Freezing level
The freezing level or freezing level height (FLH) represents the altitude in which the temperature in a free atmosphere is at 0 °C , i.e. the freezing point of water. FLH is important for weather in mountainous regions and aviation and over time an indicator of climate variability and climate change. Any given measure is valid for only a short period of time, often less than a day as variations in wind, sunlight, air masses and other factors may change the level.
How these numbers are calculated
Each number comes from the Pythagorean system applied to the title “Freezing level”: the Destiny number uses all letters, the Heart’s Desire uses vowels only, and the Dream number uses consonants only. Letter values are summed and reduced until a single digit or master number (11, 22, 33) is reached.