到达大气上界太阳辐射的分布有什么规律 到达大气上界太阳辐射的分布有什么规律

2025-04-07 05:37:09
推荐回答(1个)
回答1:

低纬度地区天文辐射的季节变化明显小于高纬度地区,而全年天文辐射总量是低纬度地区大于高纬度地区.
天文辐射的纬度变化梯度,无论在南半球还是在北半球都是冬季大于夏季.
在春分日和秋分日,太阳直射赤道,使赤道上的天文辐射最大,向两极天文辐射减少,到北极点和南极点为0.
在夏至日,太阳直射北回归线,北半球白昼时间加长,且纬度越高白昼越长,到北极圈以北出现极昼.北极及高纬地区太阳辐射虽低,但由于日照时间长,接受的天文辐射最大.然而,即使如此,北极地区也仅比赤道多接受约10的七次方的天文辐射.从北回归线向南,天文辐射逐渐减少,到北极圈以南,出现极夜,天文辐射为0.
在冬至日,太阳直射南回归线,南半球白昼时间加长,且纬度越高白昼越长,到南极圈以南出现极昼.南极及高纬地区接受的天文辐射最大,且其范围大于夏至日的北极及高纬地区,因为这段时间地球位于近日点附近.从南回归线向北,天文辐射逐渐减少,到北极圈以北,出现极夜,天文辐射为0.
总的来说,天文辐射不但随纬度的变化而变化,还随季节的变化而变化.
希望能解决您的问题.

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