explain greenhouse effect and it's consequences
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The exchange of incoming and outgoing radiation that warms the Earth is often referred to as the greenhouse effect because a greenhouse works in much the same way.
Incoming UV radiation easily passes through the glass walls of a greenhouse and is absorbed by the plants and hard surfaces inside. Weaker IR radiation, however, has difficulty passing through the glass walls and is trapped inside, thus warming the greenhouse. This effect lets tropical plants thrive inside a greenhouse, even during a cold winter.
A similar phenomenon takes place in a car parked outside on a cold, sunny day. Incoming solar radiation warms the car's interior, but outgoing thermal radiation is trapped inside the car's closed windows.
Incoming UV radiation easily passes through the glass walls of a greenhouse and is absorbed by the plants and hard surfaces inside. Weaker IR radiation, however, has difficulty passing through the glass walls and is trapped inside, thus warming the greenhouse. This effect lets tropical plants thrive inside a greenhouse, even during a cold winter.
A similar phenomenon takes place in a car parked outside on a cold, sunny day. Incoming solar radiation warms the car's interior, but outgoing thermal radiation is trapped inside the car's closed windows.
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the greenhouse effect definition can be written as' the process by which the greenhouse gases in the Earth's atmosphere trap heat from the Sun and prevent the Earth from freezing in the absence of sunlight'. It is a natural phenomenon which prevents stark temperature fluctuations on the Earth during the day and night.
consequences are:
1) More drought and more flooding
Extra water vapour in the atmosphere falls again as extra rain, which can cause flooding in other places in the world.
When the weather gets warmer, evaporation from both land and sea increases. This can cause drought in areas of the world where the increased evaporation is not compensated for by more precipitation.
In some regions of the world this will result in crop failure and famine especially in areas where temperatures are already high. The extra water vapour in the atmosphere will fall again as extra rain, which can cause flooding in other places in the world.
2) Less ice and snow
Towns and villages that are dependent on meltwater from mountain areas may suffer drought and lack of domestic water supply.
Worldwide, glaciers are shrinking rapidly at present. Ice appears to be melting faster than previously estimated. In areas that are dependent on meltwater from mountain areas, this can cause drought and lack of domestic water supply.
According to the IPCC, up to a sixth of the world's population lives in areas that will be affected by meltwater reduction.
3) More extreme weather incidents
The warmer climate will probably cause more heatwaves, more violent rainfall and also an increase in the number and/or severity of storms.
4)Rising sea level
Some Pacific Island nations are expected to be partially or completely submerged by the end of the century.
Sea level rises because of melting ice and snow and because of the thermal expansion of the sea (water expands when warmed). Areas that are just above sea level now, may become submerged.
For example, some Pacific Island nations are expected to be partially or completely submerged by the end of the century. Coastal and shallow marine plants and animals will be affected, for example mangroves and coral reefs
consequences are:
1) More drought and more flooding
Extra water vapour in the atmosphere falls again as extra rain, which can cause flooding in other places in the world.
When the weather gets warmer, evaporation from both land and sea increases. This can cause drought in areas of the world where the increased evaporation is not compensated for by more precipitation.
In some regions of the world this will result in crop failure and famine especially in areas where temperatures are already high. The extra water vapour in the atmosphere will fall again as extra rain, which can cause flooding in other places in the world.
2) Less ice and snow
Towns and villages that are dependent on meltwater from mountain areas may suffer drought and lack of domestic water supply.
Worldwide, glaciers are shrinking rapidly at present. Ice appears to be melting faster than previously estimated. In areas that are dependent on meltwater from mountain areas, this can cause drought and lack of domestic water supply.
According to the IPCC, up to a sixth of the world's population lives in areas that will be affected by meltwater reduction.
3) More extreme weather incidents
The warmer climate will probably cause more heatwaves, more violent rainfall and also an increase in the number and/or severity of storms.
4)Rising sea level
Some Pacific Island nations are expected to be partially or completely submerged by the end of the century.
Sea level rises because of melting ice and snow and because of the thermal expansion of the sea (water expands when warmed). Areas that are just above sea level now, may become submerged.
For example, some Pacific Island nations are expected to be partially or completely submerged by the end of the century. Coastal and shallow marine plants and animals will be affected, for example mangroves and coral reefs
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