| 摘要: |
| 基于北京连续54年太阳辐射数
据，结合中国辐射光当量模型，获取北京
天然光年总照度值和月总照度值。应用
Mann-Kenda l l检验方法分析北京天然
光年和月总照度值年际变化趋势，结果表
明：北京天然光年总照度基本变化趋势为
明显减少，且在1977年突变发生后其下降
趋势明显增加；各月月总照度值基本年际
变化趋势为明显减少，其中7月月总照度值
下降幅度最大，11月月总照度值下降幅度
最小；除5月在1967年发生突变外，其它月
份的突变均发生在1975-1981年之间；各
月天然光月总照度值年际变化在突变前为
不明显波动变化趋势，突变后均为明显增
加的下降趋势。云量及由大气污染所产生
的气溶胶光学厚度是造成北京年与月总
照度值持续下降的重要因素。 |
| 关键词: 太阳辐射 辐射光当量 天然
光照度 天然采光 Mann-Kenda l l法 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（50908239；
51278507） |
|
| Trends of Total Illuminance of Natural Light in Beijing |
|
HE Ying,CHEN Yanjun,WANG Aiying
|
| Abstract: |
| Combined with Chinese luminous efficacy model, this paper gets the
annual and monthly total illuminance values of the natural light based on the solar
radiation data of 54 consecutive years in Beijing. In this paper, the trends of annual
and monthly total illuminance levels in Beijing were analyzed by Mann-Kendall
trend analysis and Mann-Kendall mutation test. The results showed that the basic
trend of annual total illuminance values in Beijing was significantly decreasing and
the declining trend became more evident after mutation occurred in 1977. The basic
trends of the monthly total illuminance values were significantly decreasing. The
monthly illuminace appeared to decline most steeply in July. In contrary, the least
decrease happened in November. Only mutations in May happened in 1967. In other
months, mutations occurred between 1975 and 1981. The fluctuation of the trends of
monthly illuminace values was not apparent before mutation. The declining trend of
monthly total illuminance values significantly increased after mutation. The steady
decline of annual and monthly total illuminance values in Beijing can be primarily
attributed to the aerosol optical thickness caused by cloudiness and atmospheric
pollution. |
| Key words: Solar Radiation Luminous Efficacy Natural Light Illuminace Daylighting Mann-Kendall Method |
