PubMed HealthSearch

PubMed · 2817532

Forecasting pollen pollution: correlation with floral development.

Abstract

Variations in the time course of flowering and in its intensity were recorded for regions in Israel along with variable climatic conditions. Such variations had an effect on pollen release into the air and on pollen counts. Two approaches for forecasting allergenic pollen dispersion were compared: (1) a survey of floral development and flowering intensity and (2) a survey of airborne pollen. There was a positive correlation between the survey of flowering and airborne pollen counts, although pollen was occasionally found after the flowering season. Further, it predicted fairly accurately the beginning of the flowering time of each species in each regio, the expected flowering duration, and intensity. Conducting a survey of flowering is a simple, easy and inexpensive operation. It is highly recommended for regions with variable climates.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

N Keynan, Y Waisel, A Shomer-Ilan, R Tamir. 1989. Forecasting pollen pollution: correlation with floral development.. https://pubmed.ncbi.nlm.nih.gov/2817532/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

An integrated multiscale air quality modelling framework for industrial park pollution: Linking local emissions to regional transport.

Capturing the spatiotemporal distribution of pollutants in industrial parks remains challenging for regional air quality models because of their coarse resolution (3 km), resulting in uncertainties in local emission quantification. To address this, we developed the Integrated Multiscale Air Quality Modelling System for Industry (IAQMS-Industry), coupling the regional Nested Air Quality Prediction Modelling System (NAQPMS) with a city-scale chemical transport model. This framework integrates point-source locations and Gaussian plume dispersion to simulate particulate matter with a diameter smaller than 2.5 micrometres (PM2.5) at 100 m resolution. Applied to the Beijing Yi Zhuang and Tangshan industrial parks and evaluated against observations. The coupled model achieved a normalized mean bias (NMB) ranging from 3.1 % to 6.2 %, improving upon NAQPMS (-16.9 % to -7.7 %). Spatial analysis revealed that coarse regional grids underestimated the PM2.5​ concentrations at industrial sites by smoothing gradients, whereas IAQMS-Industry successfully resolved spatial patterns. Industrial point emissions accounted for 22.9 %-26.4 % of PM2.5 in the coupled model, which was significantly greater than the regional model estimates of 1.6 %-13.7 %. These findings indicate that regional models overestimate pollutant dispersion processes in industrial parks while underestimating local industrial impacts. By explicitly resolving point-source dynamics and linking them to regional transport, IAQMS-Industry provides a robust tool for designing targeted emission controls in industrial cities and balancing local air quality improvements with minimized regional pollution outflow. This study underscores the necessity of multiscale modelling for accurate source apportionment and informed environmental governance in industrial zones.

Air Pollution

[Urban atmospheric pollution and public health: epidemiologic data].

Air pollution which is generated by car traffic of by various industries is susceptible to alter several functions of the respiratory cells. This has been demonstrated in several studies in vivo, in animal models or in human volunteers. However, the results of epidemiological studies in which the impact of air pollution on human health and particularly on the respiratory system (e.g asthma or respiratory infections), are unclear. Short term epidemiological studies have shown that air pollution can be responsible for some asthma symptoms such as cough and shortness of breath in known asthmatics, particularly in patients with mild rather than severe asthma. Moreover, these studies do not demonstrate than air pollution is responsible for the increase prevalence of asthma which has been reported these last 20 years. Concerning the relationships between air pollution and respiratory infections, the epidemiological studies are also contradictory.

Air Pollution

[Susceptible populations and urban atmospheric pollution. Development of a policy of protection].

The short term vulnerability of sections of the population to the harmful effects of chemical pollutants in the urban atmosphere represents an important unresolved problem of public health. These groups include young children, the elderly, asthmatic patients, and patients with chronic bronchitis and cardio-respiratory insufficiency. A recently ratified French law on air and rational energy use is aimed at resolving this problem in the context of recognizing that everybody has a right to breathe air which is not damaging to their health. In order to achieve this objective and direct the measures to be taken to reduce the emission of pollutants relating to industrial activity, to heating and to road traffic, the law provides for an extension to the chain of automatic registering stations which enable the recording of atmospheric data in large urban centers. It also defines the limits of substances allowed in the air over given periods and revises the critical levels of particulate and gaseous pollutants allowed according to current experimental and epidemiological data. Thresholds for information and for alerting the population will also be defined, with eventually restrictive measures for industry and for car traffic envisaged. These provisions are a major step for the protection of susceptible populations and should be enhanced in the near future by extension to cover other potentially noxious substances. This requires continued study on the short and long term effects of atmospheric pollution on people's health.

Air Pollution