粤东地区辐射量的分布特征  

Characteristics of Radiation Distribution in Eastern Guangdong

作　　者：夏云 陈裕强 卢尉 田盛林 陈浩 蔡锐青 林巧美 XIA Yun;CHEN Yuqiang;LU Wei;TIAN Shenglin;CHEN Hao;CAI Ruiqing;LIN Qiaomei(Jieyang Early Warning Release Center,Jieyang 52200;Jieyang Meteorological Service,Jieyang 52200;Huilai Meteorological Service,Huilai 51520;Jiexi Meteorological Service,Jiexi 515400)

机构地区：[1]揭阳市突发事件预警信息发布中心,广东揭阳522000 [2]揭阳市气象局,广东揭阳522000 [3]惠来县气象局,广东惠来515200 [4]揭西县气象局,广东揭西515400

出　　处：《广东气象》2024年第6期7-11,共5页Guangdong Meteorology

基　　金：广东省气象局科学技术研究项目(GRMC2021Q21)。

摘　　要：基于2001—2020年汕头各月太阳总辐射观测数据、粤东各地区辐射再分析资料和各月的日照百分率数据,采用Angstrom公式进行回归拟合,获得经验系数,并进行检验,得到汕头太阳辐射量计算值,通过与实况观测值对比分析,判断方法可用性,从而计算粤东各地区太阳辐射量,结果表明:(1)公式计算所得辐射量数据与汕头观测实况数据历年各月平均辐射量变化趋势一致,年平均辐射量差值仅有19.77 MJ/m^(2),误差率仅有0.38%,年相关系数通过置信水平95%的显著性检验,且标准化均方根误差小于1,该方法得到的辐射量值是可靠有效的。(2)粤东各地区历年年平均辐射量介于5018.7~5444.4 MJ/m^(2);月平均辐射量均呈现明显的单峰特征,2—7月均呈现明显的上升趋势,随后逐月下降。(3)粤东各地区辐射量基本上呈现北低南高的分布趋势,且沿海地区高于内陆地区。Based on the monthly observations of total solar radiation for Shantou,radiation reanalysis data and monthly sunshine percentages for all parts of eastern Guangdong from 2001 to 2020,this study used the Angstrom formula for regression fitting to obtain empirical coefficients and tested them before computing the solar radiation for the city.The computed values were then compared with the observed ones to determine the usability of the approach for derivation of the solar radiation in all parts of eastern Guangdong.The results are shown as follows.(1)The radiation data derived by the formula tend to be consistent with the observed ones in terms of the monthly mean radiation for Shantou in the study years,with an annual average difference of 19.77 MJ/m^(2)only,or an error rate of just 0.38%.Additionally,the annual correlation coefficient passes the significance test of 95%confidence level with the standardized root-mean-square error less than 1,suggesting that the radiation values determined by the approach is both reliable and effective.(2)For all parts of eastern Guangdong in the study years,the annual average radiation is between 5018.7 and 5444.4 MJ/m^(2)and the monthly average radiation is clearly unimodal,tending to rise significantly from February to July before falling month by month afterwards.(3)For all parts of eastern Guangdong,basically more radiation is distributed in the south than in the north with coastal areas tending to be higher than the inland areas.

关 键 词：太阳辐射 辐射量分布 再分析资料 经验系数 粤东地区 

分 类 号：P422[天文地球—大气科学及气象学]