喀纳斯国家级森林公园景区夏秋季空气负离子浓度变化特征
Comparison on Air Anion Concentration at the Scenic Spots of Kanas National Forest Park

对新疆喀纳斯国家级森林公园景区内水体、林地、草地和游客中心等4种不同功能区的空气正、负离子浓度进行监测，并对其空气质量进行评价。结果表明，喀纳斯景区空气负离子浓度平均为1 185个？cm-3 。4种功能区空气负离子浓度由大到小的排序为水体（1 590个？cm-3）＞林地（1 230个？cm-3）＞草地（1 038个？cm-3）＞游客中心（885个？cm-3），各功能区间空气负离子浓度差异显著。水体、林地、草地的空气质量属于A级；游客中心空气质量属B级。不同功能区空气负离子日变化均为双峰型，12:00为全天最高值。空气负离子浓度月变化除水体为8月最高，其他3个功能区均表现为7月最高，9月最低，夏季优于秋季。
Concentrations of negative and positive ions in four functional areas (waters, forests, grasslands and tourist centre) in Kanas National Forest Park of Xinjiang were measured to evaluate the air quality of the area. The results showed that the average air anion concentration was 1 185 cm-3, highest in waters (1 590 cm-3), followed by forests (1 230 cm-3), grasslands (1 038 cm-3), and tourist center (885 cm-3). The differences in anion concentration in different functional zones were significant. The air quality of waters, forests and grasslands belonged to class A, while tourist center belonged to class B. The daily change of air anion concentration in four different functional zones all exhibited double peaks, and highest at 12:00. The monthly change of air anion concentration indicated that the highest value of waters occurred in August, while those of other three functional zones occurred in July, the lowest values occurred in September, Summer was better than autumn