title: [A relationship between birch pollen counts and meteorological factors in Sapporo].
abstract: Occurrence of airborne pollen in Sapporo has been studied for 19 years during the period between 1995 and 2013. There are wide year-to-year variations in the quantities of birch pollens. A simple linear regression with the least squares method was used for studying correlations between the annual quantities of birch pollens and the meteorological factors. A significant positive correlation was found between the hours of sunlight in June of the preceding year and the annual birch pollen concentrations with the correlation coefficient, R = 0.667. Also, we found the significant positive correlation between the hours of sunlight in March and the annual birch pollen concentrations with the correlation coefficient, R = 0.684. These results suggest that the atmospheric birch pollen counts can be predicted from meteorological factors.
authors: Hideaki
authors: H
authors: Shirasaki
authors: Tetsuo
authors: T
authors: Yamamoto
authors: Etsuko
authors: E
authors: Saikawa
authors: Nobuhiko
authors: N
authors: Seki
authors: Kohji
authors: K
authors: Asakura
authors: Akikatsu
authors: A
authors: Kataura
authors: Tetsuo
authors: T
authors: Himi
mesh_terms: D000485:Allergens / Q000276:immunology*; D029662:Betula / Q000254:growth & development* / Q000276:immunology; D006801:Humans; D007564:Japan; D017440:Photoperiod; D011058:Pollen / Q000254:growth & development* / Q000276:immunology; D006255:Rhinitis, Allergic, Seasonal / Q000276:immunology*; D012621:Seasons; D014887:Weather
chemical_list: D000485:Allergens