Légtömegtípusok objektív osztályozása Szegedre különös tekintettel a levegő szennyezettségére a téli hónapokban = An objective classification system of air mass types for Szeged, Hungary with special interest to air pollution levels in the winter months

Makra, László and Mika, János and Béczi, Rita and Sümeghy, Zoltán and Motika, Gábor and Szentpéteri, Mária: Légtömegtípusok objektív osztályozása Szegedre különös tekintettel a levegő szennyezettségére a téli hónapokban = An objective classification system of air mass types for Szeged, Hungary with special interest to air pollution levels in the winter months. Táj, környezet és társadalom : ünnepi tanulmányok Keveiné Bárány Ilona professzor asszony tiszteletére. pp. 457-465. (2006)

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Abstract

This paper determines the characteristic air mass types over the Carpathian Basin for the winter (December, January, and February) and summer (June, July and August) months with the levels of the main air pollutants. Based on the ECMWF data set, daily sea-level pressure fields analysed at 00 UTC were prepared for each air mass type (cluster) in order to relate sea-level pressure patterns with the levels of air pollutants in Szeged. The data basis comprises daily values of twelve meteorological and eight pollutant parameters for the period 1997-2001. Objective definition of the characteristic air mass types occurred by using the methods of Factor Analysis and Cluster Analysis. According to the results, during the winter months five air mass types (clusters) were detected corresponding to levels of the primary pollutants that appear with higher concentrations when irradiance is high and wind speed is low. This is the case when an anticyclone is found over the Carpathian Basin and when an anticyclone prevails over the region south of Hungary, influencing the weather of the country. Low levels of pollutants occur when zonal currents exert influence over Hungary. During the summer months anticyclones and anticyclone edge situations are found over the Carpathian Basin. (During the prevalence of anticyclone edge situations, the Carpathian Basin is found at the edge of a high pressure centre.) As a result of high irradiance and very low NO levels, secondary pollutants are highly enriched.

Item Type: Article
Journal or Publication Title: Táj, környezet és társadalom : ünnepi tanulmányok Keveiné Bárány Ilona professzor asszony tiszteletére
Date: 2006
Page Range: pp. 457-465
ISBN: 963 482 782 9
Uncontrolled Keywords: Levegőszennyeződés - környezetvédelem
Additional Information: Bibliogr.: 465. p. és a lábjegyzetben ; összefoglalás angol nyelven
Date Deposited: 2019. Nov. 20. 13:01
Last Modified: 2019. Nov. 20. 13:01
URI: http://acta.bibl.u-szeged.hu/id/eprint/62418

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