Cloud cover such as the Amazon Rainforest and some others are almost always clear such as the Sahara Desert. Cloud cover Cloud cover (also known as cloudiness, cloudage, or cloud amount) refers to the fraction of the sky obscured by clouds when observed from a particular location. Okta is the usual unit of measurement of the cloud cover. The cloud cover is correlated to the sunshine duration as the least cloudy locales are the sunniest ones while the cloudiest areas are the least sunny places. The global cloud cover averages around 0.68 when analyzing clouds with optical depth larger than 0.1. This
Theory of conjoint measurement All three must therefore be expressed in the same unit. In such cases, it would appear that a level of either "A" or "X" must be tentatively identified as the unit. Hence it would seem that application of conjoint measurement requires some prior descriptive theory of the relevant natural system. Empirical applications of the theory of conjoint measurement have been sparse (; ). Several empirical evaluations of the double cancellation have been conducted. Among these, evaluated the axiom to the psychophysics of binaural loudness. They found the double cancellation axiom was rejected. conducted a similar investigation and replicated Levelt, "et