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Birch (Betula L.) pollen seasons in Cracow in 1991-2008 in relation to meteorological conditions

100%

Myszkowska D., Piotrowicz K.

Acta Agrobotanica

2009

tom 62

nr 2

The parameters of the birch pollen seasons in Cracow in 1991-2008 were analysed in relation to some meteorological elements and synoptic situations (circulation types, air masses and atmospheric fronts). Two types of the pollen seasons were distinguished – highly dense and less dense. The first type of the season started on the 15th of April (on average), lasted 11-20 days and the maximum daily concentration exceeded 500 pgm-3. The less dense type started generally earlier (the first decade of April), lasted more than 20 days and the peak days were unstable. In this type of the pollen season, two peak days were often observed. The relationship between the type of the season and the meteorological conditions before the season was pointed out. Additionally, the influence of circulation types, types of air masses and atmospheric fronts over south-eastern Poland on a given day on the number of days with a daily concentration > 80 pgm-3 was analysed. The relationship between the pollen season type and meteorological conditions before the season was found, among others, the influence of types of synoptic situations and air masses on the number of days with a concentration of over 80 pgm-3 was established.

The grass pollen season dynamics in relation to the meteorological conditions in Cracow, southern Poland, 1991-2008

84%

Myszkowska D.

Acta Agrobotanica

2010

tom 63

nr 2

The aim of the study was to analyse the grass pollen season dynamics in Cracow in 1991-2008 and to find the relationship between the meteorological conditions and season parameters. The pollen season started on average on the 138th day of the year (±10 days) and ended on the 211th day (±10 days). The median of the SPI value (calculated by the 95/90% method) was 2041, peak concentration – 111 pgm-3 (achieved on average on the 34th day of the season/173th day of the year). The average temperature in April-May showed the greatest effect on the start and end of the season (negative correlation). Tmean of the third decade of June influenced the season end (rs negative). Tmean of April-May correlated negatively with the time of peak concentration. Rainfall in January and April influenced the season start. Relative sunshine in March-April was related to the season start, in the third decade of June it was related to the season end (negative correlation), in March-April it influenced the time of peak concentration (positive correlation), while in January-March the peak concentration (positively). Cloudiness in February-May and also in the third decade of June had an impact on the season end and time of peak concentration (positive correlation). Humidity in February influenced the season start (negatively). The SPI value was influenced by relative sunshine (positively) in February-May, by humidity in April, and cloudiness in February-March (negatively).

Ograniczanie wyników

2 Acta Agrobotanica

2 Myszkowska D.

1 Piotrowicz K.

1 2010

1 2009

Wyniki wyszukiwania

Birch (Betula L.) pollen seasons in Cracow in 1991-2008 in relation to meteorological conditions

The grass pollen season dynamics in relation to the meteorological conditions in Cracow, southern Poland, 1991-2008