the minimum arctic sea ice extent in september is largely affected by three conditions: 1) the ice thickness in the early spring, 2) the beginning of the melt season, and 3) the weather during spring and summer.

Write the above sentence using proper case.
The minimum Arctic sea ice extent in September is largely affected by three conditions: 1) the ice thickness in the early spring, 2) the beginning of the melt season, and 3) the weather during spring and summer.