Answer :
The cornerstone of the upper air charts is the 500 millibar constant pressure charts. The 500 mb level chart would unquestionably be the best option if meteorologists could only look at one chart.
The cornerstone of the upper air charts is the 500 millibar constant pressure charts. The 500 mb level chart would unquestionably be the best option if meteorologists could only look at one chart. This area is referred to as the "middle" of the atmosphere and ranges in elevation from 16,000 feet (4,980 metres) to about 20,000 feet (6,000 metres). The last digit, zero, is left off of the figure for the 500 mb level constant pressure heights. The actual height in metres can be found by appending a zero to the four-digit height value. For instance, "564" for height indicates that the real height is 5,640 metres (18,503 feet).
To learn more about millibar please click on below link
https://brainly.com/question/24125273
#SPJ4