地面空气SO2-4浓度与气团来源关系的分析

对在日本西侧隐岐岛 3年连续监测的地面空气中 ,非海盐硫酸盐 (SO2 - 4)的质量浓度和气团来源频度的两组数据进行了整理、分析 ,并考虑这一地区的大气运动 ,探索了SO2 - 4浓度的月变化与气团频度变化的联系 .研究发现 ,在季风方向交替变化的隐岐岛地区 ,存在规律性的SO2 - 4浓度波 .随着季节的循环 ,东西两侧气团方向交替 ,岛上的SO2 - 4浓度呈规律性变化 .西侧气团使浓度波在秋、冬消散至低值 ,东侧气团使之在春、初夏上升至峰值 .当来自某方面的气团频度达到最大值时 ,岛上的SO2 - 4浓度接近该方向气团的参考浓度 .分析结果表明 ,亚洲大陆侧气团到达隐岐岛 ,对岛上空气中的SO2 - 4贡献很小 ,岛上的SO2 - 4主要来自日本侧

Investigation on the Relationship between Sulfate Aerosol and Air Mass Trajectories over the Oki Island

By analysis the data of monthly-averaged nss-sulfate aerosols concentrations recorded in an three-year period, it is found that there is a regular sulfate concentration wave over the Oki Island in the Japanese Ses in the west side of Japan. The sulfate concentration on the island changes monthly with the air mass frequency from two sides:west and east. The air masses from east have the sulfate aerosols accummlated to form a comcentration wave in spring and early summer,and ones from west have the wave concentration dispelled in autumm and winter. When the air mass frequency from one side arrives at its maximum, the sulfate concentration is the representative value of this side approximately. They are 2.30 and 4.50 micro gram per cubic meter for the air masses from Asia continent and Japan side, respectively.