< p >根据上下文,云分数可能意味着:< / p > < ul > <李> < p >可见天空被云层覆盖的分数(云总分数)。这就是一个观察者从低于或高于认为这就是通常是测量报告的< / p > < /李> <李> < p >特定区域和高度的分数被云层覆盖。这就是典型的报道模式。< / p > < /李> < / ul > < p >不同定义时需要牢记比较模型来测量。< / p > < p >在正常情况下,云是必要但不充分条件降水(< a href = " https://en.wikipedia.org/wiki/Diamond_dust " rel =“nofollow”>一些例外< / >)。< / p > < p >回答你名义上的问题:不,云分数低云层的0 < em > < / em >不意味着它是下雨了。也不意味着没有下雨。记住:云总分数为0意味着一个晴朗的天空,云总分数为1意味着完全覆盖的天空。所以低水平云分数为0意味着< em >没有< / em >低水平的云。< / p > < p >回答你问的问题在你的文章的内容:从统计学的角度来说,是的。量< em >底层云分数< / em >, < em >云光学厚度< / em >,和< em >云总分数< / em >确实包含信息沉淀。< / p > < p >如果云总分数是零,没有降水。 If the cloud fraction for low clouds is zero, but for mid-level or high clouds is non-zero, it may or may not be raining.
Cloud optical thickness should correlate with precipitation occurrence and intensity.
However, these quantities do not provide complete information about precipitation. You can't say with full certainty that a day is rainy based on these quantities alone — but you can say which days certainly aren't.