摘要
运用多项式回归分析和双随机样本检验,模拟日照时数和总辐射及其影响因子(可照时间、总云量和天文辐射、日照百分率)年值和1月值、7月值的三度空间分布场,取得了满意结果。这可应用在无测站地区,仅凭经纬度和海拔估算出上述气候要素值,估算的平均相对误差大多在5％以下(最好的达0.3‰)。
Proceeding from semi-theoretical and semi experiential formulae,and applying polynomical regression analysis and statistical test of double random sample, the poly basic (1-3),higher-degree(2-6)and complete or non-complete polynomical of three location parameters of longi- tude, latitude and altitude are taken as the approximant of the distribution field in three-dimensional space for sunshine duration and solar global radiation, as well as influenced factors (such as possilbe sunshine duration,cloud amount,and astronomical radiation and percentage of sunshine), thus satisfied results are achieved,i, e. f ormulae (2,6,12-14). So in districts without meteorological station,sunshine duration and solar global radiation can be estimated only with the longitude, the latitude and the altitude. Mean relative errors PA of the bulk of best estimated results for annual,Jan. and July values in China come up to common criterion wich is below 5% for practical application,and the PA to estimated annual values of possible sunshine duration and astronomical radiation Cformulae(2,12)3 only with the latitude are equal to 0. 3 and 3(‰) respectively.Based on other climatical elements or them with alignment of three location parameters, the annual values of global radiation are estimated. Tn formulae (1-3) of table 3,the PA≤4. 4%. The computation is simple and convenient and the meaning is clear. Tt doesn't look up any table, so it saves time.
出处
《山地研究》
CSCD
1992年第4期203-210,共8页
关键词
日照时数
总辐射
三度空间
分布场
sunshine duration, possible sunshine duration, global radiation, three- dimensional space,distribution field
