| 摘要: |
| 近一年的观测结果表明，苏州市区能见度年均值为 15.8km，一年之中，7月能见度水平最好，11月能见度水平最低，月均值为 10.5km。一日之中，早8时左右能见度最差，14时左右最好。导致苏州市区能见度水平下降的主要污染因子为PM2.5，相同PM2.5浓度下，能见度随着湿度的升高而下降。 |
| 关键词: 苏州市 能见度 PM2.5 黑碳 |
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| Analysis on the Variation Characteristics and Effect Factors of Visibility in Suzhou |
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| Abstract: |
| Based on the study and monitoring of visibility in Suzhou recently， the results show that the annual average value of visibility is about 15.8km. Through a year, the maximum visibility occurs in July, and the minimum occurs in November，which was about 10.5km. In a day, the lowest visibility appeared at 8 a.m., and the highest visibility appeared at 2 p.m. The major causes of the decrease of visibility is PM2.5. With the same concentration of PM2.5，the higher relative humidity is，the lower visibility is． |
| Key words: ：Suzhou visibility PM2.5 blackcarbon |
