https://openlibrary.ge/handle/123456789/638 2026-04-14T11:11:49Z https://openlibrary.ge/handle/123456789/10120 Title: ქარბორბალას დამანგრეველი ძალის შეფასება ფოთის ტერმინალის ტერიტორიაზე 2021 წლის 25 სექტემბრის; Assessment of the Destructive Power of a Tornado on the Territory of the Poti Terminal on September 25 Authors: ჩიხლაძე, ვ.; ამირანაშვილი, ა.; გელოვანი, გ.; თავიდაშილი, ხ.; ლაღიძე, ლ.; ჯამრიშვილი, ნ.; Chikhladze, V.; Amiranashvili, A.; Gelovani, G.; Tavidashvili, Kh.; Laghidze, L.; Jamrishvili, N. Abstract: საქართველო გამოირჩევა რთული ფიზიკურ-გეოგრაფიული და კლიმატური პირობებით, რის შედეგადაც ზოგიერთ რეგიონში ადგილი აქვს რიგი მეტეოროლოგიური ელემენტების მნიშვნელოვან და მკვეთრ ცვალებადობას. ამ მხრივ განსაკუთრებით მნიშვნელოვანია ქარის მახასიათებელი ექსტრემალური სიდიდეების შეფასება იმ თვალსაზრისით, რომ ამგვარ მოვლენებს შეუძლია მნიშვნელოვანი ზიანი მიაყენოს ქვეყნის სამეურნეო-ეკონომიკურ ინფრასტრუქტურას მათი დამანგრეველი მოქმედების შედეგად. კვლევაში, როგორც კერძო შემთხვევა, განხილულია ქარბორბალა, რომელსაც ადგილი ჰქონდა 2021 წლის 25 სექტემბერს ქალაქ ფოთის სატვირთო სატერმინალო სივრცეში, რომელმაც მნიშვნელოვანი ზიანი მიაყენა ერთ-ერთ სატვირთო ტერმინალს. აღნიშნული ზიანის შესაფასებლად, გამოყენებულ იქნა ტერმინალის ტერიტორიაზე დამონტაჟებული სათვალთვალო ვიდეოკამერების მიერ ავტომატურ რეჟიმში დაფიქსირებული მონაცემები, რომელთა საფუძველზეც მოვახდინეთ აღნიშნული სტიქიური პროცესის (გრიგალის) სიჩქარის შეფასება. გრიგალში საგნების გადაადგილების სიჩქარეების დასადგენად გამოყენებულ იქნა სპეციალური პროგრამა „Mivavi Video Editor Plus“. აღნიშნული ვიდეომასალის შემდგომი დამუშავების შედეგად დადგინდა, რომ (დროის ერთ-ერთ პერიოდში) ქარბორბალას ეპიცენტრში ქარის სიჩქარემ 190-274.6 კმ/სთ სიჩქარეს მიაღწია. ეგრეთწოდებულ „ფუძიტას სკალის“ მიხედვით ქარბორბალას (ტორნადოს) ძალა განისაზღვრება ქარის სიჩქარით და თანმხლები შედეგების მიხედვით, რომელიც აღნიშნულ მოვლენას თან ახლავს. შესაბამისად დადგენილ იქნა, რომ ქარბორბალას სიძლიერე განხილული ტერმინალის ტერიტორიაზე ე.წ. „ფუძიტას სკალით“ F2-ს შეესაბამება, რაც განპირობებულია ადგილობრივი ტერიტორიის სპეციფიკით და დროის განსახილველ პერიოდში დაფიქსირებული სინოპტიკური პროცესებით.; Georgia is distinguished by complex physical, geographical and natural conditions, as a result of which significant and abrupt changes in a number of meteorological elements take place in some regions. The assessment of extreme values of wind characteristics is especially important, since such phenomena can cause significant damage to the economic infrastructure of the country as a result of their destructive activity. The study, as a special case, considered a tornado that took place on September 25, 2021 in the terminal space of the city of Poti, which caused significant damage to one of the cargo terminals. To assess the specified damage, photographic materials were used, filmed in automatic mode by video cameras of the surveillance system located on the territory of the terminal. With the help of these data, it was possible to estimate the speed of the vortex flows of the above spontaneous process (tornado). To determine the speed of movement of objects inside the tornado, the deceleration program "Mivavi Video Editor Plus" was used. As a result of subsequent processing of the received video image, it was found that at one of the points in time, the speed of objects inside the tornado was 190 - 265 km/h. According to the so-called Fujita scale, the strength of a tornado is determined by the wind speed inside the tornado and related phenomena (degree of destruction). As a result, it was found that the strength of the tornado in the considered territory of the terminal corresponds to the F2 value of the Fujita scale, which was due to the specifics of the location of the territory and the synoptic processes recorded in the considered period of time. 2022-01-01T00:00:00Z https://openlibrary.ge/handle/123456789/10119 Title: Statistical Analysis of Angstrom Fire Index for Kutaisi, Georgia Authors: Bliadze, T.; Amiranashvili, A.; Chkhitunidze, M.; Laghidze, L. Abstract: The problem of fires, including forest fires, is actual for many countries of world. This problem is also important for Georgia, where forest fires are frequent. In recent years this problem is aggravated by the global and local climate warming which facilitates an increase in the fire hazard. In Georgia, the top 3 regions were responsible for 53% of all tree cover loss between 2001 and 2020. Samtskhe-Javakheti had the most tree cover loss at 3.24 kha, then Kakheti (1.24 kha) and Imereti (1.01 kha) [https://www.globalforestwatch.org/dashboards/country/GEO]. For evaluating the fire hazard in locality the set of indices is developed. One of the simple of these indices is the Swedish Angstrom Fire Index (AFI). Earlier, data on AFI for Tbilisi and Telavi were presented. In this work results of a statistical analysis of daily values of AFI for Kutaisi are presented. AFI = (R/20) + (27-T)/10, where R is the minimum relative humidity, T is the maximum air temperature. Data