The lowest part of the troposphere, where friction with the Earth's surface influences air flow, is the planetary boundary layer. This layer is typically a few hundred meters to 2 km (1.2 mi) deep depending on the landform and time of day.he troposphere is the lowest portion of Earth's atmosphere. It contains approximately 75% of the atmosphere 's mass and 99% of its water vapor and aerosols.
Bushnell is a city in Sumter County, Florida, United States. The population was 2,050 at the 2000 census. According to the U.S Census estimates of 2005, the city had a population of 2,119. It is the county seat of Sumter County.
Bunnell, Florida. Bunnell is the county seat of Flagler County Florida, United States, with a population of 2,676 at the 2010 census. The city is part of the DeltonaâDaytona BeachâOrmond Beach, FL metropolitan statistical area and is named after an early resident, Alvah A. Bunnell, a shingle maker and supplier of wood to the area's fledgling rail industry.