地—气系统（大气和地面）吸收太阳短波辐射（能量收入），又向外发射长波辐射（能量支出），能量收支的差值，称为辐射差额。下图示意沿海某地多年平均辐射差额的月份分配。读图结合材料完成下列各题。
地—气系统内存在着能量传递与转换，传递与转换形式多样，其中能促使温室效应增强的大气过程是大气（）
A．对太阳辐射的散射增强
B．射向地面的辐射增强
C．对太阳辐射的吸收增强
D．射向宇宙空间的辐射增强
参考答案：B
解析：
温室效应即是大气的保温作用，主要是由大气的逆辐射导致的。温室效应的强弱，主要取决于大气逆辐射的强弱，所以促使温室效应增强的大气过程是大气射向地面的辐射增强。选项B正确。
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