of the about daily values of T and R in the period 2011-2020 are used [http://www.pogodaiklimat.ru/archive.php?id=ru®ion=07]. The gradations of the values of AFI are as follows: I. AFI ≥ 4.1 – Low, II. AFI = 4.0 ÷ 3.0 - Moderate, III. AFI = 2.9 ÷ 2.5 - High, IY. AFI = 2.4 ÷ 2.0 – Very High, Y. AFI = <2.0 - Extreme. In particular, it was found that an Extreme fire hazard in Kutaisi is observed on average within 59 days a year (16.0 % of cases), Very High – 46 days a year (12.7 % of cases), High - 64 days a year (17.6 % of cases), Moderate – 100 days a year (27.5 % of cases), Low – 96 days a year (26.2 % of cases). The highest repeatability of AFI values for its various gradations is as follows: Extreme – 33.3 % (September), Very High – 22.6 % (August), High – 30.3 % (July), Moderate – 37.3 % (November), Low 48.7 % (January). The values of AFI in Kutaisi are compared with their values in Tbilisi and Telavi. In particular, it was found that a repeatability of Extreme fire hazard in Kutaisi is lower, than in Tbilisi (19.1 % of cases) and Telavi (18.5 % of cases). This result is in good agreement with the data on loss of forest cover from fires in Kakheti and Imereti, indicated above. Further, it is planned to expand work on this issue (using other more complex fire hazard indices, studying their trends in connection with climate change, determining these indices for other points in Georgia, etc.). 2022-01-01T00:00:00Z https://openlibrary.ge/handle/123456789/10118 Title: Variability of the Average Annual Air Temperature in Tbilisi Against the Background of Global Warming in 1880-2021 Authors: Amiranashvili, A. Abstract: Some results of a study of the variability of the average annual air temperature in Tbilisi against the background of global warming in 1880-2021 are presented. For the analysis, data of the National Environment Agency of Georgia (http://www.pogodaiklimat.ru/) and the NASA Goddard Institute for Space Studies (https://data.giss.nasa.gov/gistemp/) are used. A comparison of data on the variability of the anomalies of the average annual air temperature in Tbilisi in relation to the average temperature in 1951-1980 (T:TB) with similar anomalies of the global air temperature over land and ocean (T:GL), air temperature in the northern hemisphere (T:NH), and zonal air temperature in the northern hemisphere in different latitude ranges (T:24°N-44°N, T:24°N-64°N, T:44°N-64°N and T:64°N-90°N) are conducted. In particular, the following results are obtained. Mean value of T:TB in 1880-2021 is 0.05°C and best match to mean value of T:GL (0.06°C). Max value of T:TB is 2.26 °C and best match to max value of T:44°N-64°N (1.82 °C). Min value of T:TB is -1.70 °C and best match to min value of T:64°N-90°N (-1.76 °C). Coefficient of linear correlation of T:TB with others investigation parameters change from 0.51 (with T:64°N-90°N) to 0.67 (with T:24°N-44°N). Difference between mean values T:TB in 1992÷2021 and 1880÷1909 is 1.2 °C and exactly coincides with the analogous difference for T:24°N-64°N. The trends of all studied parameters are satisfactorily described by a fourth power polynomial. For Tbilisi, a linear approximation is also acceptable. 2022-01-01T00:00:00Z https://openlibrary.ge/handle/123456789/10117 Title: Variability of the Average Annual Air Temperature in Tbilisi Against the Background of Global Warming in 1880-2021 Authors: Amiranashvili, A. Abstract: Some results of a study of the variability of the average annual air temperature in Tbilisi against the background of global warming in 1880-2021 are presented. For the analysis, data of the National Environment Agency of Georgia (http://www.pogodaiklimat.ru/) and the NASA Goddard Institute for Space Studies (https://data.giss.nasa.gov/gistemp/) are used. A comparison of data on the variability of the anomalies of the average annual air temperature in Tbilisi in relation to the average temperature in 1951-1980 (T:TB) with similar anomalies of the global air temperature over land and ocean (T:GL), air temperature in the northern hemisphere (T:NH), and zonal air temperature in the northern hemisphere in different latitude ranges (T:24°N-44°N, T:24°N-64°N, T:44°N-64°N and T:64°N-90°N) are conducted. In particular, the following results are obtained. Mean value of T:TB in 1880-2021 is 0.05°C and best match to mean value of T:GL (0.06°C). Max value of T:TB is 2.26 °C and best match to max value of T:44°N-64°N (1.82 °C). Min value of T:TB is -1.70 °C and best match to min value of T:64°N-90°N (-1.76 °C). Coefficient of linear correlation of T:TB with others investigation parameters change from 0.51 (with T:64°N-90°N) to 0.67 (with T:24°N-44°N). Difference between mean values T:TB in 1992÷2021 and 1880÷1909 is 1.2 °C and exactly coincides with the analogous difference for T:24°N-64°N. The trends of all studied parameters are satisfactorily described by a fourth power polynomial. For Tbilisi, a linear approximation is also acceptable. 2022-01-01T00:00:00Z