酒泉市1958—2016年太阳总辐射变化特征研究

摘 要：选取酒泉市境内敦煌、酒泉气象台站太阳总辐射观测资料及其他气象观测数据，建立太阳总辐射气候学计算模型，补充资料空缺。应用多项式及时间序列分析等方法研究酒泉市太阳总辐射随时间的变化规律；依托ArcGIS地理信息研究境内太阳总辐射空间分布情况，并进行分区。结果表明：酒泉市光资源极为丰富，年太阳总辐射6000~6450 MJ/m2，仅次于国内最大地区的青藏高原，具有很好的开发利用价值。1958—2016年太阳总辐射年际变化平均距平百分率3~4%，年际变幅较小；年际变化呈波动状，存在2个峰值时段和2个谷值时段，2012年之后呈增加趋势。太阳总辐射月变化最大值出现在6月，最小值出现在12月；夏季最多，冬季最少，春秋次之。境内太阳总辐射空间分布由北向南逐步递减，可分成Ⅲ个区，即Ⅰ北部辐射最尤丰富区、Ⅱ中部辐射尤为丰富区和Ⅲ南部辐射丰富区。

Features of Total Solar Radiation Change in 1958-2016, Jiuquan

Based on the observation of total solar radiation and other meteorological data in Dunhuang and Jiuquan meteorological station of Jiuquan City, we established the calculation model of total solar radiation climatology to supplement the data vacancy. The variation of total solar radiation over time in Jiuquan was studied by using polynomial and time series analysis. Based on ArcGIS’s geographic information system, the spatial distribution of total solar radiation within the city border was studied and partitioned. The results showed that, light resource in Jiuquan was very rich, the annual total solar radiation was 6000-6450 MJ/m2, only next to the Qinghai-Tibet plateau in China, and had great value for development and utilization. In 1958- 2016, the mean distance of the total annual change of solar radiation was between 3% and 4% , whose amplitude was small. Interannual variation fluctuated with two peak value periods and two valley value periods, and had an increasing trend after 2012. The maximum monthly variation of total solar radiation appeared in June, while the minimum was in December. The highest amount was in summer, followed by spring and autumn, and the lowest was in winter. The spatial distribution of solar radiation gradually diminished from north to south, and could be divided into three areas: Ⅰwas the extremely rich radiation area in the north; Ⅱ was the more rich radiation area in central and Ⅲ was the rich area in the south.