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Analysis of aerial pollen and allergic rhinitis in Ordos region |
HAO Yu-zhu, GUO Chun-yan, WANG Jia |
Inner Mongolia Meteorological Service Center, Hohhot, Inner Mongolia 010051, China |
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Abstract The pollen concentration, the number of AR patient visits, and meteorological data from April 1, 2017 to September 30, 2022 in Ordos were selected for statistical analysis in this study. There were two peak periods of pollen concentration in Ordos City, namely from April 1st to April 30th and from July 20th to September 10th, and among them, the impact of summer and autumn pollen was more severe, and AR patients mainly occurred in August. From 2017 to 2022, the annual average pollen concentration showed a decreasing trend year by year, and the number of days pollen concentration exceeded the standard decreasing from 76 to 38 days, while the number of AR patient visits did not decrease every year. Through research on the effects of pollen, the number of AR patient visits, and meteorological factors, the following results were presented. The Vegetation coverage was positively correlated with pollen concentration, and the pollen contribution rate of the vegetation index was 38.3%, the higher the relative humidity,the shorter sunshine hours, the lower wind speed, the better the vegetation growth, and the higher the pollen concentration, and the influence of meteorological factors contributed 46.3% to the variation of pollen concentration, vegetation and meteorological conditions are the main factors leading to changes in pollen concentration. However, the outbreak of pollen concentration is related to the accumulation of accumulated temperature, surface accumulated temperature and sunshine hours, and the accumulated temperature, surface accumulated temperature and sunshine hours should need to reach the conditions of 1958℃, 2296℃ and 757h respectively. When the pollen concentration sensitization threshold reached 80grains/1,000mm2, the AR patients showed a doubling after 2days. Based on the response relationship between pollen concentration and AR patients, a model of pollen concentration change was constructed to estimate the number of patients, which could provide important basis for the prevention of local medical treatment and environmental departments in advance. Key word:number of visits for allergic rhinitis;peak pollen concentration period;number of days when pollen exceeds the limit;correlation research
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Received: 04 October 2023
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