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Cloud amount refers to the fraction of the sky covered by clouds of a particular type or combination. It can refer to a genus, species, variety, layer, or a certain combination of clouds. Always make an estimate of the total cloud cover and also of the cloud amounts of the various genera present.
Total cloud amount is the fraction of the sky covered by cloud of any type or height above the ground. Partial cloud amount is the fraction of the sky covered by each type or layer of cloud...
In meteorology, cloud cover is measured in oktas, or eighths of the sky. If you look up at the sky, and mentally divide it into eight boxes, then imagine all the cloud you can see squashed into these boxes. How many boxes does the cloud fill? This is how many oktas of cloud there are. 0 oktas represents the complete absence of cloud.
Cloud cover (also known as cloudiness, cloudage, or cloud amount) refers to the fraction of the sky obscured by clouds on average when observed from a particular location. Okta is the usual unit for measurement of the cloud cover.
How do we measure clouds? Clouds are measured not only by this weather parameter but by several others. Here we will mention them very briefly, and later we will talk more about each of them in the separate articles. But if you see a link, there is already one, so go to learn more about it:
The fraction of the sky (celestial dome) covered by cloud is called sky cover, cloud cover, or cloud amount. It is measured in eights ( oktas ) according to the World Meteorological Organization. Table 6-7 gives the definitions for different cloud amounts, the associated symbol for weather maps, and the abbreviation for aviation weather reports ...
The total calculated cloud cover depends on the types of clouds present, and can not be derived from the cloud cover of individual layers. For more precision on the effect of cloud cover, use the radiation variable. Measure of cloud cover. Measuring cloud cover is very difficult in practice.
