摘要
利用Angstrom模型对唐山市11个观测站日照百分率逐月资料进行拟合,并计算唐山市太阳总辐射值。结果表明,Angstrom模型拟合的决定系数达0.67,日照百分率与太阳总辐射具有较强正相关关系,可用于唐山市太阳总辐射值计算;太阳辐射以80.3 MJ/(m2·10年)的速率逐年下降,1998年之前太阳辐射下降明显,之后缓慢上升,辐射变化阶段性突出;太阳辐射月变化呈单峰分布,5月最高,12月最低;太阳辐射呈"西北少、东南多"的空间分布特征,地形因素可能是太阳辐射分布不均的原因。
The Angstrom model was used to simulate the monthly sunshine percentage of 11 stations in Tangshan City and calculate the total solar radiation.The results showed that R^2 was about 0.67 and there had strong positive correlation between monthly sunshine percentage and solar radiation. The solar radiation decreased before 1998 and then increased.From 1986 to 2015 ,the solar radiation decreased at a rate of 80.3 MJ/m^2 per decade. Monthly solar radiation showed single-peak distributlon,it reached the highest in May and reached the bottom in December.Spatial distribution characteristics of solar radiation were higher in northwest and lower in southeast, and the terrain factors might be responsible for the uneven distribution.
出处
《现代农业科技》
2017年第16期187-188,共2页
Modern Agricultural Science and Technology
