基于光气候区的日照时数特征及变化规律

Variation Characteristics of the Sunshine Duration in All Chinese Light Climate Zones

摘要:

利用1988—2012年中国34个主要城市的日照时数值，从光气候分区的视角，采用线性拟合和累积距平的分析方法.对我国Ⅰ～Ⅴ类光气候区近25年的日照时数总量年变化和季节变化特征进行研究.结果表明：各类光气候区年总日照时数层次分布明显，Ⅱ类至Ⅴ类光气候区日照时数呈逐渐减少趋势，只有Ⅰ类光气候区日照时数呈上升趋势.各类光气候区四季日照时数分布大体与年总量相似，各季节分布略有不同，但气候区四季日照时数的变化速率则各不相同.该研究为我国各类光气候区的日照时数特征及变化规律提供了一种新的理论研究方法，也为我国建筑采光照明及节能提供了科学的基础数据.

关键词:光气候区;日照时数;线性拟合;变化趋势;变化速率

Abstract:

Using the data of sunshine duration over Chinese 34 main cities from 1988 to 2012, the authors studied the changes in annual and seasonal trends of the sunshine duration by liner trend analysis and accumulative anomalies, from the angle of light climate division. It is found that the annual sunshine duration distributes obviously at different levels and reduces from the 2nd to the 5th light climate zone, except the 1st light climate zone. The characteristics of seasonal sunshine duration are similar with that in the whole year, but the increasing or decreasing amplitude is different between 5 light climate zones. This research provides a new theoretical method to understand the changes of light climate in our country and there will be of great significance to guide the architectural lighting design and energy conservation in corresponding areas.

Key words:light climate zones; sunshine duration; linear fitting; changing trend; changing rate