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What are the Impacts of Global Warming in Climate changes ?

What are the Impacts of Global Warming in Climate changes ?

GLOBAL WARMING

  • Global warming refers to increase in average temperature of the earth.
  • This increase is due to the increase in the concentration of greenhouse gases in the atmosphere.

Greenhouse Effect or Glass House Effect

  • Greenhouse effect refers to trapping of heat by the earth’s atmosphere.
  • Greenhouse gases allow sun rays with high frequency and low wavelength to enter earth’s atmosphere.
  • However, heat radiated from the earth in the form of low frequency and high wavelength rays is not allowed by greenhouse gases to move out of the earth’s atmosphere.
  • Increased trapping of heat within earth’s atmosphere leads to increase in the temperature of earth.
  • Greenhouse gases assist earth in maintaining its average temperature (15°C).
  • Absence of greenhouse gases in the atmosphere would cause earth’s average temperature to fall.
  • At the same time, increase in the concentration of greenhouse gases increases the temperature of the earth.

Implications of Global warming

Intergovernmental Panel on Climate Change (IPCC) Report has highlighted various impacts of climate change.

  • The climate change will lead to the melting of polar ice which would increase the water level of oceans and due to this, many islands would submerge.
  • Melting of ice exposes water, which absorb more sunlight than ice and thus would accelerate global warming.                What are the Impacts of Global Warming in Climate changes ?
  • It is believed that climate change will have more impact on the tropical nations rather than temperate or polar nations, because temperature is already higher in the tropical regions.
  • High temperature would increase the rate of evaporation leading to high humidity and rainfall.
  • High humidity would facilitate growth of microorganisms and thus communicable diseases.
  • High temperature would increase the melting of glaciers and thus increase flooding in the rivers. Once the glaciers melt, subsequent years would witness droughts.
  • The IPCC has predicted 2350 as the year when Himalayan rivers would dry up.
  • Changes in the pattern of temperature would alter the rainfall pattern which would further disturb agriculture causing the shortage of food grains.
  • Shortage of food grains would lead to large-scale migration, food riots, etc.                      What are the Impacts of Global Warming in Climate changes ?
  • Increase in temperature of ocean waters would affect the marine life. Water has moderate influence and thus, marine organisms have low tolerance for changes in temperature. Consequently, marine organisms would increasingly die due to global warming, resulting in the loss of marine biodiversity and disturbance in the marine ecosystem.

Evidence of Global Warming

  1. Coral organisms have low tolerance limit to any change in the environment. Increase in temperature leads to coral bleaching and death of large number of corals.
  2. Northernmost tip of Antarctica has developed cracks and chunks of ice have fallen into the ocean.        What are the Impacts of Global Warming in Climate changes ?
  3. The actual recordings of temperature also prove that summers (after 1987) have witnessed the highest temperature. 

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Environment & Biodiversity

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