What is the meaning / definition of Yield Management in the hospitality industry? Simply put, the purpose of Yield Management (aka Revenue Management) is to achieve maximum revenue/profit. To do this, a yield management strategy needs to be both reflective and forward-looking.
Scientists call the ionosphere an extension of the thermosphere. So technically, the ionosphere is not another atmospheric layer. The ionosphere represents less than 0.1% of the total mass of the Earth's atmosphere.
The innermost layer, the troposphere, contains most of the planet's weather and extends out to 10â15km above the surface. The next layer out, the stratosphere, is drier and less dense and extends out to about 50km. The Sun's UV light breaks down oxygen in the stratosphere to form the Earth's protective ozone layer. The mesosphere, thermosphere, and ionosphere make up the remaining outer layers that extend out to about 100km. Image: The rising Sun highlights Earth's atmosphere in this photo taken from the International Space Station (credit: NASA/SPL).