Description: Air is one of our precious natural resources as it provides oxygen, which is vital to all living creatures. Air is responsible for change in climate as it plays a role in heat exchange of winds, thus creating a atmosphere to live in. Hence, it is essential to understand the role of air in climate change. Getting Natural Resources Homework Help is very easy, fill in the form and send now
For the existence of life, we depend of various factors such as sun, water, air, soil and land. Resources like land, water and air are obtained from our planet Earth. The outer crust of the earth is called as lithosphere. Another layer is made up of air and other inert gas which covers our planet globally is defined as the atmosphere. 75% of our planet surface is composed of water. This layer of earth is defined as hydrosphere. A combination of lithosphere, atmosphere and hydrosphere results in existence of life and living beings. The land where life exists is defined as biosphere.
All living creatures require oxygen for their normal living process such as respiration, metabolic activities etc. Air in our planet is made up of 21% oxygen and 0.03% carbon dioxide. However, the air present in other planets like Mars and Venus contains about 95-97% carbon dioxide, and hence no life exists in those planets.
Air is a bad conductor of heat. The heat caused by sun and its radiation during daylight hour results in heating up the water present in water bodies like sea, ocean, lakes and ponds. The radiation of sun heats up the land and the sun’s heat is reflected back to the atmosphere, thus making the air above the land hot. The heated water from the water bodies and results in formation of water vapor, thus making the air above the water bodies cooler. The formation of hot air and cool air in the atmosphere results in the setting up of convection currents in the air. The convection currents are responsible for exchanging the hot and the cold air. In the evening, the hot air present in the atmosphere is pushed off outside earth and the cool air above water bodies is pushed towards land area, thus resulting in cooling off the air present in the earth. The water vapor present in the air also contributes towards cooling of the air. Water vapor is gradually collected in the form of clouds and further condensation of which results in rain fall on the land.
Uneven heating from various regions of earth, changed direction of winds, rotation of earth, rise in level of water causes changes in climate.
Atmosphere in the coastal regions:
Cities which have beaches and sea follow a pattern of heat exchange in the air. The air above the land is heated and the air in the atmosphere creates low pressure. The air present above the sea moves in to the area of low pressure. Thus during the day, the direction of air is from sea to land. During night time, the air above the land and water is cool. But as water cools down slower than land, the air above water would be warmer compared to that of land.