Abstract: In this paper, the airborne allergic pollen grains from April 1, 1985 to March 31, 1986 in Tianjin is reported. The samples were collected from higher (15.47 m) and lower (2m) levels. The peak of pollen grains appears in Spring (April) and Autumn (August to September) in this city. In Spring peak the pollen grains are mainly from the trees (such as Fraxinus, Ulmus and Populus) and in the Autumn peak from the herbs (such as Chenopodiaceae, Artemisia, Humulus and Gramineae). The relationships among the quantity of airborne pollen and climate and between the diffusion patterns of various pollen grains and the pollen quantity from higher and lower levels are discussed in the present paper.

Key words: Airborne pollen, Allergy