Airborne olive pollen in Vigo (Northwest Spain): a survey to forecast the onset and daily concentrations of the pollen season

Influence of meteorological parameters onOleaflowering date and airborne pollen concentration in four regions of Portugal

“…In our study, the predictive models considered as the best independent variables both cumulative values and average temperature values of the months prior to flowering and cumulative precipitation values observed during the autumn-winter season. The occurrence of preseason high rainfall levels has been reported as having a major positive effect on Olea annual pollen production and MPS onset dates (Fornaciari et al 1997;González-Minero et al 1997;Rodríguez-Rajo et al 2004). A strong relationship between the total Olea APC and the rainfall registered in the three previous months was also observed in Spain (Recio et al 1996).…”

“…Many authors have used the accumulative temperature values to predict the onset of the MPS (Galán et al 2001;Moriondo et al 2001;Vázquez et al 2003;Rodríguez-Rajo et al 2004). In our study, the predictive models considered as the best independent variables both cumulative values and average temperature values of the months prior to flowering and cumulative precipitation values observed during the autumn-winter season.…”

“…In addition, some inter-annual variations among and within regions of the total annual pollen counts and the initial, peak and ending dates of the MPS were observed. The relationship between Olea MPS features (initial, peak and total concentration) and the meteorological conditions observed prior and during this season have been widely studied (Galán et al 2001;Moriondo et al 2001;Hidalgo et al 2002;Rodríguez-Rajo et al 2004). Nevertheless, these kinds of studies are nonexistent in Portugal and often the predictive models developed for other countries can give poor results when they are applied to other regions than the ones for which they were computed.…”

An objective classification system of air mass types for Szeged, Hungary, with special attention to plant pollen levels

“…Hence, irradiance is high, which involves an increase in the temperature parameters, and wind speed reaches the maximum of all clusters. This type comprises the second highest mean daily pollen levels, which is in accordance with the high temperature parameters (Gioulekas et al 2004;Stennett and Beggs 2004;Makra et al 2004b andRodríguez-Rajo et al 2004a) and high irradiance (Gioulekas et al 2004;Rodríguez-Rajo et al 2004b (Fig. 4a; Table 3; Fig.…”

“…Pollen concentrations of the species examined showed significant positive correlations with temperature parameters [mean air temperature (Gioulekas et al 2004;Stennett and Beggs 2004), minimum air temperature (Makra et al 2004b;Rodríguez-Rajo et al 2004a), maximum air temperature (Rodríguez-Rajo et al 2004a), dew point temperature (Stennett and Beggs 2004)], and with duration of sunshine (Gioulekas et al 2004), and significant negative correlations with atmospheric pressure (Stennett and Beggs 2004). However, the relationship of pollen levels to other meteorological parameters is less clear.…”