摘要
利用北京地区1958～2010年太阳辐射资料，分析了该地区地面太阳辐射状况。结果表明，北京地区太阳总辐射量的月变化曲线呈单峰型，月平均最大值出现在5月份，最小值出现在12月份；近53a来北京年太阳总辐射量变化呈波动下降趋势，平均每10a下降235．OMJ／m^2，期间较明显的“变暗期”出现在1975—1992年，1993年后下降趋势减弱，没有出现明显“变亮期”，突变起始点发生在1980年前后；北京地区总辐射量与总云量的变化存在明显的不同步，而与能见度的变化趋势基本一致，说明云量不是造成北京地区地面太阳辐射变化的主要原因，这种变化可能和城市大气清洁程度相关。
Based on the solar radiation observation data in Beijing from 1958 to 2010, the characteristics of solar radiation change for recent 53 years were investigated by using the linear-trend estimate and the Mann-Kendall test. The results showed that the Monthly variation curve of global solar radiation in Beijing is unimodal distribution from 1958 to 2010, and the global solar radiation overally had weakly decreasing tendency over the 53 years at a rate of 235.0 MJ/m2 per 10 years, the obvious decreasing trend appeared in the period 1975 to 1992. The downtrend had been weakening after 1993, however, there was no brightening period appeared. It is visibility, not cloud amount, to affect the global solar radiation in Beijing. Perhaps the local air cleanness would play an import role in long term variation of solar radiation.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2013年第10期1829-1834,共6页
Acta Energiae Solaris Sinica
基金
中国科学院战略性先导科技专项(XDA05090202)
