[题目]下表为北半球年总辐射随纬度的分布表(可能总辐射:考虑了受大气削弱之后到达地面的太阳辐射,有效总辐射:考虑了受大气和云的削弱之后到达地面的太阳辐射).据表完成下列问题.纬度/°N64504030200可能总辐射/(W/m2)139.3169.6196.4216.3228.2248.1有效总辐射/(W/m2)54.471.798.2120.8132.7108.8[1]影响可� 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】下表为北半球年总辐射随纬度的分布表(可能总辐射：考虑了受大气削弱之后到达地面的太阳辐射；有效总辐射：考虑了受大气和云的削弱之后到达地面的太阳辐射)。据表完成下列问题。

纬度/°N

可能总辐射

/(W/m2)

139.3

169.6

196.4

216.3

228.2

248.1

有效总辐射

/(W/m2)

54.4

71.7

98.2

120.8

132.7

108.8

【1】影响可能总辐射量的主导因素是

A. 纬度 B. 地形

C. 大气环流 D. 洋流

【2】导致表中最大有效总辐射量形成的主要原因有

①纬度低，太阳高度角大，到达地面的太阳辐射多

②多晴天，云层的削弱作用弱，到达地面的太阳辐射多

③纬度高，白昼时间长，到达地面的太阳辐射多

④云层厚，保温效应强，到达地面的太阳辐射多

A. ①④ B. ②③ C. ③④ D. ①②

【答案】

【1】A

【2】D

【解析】试题分析：

【1】根据表格数据，可能总辐射量随着纬度的增加而将低，所以主导因素是纬度，A对。地形、大气环流、洋流与可能总辐射量变化规律之间没有相关性，B、C、D错。

【2】表格中最大有效辐射量低纬度高，中高纬度低，因为低纬度地区太阳高度角大，到达地面的太阳辐射多，①对。副热带地区，多晴天，云层的削弱作用弱，到达地面的太阳辐射多，②对。纬度高，虽然白天时间长，但是太阳高度角小，到达地面的太阳辐射少，③错。云层厚，削弱作用弱，到达地面的太阳辐射少，④错。所以D对。

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