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math, physics, and chemistry
>
ground radiation balance
地面辐射平衡
1>辐射平衡日变化特征:
辐射平衡最大值出现在正午以前,最小值出现在傍晚,一天有两次通过零点,一次在日出后,一次在日落前(太阳高度角约10~15度)。
2>辐射平衡年变化特征:
辐射平衡夏季为正,最大为6月,最小值在12月
3>辐射平衡随纬度变化特征:
纬度39为零,超过39小于零,小于39大于零