explain in detail the concept of greenhouse effect
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The term ‘Greenhouse Effect’ refers to the way certain gases trap heat in the atmosphere, much as the glass in a greenhouse prevents rising warm air from escaping.
Enhancement of this effect by human activity – not the effect itself, which is entirely natural – has experts worried. In fact, Earth, 93 million miles from its energy source – the sun – would be about 32° C colder if certain atmospheric gases did not trap heat. We probably owe existence of life on this planet to the greenhouse effect.
Whether radiation is absorbed depends on the size & type of objects through which it travels. About half of sunlight hitting the outer atmosphere reaches the surface, where it transfers energy to land and water. The surface then sheds that energy as heat, largely infrared radiation ( IR ). If the air contained nothing but its main components almost all of the energy emitted at the surface would radiate uninterrupted back into space.
But in fact, nearly 90 % of that long-wave-length radiation is caught by clouds and gases, which sends much of it down again. The astonishing result is that Earth’s surface is hit daily with twice
as much energy from re-radiated IR out of the atmosphere as from incoming sunlight.
That is because some kinds of molecules, known collectively as ‘greenhouse’ gases, are just the right size and configuration to trap long-wavelength IR and re-radiate it. Most greenhouse gases elude natural chemical cleaning processes in the atmosphere, and many stay aloft from decades to centuries.
hope it helps
Enhancement of this effect by human activity – not the effect itself, which is entirely natural – has experts worried. In fact, Earth, 93 million miles from its energy source – the sun – would be about 32° C colder if certain atmospheric gases did not trap heat. We probably owe existence of life on this planet to the greenhouse effect.
Whether radiation is absorbed depends on the size & type of objects through which it travels. About half of sunlight hitting the outer atmosphere reaches the surface, where it transfers energy to land and water. The surface then sheds that energy as heat, largely infrared radiation ( IR ). If the air contained nothing but its main components almost all of the energy emitted at the surface would radiate uninterrupted back into space.
But in fact, nearly 90 % of that long-wave-length radiation is caught by clouds and gases, which sends much of it down again. The astonishing result is that Earth’s surface is hit daily with twice
as much energy from re-radiated IR out of the atmosphere as from incoming sunlight.
That is because some kinds of molecules, known collectively as ‘greenhouse’ gases, are just the right size and configuration to trap long-wavelength IR and re-radiate it. Most greenhouse gases elude natural chemical cleaning processes in the atmosphere, and many stay aloft from decades to centuries.
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heya mate this is your answer !!
a warning of earth's surface and troposphere (the lowest layer of the atmosphere ) caused by the presence of water vapour, carbon dioxide, methane and certain other gases in the air...
the origins of the term greenhouse effect is unclear.
mate this will help you
a warning of earth's surface and troposphere (the lowest layer of the atmosphere ) caused by the presence of water vapour, carbon dioxide, methane and certain other gases in the air...
the origins of the term greenhouse effect is unclear.
mate this will help you
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