Windy Weather II: The Correlation Between Barometric Pressure and Wind Velocity

The purpose of this science project was to find the correlation between barometric pressure and wind velocity. I did this by recording the wind velocity in rotations per minute by using an anemometer. I used barometer readings, which I got off an Internet site. The readings measured air pressure in inches. I did this procedure daily starting on October 27, 2003 and ending December 1, 2003. I took the readings at 6:30 am, 11:30 am, 6:00 pm, and 9:30 pm. I converted the wind velocity from rotations per minute to miles per hour using an algebraic formula. I graphed my data on a scatter plot to find the correlation between barometric pressure and wind velocity. I used a scatter plot because it shows the correlation between two variables.I found out that I had a negative correlation between barometric pressure and wind velocity. I knew this because the x-axis (barometric pressure) increased as the y-axis (wind velocity) decreased. I calculated the correlation and found that it was -0.45, not a perfect negative correlation of -1. This showed that there was a relationship between barometric pressure and wind velocity. The data proved that my hypothesis was correct. I hypothesized that as the barometric pressure increased the wind velocity would decrease which my plot showed.My background information also stated that when air currents are rising in a low-pressure zone, the upper atmosphere rotates faster than the lower atmosphere’s high pressure sinking currents. This causes wind to move faster in low pressure than in high pressure because of the faster rotation of air in a low pressure system.

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