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本文应用天空辐射表对三江平原的太阳辐射能进行了测定,实验期间到达三江池塘水面的太阳辐射能为1729047.9kJ/m~2,其中59.5％为直接辐射,40.5％为散射辐射,碧空条件下,各种辐射通量的日变化取决于太阳高度的日变化,都为一半峰曲线。各辐射通量的季节变化除与太阳高度角有关外,还与云量有关。总辐射,散射辐射、直接辐射和反射辐射的半月总量最大值都出现在6月下旬,分别为308822.6kJ/m~2,120621.7Jk/m~2,188200.8kJ/m~2,25489.2kJ/m~2,这主要是由于6月下旬天气晴朗,大气透明度高的缘故。
In this paper, the solar radiant energy of the Sanjiang Plain was measured by sky radiometer. The solar radiation reaching the water surface of Sanjiang Pond during the experiment was 1729047.9kJ / m ~ 2, of which 59.5% were direct radiation and 40.5% were scattered radiation. , The diurnal variation of the various radiant fluxes depends on the diurnal variation of the sun’s altitude and is a half-peak curve. In addition to the seasonal variation of radiant flux, it is also related to the amount of cloud cover. The maximum values of the total monthly total radiation, scattered radiation, direct radiation and reflected radiation all appeared in late June, which were respectively 308822.6kJ / m ~ 2,120621.7Jk / m ~ 2,188200.8kJ / m ~ 2,25489.2kJ / m ~ 2, mainly due to the clear weather in late June and the high degree of transparency of the atmosphere.