Airborne grass pollen in Leiden, The Netherlands: annual variations and trends in quantities and season starts over 26 years

Spieksma, Floske M.; Nikkels, A. H.

doi:10.1007/bf02694304

Cited by 43 publications

(28 citation statements)

References 20 publications

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“…Since allergy sufferers react to most grass pollen, and the different taxa are not distinguished in the traditional pollen analysis, it is necessary to fi nd generalized parameters for pollen, if prediction models are to be developed. In spite of the apparent importance of long-day conditions for in fl orescence development even to begin, a number of authors have successfully used temperatures even from the pre-equinox part of late winter and early spring ( Frenguelli et al 1989 ;Spieksma and Nikkels 1998 ;Emberlin et al 1993 ;Smith and Emberlin 2005 , Table 3.1 ). In addition, a correlation between the amount of precipitation and onset of anthesis is found in a number of studies, alone or interacting with temperature; i.e., the more rain, the earlier is the start of fl owering (Jones 1995 ;Ong et al 1997 ;Stach et al 2008 ) .…”

Section: Readiness To Flower In Grasses and Other Herbaceous Plantsmentioning

confidence: 97%

“…The long-term (26 year) dataset of daily airborne grass pollen concentrations in Leiden was analysed (Spieksma and Nikkels 1998 ) in order to identify trends and variations. Analysis showed that individual years had their own characteristic periods of high and low grass pollen concentrations, very often with multiple peaks.…”

Section: Flowering Intensity In Grasses and Other Herbaceous Speciesmentioning

confidence: 99%

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The Onset, Course and Intensity of the Pollen Season

et al. 2012

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The onset, duration and intensity of the period when pollen is present in the air varies from year to year. Amongst other things, there is an effect upon the quality of life of allergy sufferers. The production and emission of pollens are governed by interacting environmental factors. Any change in these factors may affect the phenology and intensity of the season. Readiness to fl ower in a plant, and the amount of pollen produced, is the result of conditions during an often long period foregoing fl owering. When a plant is ready to fl ower, temporary ambient circumstances e.g., irradiation and humidity, determine the timing of the actual

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Section: Readiness To Flower In Grasses and Other Herbaceous Plantsmentioning

confidence: 97%

Section: Flowering Intensity In Grasses and Other Herbaceous Speciesmentioning

confidence: 99%

The Onset, Course and Intensity of the Pollen Season

et al. 2012

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“…1 The start and duration of flowering determine the potential hay fever period whereby the start and duration of the pollen season vary from year to year. Spieksma and Nikkels (1998), for example, studied the pollen season for grasses over the period 1969 to 1994 and found a difference in start date ranging from 12 May to 19 June.…”

Section: Introductionmentioning

confidence: 99%

The influence of temperature and climate change on the timing of pollen release in the Netherlands

Vliet

Overeem

Groot

et al. 2002

Intl Journal of Climatology

134

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In the last decade it has become clear that the timing of many phenological processes, like the start of flowering and leaf unfolding in spring, have changed. The increase in temperature is believed to be the main cause. The earlier start of flowering will have consequences for the start of the pollen season, and thus for the start of the hay fever season. Millions of people world-wide will therefore experience the impact of climate change in their daily lives during spring and summer. In this paper we analyse the relation between climate parameters, especially temperature, and the start of the pollen season in the western part of the Netherlands based on daily pollen counts of the Leiden University Medical Centre and temperature measurements from 1969 till 2000 by the Royal Netherlands Meteorological Institute in De Bilt. The results indicate that there is a strong correlation between temperature and start of the pollen season. An advance of the start of the pollen season of 3 to 22 days has been observed. The potential future changes in the start of the pollen season under climate change scenarios are also discussed.

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“…In the longterm observations conducted in Denmark, the Netherlands, Belgium and Great Britain, no distinct trends have been established [42].…”

Section: Discussionmentioning

confidence: 96%

“…Relative humidity and rainfall [35][36][37][38][39][40] had a negative effect. Many studies indicate some meteorological elements related to the start of Poaceae seasons: mean temperature in March-April (in the Netherlands), mean temperature before the season start (in Poland), total rainfall in July (in Australia), rainfall in June (in the Iberian Peninsula), cumulative temperature above 5.5°C in March-April, minimum temperature in the first decade of April and maximum temperature in the second decade of April (in the United Kingdom) [41][42][43][44][45][46]. Daily maximum temperature (optimum 21-25°C), daily mean temperature and anticyclonic synoptic situation on the day before the forecasted day have been reported as the main variables influencing the daily Poaceae pollen concentration [8,29,39,47,48].…”

Section: Discussionmentioning

confidence: 99%

Relation between Poaceae pollen concentrations and meteorological factors during 2000–2010 in Timisoara, Romania

Ianovici

2015

Acta Agrobot

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This paper presents the results of Poaceae pollen seasons from 2000-2010 in Timisoara, Romania. Airborne Poaceae pollen concentrations was high. An increasing trend in the annual totals was observed. The longest pollen season was recorded in the year 2000. The period in which the Poaceae pollen count exceeded the threshold value of 30 grains/m 3 lasted from 9 to 46 days. The present study analyzed the dynamics of pollen seasons in relation to meteorological factors. On the basis of Spearman's correlation test, the strongest positive correlation was found between the Poaceae pollen counts and temperature; and sunshine hours. Daily average relative humidity, atmospheric pressure and precipitation had a negative effect. A multiple regression analysis was applied to determine how much of the total variance in Poaceae pollen counts can be explained by meteorological parameters. The coefficient of determination ranged from 0.245 to 0.460. Our data illustrate the contrasting effects of temperature, wind, relative humidity and rainfall on the concentration of pollen in the air. The optimum conditions for Poaceae pollen release occur during late spring and early summer. The Poaceae pollen remains one of the major aeroallergens in Timisoara area.

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Airborne grass pollen in Leiden, The Netherlands: annual variations and trends in quantities and season starts over 26 years

Cited by 43 publications

References 20 publications

The Onset, Course and Intensity of the Pollen Season

The Onset, Course and Intensity of the Pollen Season

The influence of temperature and climate change on the timing of pollen release in the Netherlands

Relation between Poaceae pollen concentrations and meteorological factors during 2000–2010 in Timisoara, Romania

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