Friday 29 March 2024
LÉGKÖR - Quarterly Newsletter

Vol. 67, No. 3 * Pages 122–180 * September 2022


Newsletter of the Hungarian Meteorological Service 
and the Hungarian Meteorological Society (in Hungarian)

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Trend analysis: national temperature trend of hourly values
Barna Zsófia, Izsák Beatrix, Pieczka Ildikó
DOI:10.56474/legkor.2022.3.1 (pp. 122–129)
 PDF (3733 KB)   |   Abstract

Climate research plays a significant role in meteorological researches. In this paper we present the trend analysis of the daily average temperature data series and the available hourly values (0 UTC, 6 UTC, 12 UTC, 18 UTC) on an annual and seasonal basis. According to our results the highest trend values are related to the 12-hour database the spatial distribution of which is most similar to the 18-hour database mainly in summer and autumn. Besides the lowest values were obtained in the case of the 0 hour database.


Analysis of hot spells in Hungary from the early 20th century to the present
Bokros Kinga, Lakatos Mónika
DOI:10.56474/legkor.2022.3.2 (pp. 130–140)
 PDF (5409 KB)   |   Abstract

Climate change causes increasing frequency of extremes associated with high temperatures, and the increasing persistence and intensity of heat waves in our region. Various extreme climate indices are recommended and commonly used to detect the impact of climate change. Some of these indices have been implemented and calculated, such as hot days, warm days and tropical nights. For the analyses, we used homogenized, interpolated daily measurements from the period 1901–2021. A linear trend model was used to estimate the changes, and its significance was also tested. Heat wave days were derived using several definitions of heat wave. Comparative analyses of heatwave periods were carried out based on the OMSZ warnings, the National Public Health Centre’s heat alert system and the indicators available for Hungary in the Copernicus programme’s European Health Service.


Volcanic eruption - air quality - climate
Kövesi-Lázár Krisztina
DOI:10.56474/legkor.2022.3.3 (pp. 141–150)
 PDF (8665 KB)   |   Abstract

Nowadays, a number of studies support the impact of volcanic activity on the climate. The volcanic material released into the atmosphere during the eruption is rich in sulphur, which reacts with water to form a sulphate aerosol. The volcanic material enters the stratosphere as a result of a more intense eruption, where it easily spreads over a large area with the winds and can last for years. The stratospheric presence of a sulphate aerosol cloud has many dangerous and far-reaching consequences, including a decrease in surface temperature, an increase in stratospheric temperature, and a decrease in ozone concentration. As there are realistic statistical chances of future eruptions, it is important to be aware of the effects of volcanic activity and to learn from the consequences of past events. The article presents some significant eruptions from both the recent and distant past and their effects on climate and society.


Precipitation station in Mernye
Ötvös Tamás
DOI:10.56474/legkor.2022.3.4 (pp. 151–156)
 PDF (2434 KB)   |   Abstract

In addition to the automatic weather stations, there are still hundreds of traditional precipitation stations – whose observers send their measurements and observations online to the Service’s central database on a daily basis – in the monitoring network of Hungarian Meteorological Service. One of these rain gauge stations has been operating in Mernye for several decades. Mernye is located along the R 67 expressway, 17 km north of Kaposvár and 33 km from the southern shore of Lake Balaton. In my article, I would like to give a brief historical overview of the precipitation station in Mernye, with some interesting weather events and measurement data.


Operation of national electricity grid
Kovács Gergely
DOI:10.56474/legkor.2022.3.5 (pp. 157–161)
 PDF (2556 KB)   |   Abstract

Access to electricity is as evident for people today as access to air for breathing. When we turn on the vacuum
cleaner, wash the clothes or we are intend to cut the grass, our movement is automatic. We insert the plug into the socket. But what is behind the socket? How does the current get there and what is the role of the system operator in this process?


LÉGKÖR - Quarterly Newsletter