Daily variations of airborne pollen in Beijing Olympic Park during August of three consecutive years and their relationships with meteorological factors |
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| Authors: | Jing-xian Xu De-shan Zhang |
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| Institution: | 1. Beijing Museum of Natural History, Beijing 100050, P. R. China
2. Beijing Specialized Meteorological Observatory, Beijing 100089, P. R. China |
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| Abstract: | A three-year aeropalynological study was carried out in the month of August for each of the three years 2005, 2006 and 2007 in the Beijing Olympic Park. A total of 19550 pollen grains were counted (15057 grains in 2005, 2717 in 2006 and 1776 in 2007) for the following taxa: Gramineae, Chenopodiaceae, Humulus L., Artemisia L., Ambrosia L. and Pinus L. The analysis indicat-ed that in the three consecutive years of 2005-2007, airborne pollen types and daily number of pollen in August in the Beijing Olym-pic Park were closely related to environmental change and vegetation composition. The daily variations of airborne pollen displayed similar patterns in August in each of the three years, which were affected positively by periods of daily sunshine, negatively by daily relative humidity and daily precipitation. Continuously high daily temperatures and stable daily wind speeds seemed to have little ef-fect on the fluctuation of airborne pollen. |
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| Keywords: | daily variations aeropalynology airborne pollen Beijing Olympic Park |
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