кахетии ракеты «Алазани1/2» с используемой в 2015 году современной ракетой SK-6 производства Македонии. Представлена схема расположения более 80 ракетных пунктов воздействия на градовые облака и карты оптимальных площадей засева кристаллизующим реагентом объекто...

Results of the analysis of variations in sub-micron aerosols concentration with the diameter of ≥ 0.1 micron (LgN) and their connections with the radon content (Rn) in surface boundary layer of Tbilisi city (Georgia) are given. The data of daily mean values of the investigated parameters from 12.2009 to 11.2010 without taking into account the weath...

Приводится краткий обзор работ по радиолокационной индикации градоопасности конвективных облаков в годы работы Противоградовой службы в Грузии в прошлом столетии, а также проведено сравнение методологии этой индикации с современными способами идентификации градоопасных облаков в разных странах. Представлена краткая информация о современном метеорол...

In the Kakheti region of Georgia in the work of anti-hail system anti-hail rockets "Trayal D 6-B" of the production of Serbia from September 2016 are used. Some results of the calculations of the optimum areas of cloud seeding by the crystallizing reagent for 83 points of action located on the protected territory in Kakheti are given.

Large-scale experimental, experimental-production and production work on action on hail processes in Georgia was conducted in 1960-1989 (Kakheti, Southern Georgia) over the total area of approximately 1.2 million hectares. Positive effect changed in interval of 20-95% with average value of 75-85%. In those following quarter of century, after the cu...

Tourism climatology information was provided through climate indices such as those found in applied climatology and human biometeorology. There are more than 200 climate indices. In general, the tourism climate indices can be classified into three categories. Elementary indices are synthetic values that do not have any thermo-physiological relevanc...

In recent years the problem of observed and expected climate change on our planet acquired special urgency. This problem has high value in Georgia, because of the variety of climatic regions in its territory, and also, naturally, in Russia, with its extensive territory and variety of natural and climatic conditions. In our last studies with the use...

Results of the detailed statistical analysis of the monthly average decade mortality on the reasons for cardiovascular diseases in Tbilisi into 1980-1992 and 2012-2013 are represented. Variable +background and random component of time-series of mortality are determined. A share of the mean values of the component of variable +background from the me...

The data of ozone content in the atmosphere are required for studying the climate change, ecological appraisals, etc. Frequently, the information of ozone content in troposphere above the large regions or continents is necessary. At present there are several satellite systems in the world for operational global checking the atmospheric parameters i...

General information about natural disasters is outlined. Special attention is given to the description of geophysical type catastrophes (including in Georgia), possibilities of their artificial initiation for military purposes, measures for prevention and methods of reduction of their negative action on the living environment of peoples.

The aerosol optical depth (AOD) of the atmosphere is one of the important parameters, which is characteristic for general aerosol pollution of the atmosphere. The present work shows some results of modeling of AOD distribution over the territory of Georgia with different cloudiness according to the methodology of the combined analysis of satellite...

В Кахетии (Грузия) и на Северном Кавказе (Россия) в период с 1968 по 1988 гг. наблюдались эффекты уменьшения эффективности противоградовых работ, обусловленные ростом общего содержания аэрозольного загрязнения в атмосфере. В Кахетии этот эффект, главным образом, был связан с тенденциями увеличения загрязнения атмосферы, а на Северном Кавказе – со с...

Comparative analysis of the monthly values of Tourism Climate Index (TCI) in the South Caucasus countries capitals (Baku, Tbilisi, Yerevan) are presented. The statistical structure of TCI is studied. In the indicated cities between the TCI values are the high linear correlation, which reaches 1. The intra-annual distribution of the TCI values for a...

Проведен сравнительный анализ вековых вариаций температуры воздуха в Тбилиси, Санкт-Петербурге и ее среднеглобальных значений. В частности получено, что осреднение данных многолетних наблюдений различных метеорологических станций необходимо проводить с учетом анализа автокорреляции и периодичности в рядах каждой из них.