摘要
利用焦作市辖区7个县(市)1961 2010年的月日照百分率观测资料,以天文辐射为起始值,采用气候学计算方法获取辖区各站相应的太阳辐射资料。统计分析显示,全市近50 a的年均总辐射量在4625.026～5020.026MJ/m2,受所处太行山南麓的地形影响,区内太阳总辐射呈北低南高分布,与同纬度(30 40°N)内我国中东部地区太阳总辐射北高南低的分布特征相反。年内太阳辐射最少月出现在12月份(1月份次之),与天文辐射最少月相吻合;最多出现在5月份(6月份次之),较天文辐射最多的7月份提前2个月,这与该月日照时数≥6 h天数的晴好天气比率最高相对应。按照太阳能资源评估国家标准(QX/T 89 2008)评估,辖区东南部属于资源很丰富区,北部和西部属于丰富区;辖区太阳能资源均属于稳定级别,但西北部山区稳定程度稍差。全市太阳辐射总量减少幅度明显大于全国平均减幅:20世纪60 70年代,全市平均年均辐射量超过5148.5 MJ/m2(达资源很丰富标准),但在20世纪80年代中前期太阳辐射量锐减,进入21世纪以来减少趋势不明显,市区有回升的态势。另外,年太阳辐射总量年变化曲线围绕着趋势线表现出较明显的波动,且振荡频率在加大。
Using monthly sunshine percentage data,the solar radiation was calculated respectively by the climatological method based on extraterrestrial radiation in Jiaozuo 7 counties（cities） from 1961 to 2010.The statistical results showed that the annual total radiation of the whole city was 4625.026-5020.026 MJ/m2.As the local terrain effects,the solar radiation in its northern was less than that in southern,which was contrary to the solar radiation distribution in middle-east China（latitude 30-40°N）.As for monthly distribution,the least solar radiation was in December（January second）,which is consistent with the astronomical radiation minimum phase;the most appeared in May（June second）,and there were two months in advance,which was corresponded to the ratio of sunny day（the day’s sunshine duration≥6 h）.According to ＂Assessment Method for Solar Energy Resources＂（QX/T89-2008）,the resources in Jiaozuo southeast belonged to very rich region,and that in northern and western belonged to the rich region.Meanwhile,the degree in the whole region belonged to stable degree,and that was relatively weak in the northwest.The decrease tendency of annual average solar radiation in Jiaozuo was more obvious than the average of the whole country： in twentieth century 60-70 years,the average annual amount of radiation is more than 5148.5 MJ/ m2（belonged to very rich region）.Thereafter it declined rapidly in the nineteen eighties early,and the reduce tendency slowed down,even began rising in Jiaozuo urban since the beginning of twenty-first century.In addition,the annual total solar radiation variation curve around the trend line showed obvious fluctuation,and the oscillation frequency was more and more quickly.
出处
《气象与环境科学》
2013年第2期87-91,共5页
Meteorological and Environmental Sciences
基金
中国气象局气候变化专项(CCSF2011-1)
焦作市科技局科技项目"焦作旅游气象监测预报服务平台"(2004-17)资助
关键词
太阳辐射
日照时数
月分布
年际变化趋势
评估
solar radiation
sunshine duration
monthly distribution
annual change trend
assessment
