The diurnal variation of air-borne ragweed pollen as determined by a continuous recording particle sampler and implications of the study

Smith, Ronald Delaine; Rooks, Roland

doi:10.1016/0021-8707(54)90047-7

Cited by 20 publications

(3 citation statements)

References 12 publications

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“…REsuLTS-Ambrosia-Although Ambrosia pollen has been widely sampled by allergists and public health agencies for many years because of its allergenic properties, locations near local sources are normally avoided and samples are commonly taken over 24-hr periods. Several investigators (Smith and Rooks , 1954, for instance) have studied diurnal variations in pollen count at sampling stations not located at a specific source. Since the origin of the pollen collected and the time of transport from plants to sampler are unknown, such data are inadequate to describe daily emission patterns.…”

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Diurnal Patterns of Pollen Emission in Ambrosia, Phleum, Zea, and Ricinus

Ogden

Hayes

Raynor

1969

American J of Botany

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Hourly measurements of pollen emission were made from cultivated plots of Ambrosia, Phleum, Zea, and Ricinus over the course of several pollination seasons as part of a study of pollen dispersion from known sources. A characteristic diurnal emission pattern was found for each genus. Ambrosia pollen emission normally begins an hour or two after sunrise, peaks a few hours later, and decreases through the afternoon. Phleum starts during the night, peaks about 2 hr after sunrise, and declines slowly through the day. Zea emits pollen fairly uniformly during the period from 2 hr after sunrise to about sunset, while Ricinus pollen was collected from several hours after sunrise to late afternoon with a peak in mid‐morning. Daily patterns often vary from the seasonal mean in response to changing meteorological conditions.

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Diurnal Patterns of Pollen Emission in Ambrosia, Phleum, Zea, and Ricinus

Ogden

Hayes

Raynor

1969

American J of Botany

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“…Several investigators (Smith and Rooks, 1954, for instance) have studied diurnal variations in pollen count at sampling stations not located at a specific source. Several investigators (Smith and Rooks, 1954, for instance) have studied diurnal variations in pollen count at sampling stations not located at a specific source.…”

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confidence: 99%

Diurnal Patterns of Pollen Emission in Ambrosia, Phleum, Zea, and Ricinus

Ogden¹,

Hayes²

1969

American Journal of Botany

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. A B S T R A C THourly measu rements of pollen emission were made from cultivated plots of Ambrosia, Phleum, Zea, and Ricinus over the course of several pollination seasons as part of a study of pollen dispersion from known sources. A characteristic diurnal emission pattern was found for each genus. Ambrosia pollen emission normally begins an hour or two after sunrise, peaks a few hours later, and decreases through the afternoon. Phleum starts during the night, peaks about 2 hr after sunrise, and declines slowly through the day. Zea emits pollen fairly uniformly during the period from 2 hr after sunrise to about sunset, while Ricinus pollen was collected from several hours after sunrise to late afternoon with a peak in mid-morning. Daily patterns often vary from the seasonal mean in response to changing meteorological conditions. Janiuary, 1969] OGDEN ET AL.-PATTERNS OF POLLEN EMISSION

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“…Most of the studies on the relationship between hay fever symptoms and exposure to allergenic pollen have made use of the Durham gravity slide, the Hirst volumetric pollen trap, or a similar instrument to obtain pollen counts over 24 h periods, but observations of the flowering characteristics, the time of shedding of the pollen, and the airborne-pollen levels have shown that most plants release their pollen within limited periods (hours) rather than throughout the day (18,19,24,28,35).…”

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Daily Hay Fever Forecast in The Netherlands

Spieksma

1980

Allergy

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The literature on local pollen counts and their significance for hay fever is reviewed and a system for forecasting hay fever is described. Such forecasts have been broadcast by radio in The Netherlands since 1977. The hay fever forecast takes the form of a prognosis (in terms of three grades) of the influence of the expected whether situation on tomorrow's course of the subjective complaints of hay fever sufferers. It is not a forecast of the pollen count. When the subjective complaints of about 150 hay fever patients were used as reference for evaluation, the forecasts proved to have been correct in 72, 85, and 88% of the cases in 1977, 1978, and 1979, respectively. The practical usefulness and the limitations of the system are briefly discussed, with emphasis on the principle that not the local pollen count but the weather should be taken as the main determinative factor for the expected subjective experiences in a group of hay fever sufferers in a certain region.

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The diurnal variation of air-borne ragweed pollen as determined by a continuous recording particle sampler and implications of the study

Cited by 20 publications

References 12 publications

Diurnal Patterns of Pollen Emission in Ambrosia, Phleum, Zea, and Ricinus

Diurnal Patterns of Pollen Emission in Ambrosia, Phleum, Zea, and Ricinus

Diurnal Patterns of Pollen Emission in Ambrosia, Phleum, Zea, and Ricinus

Daily Hay Fever Forecast in The Netherlands

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