title: [Relationship between birch pollen counts and meteorological factors for 8 years in Sapporo].
abstract: Occurrence of airborne pollen in Sapporo was studied for the 8 years between 1995 and 2002. Observations on pollen seasons of cedar, birch, grass, and mugwort are presented. There are wide year-to-year variations in quantities of birch pollens. Simple linear regression by the least squares method was used for studying correlations between annual quantities of birch pollen and the meteorological factors. A highly significant (P = 0.00004) positive correlation was found between precipitation in February of the preceding year and annual birch pollen concentrations with the coefficient of determination, R2 = 0.950. These results suggest that atmospheric birch pollen counts can be predicted from the meteorological factor in the preceding year.
authors.affiliation: Department of Otolaryngology, School of Medicine, Sapporo Medical University, Sapporo.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Shirasaki
authors.forename: Shin-ichirou
authors.initials: S
authors.lastname: Narita
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Watanabe
authors.forename: Etsuko
authors.initials: E
authors.lastname: Kanaizumi
authors.forename: Jun
authors.initials: J
authors.lastname: Satoh
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Konno
authors.forename: Hideki
authors.initials: H
authors.lastname: Ogasawara
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Kohji
authors.initials: K
authors.lastname: Asakura
authors.forename: Akikatsu
authors.initials: A
authors.lastname: Kataura
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Himi
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D029662:Betula; D005544:Forecasting / Q000379:methods; D007564:Japan; D008685:Meteorological Concepts; D011058:Pollen; D012621:Seasons; D013997:Time Factors
chemical_list: D000393:Air Pollutants