Future Climate ChangeThe Greenhouse Effect Causes The Atmosp

Future Climate ChangeThe Greenhouse Effect Causes The Atmosp

The Greenhouse Effect Causes The Atmosphere To Retain Heat

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Author: john king
Length: 28 page(s)
Written: Jan 2016
Sales Rank: - XinXii Sales Rank
Views: 1536

Category: Business & Politics » Environmental Management  |  Work: Whitepaper
Keywords: climate change

The Greenhouse Effect Causes The Atmosphere To Retain Heat

Earth's temperature depends on the balance between energy entering and leaving the planet’s system. When incoming energy from the sun is absorbed by the Earth system, Earth warms. When the sun’s energy is reflected back into space, Earth avoids warming. When absorbed energy is released back into space, Earth cools. Many factors, both natural and human, can cause changes in Earth’s energy balance, including:
Models that account only for the effects of natural processes are not able to explain the warming observed over the past century. Models that also account for the greenhouse gases emitted by humans are able to explain this warming.
Source: U.S. National Climate Assessment (2014)
Variations in the sun's energy reaching Earth
Changes in the reflectivity of Earth’s atmosphere and surface
Changes in the greenhouse effect, which affects the amount of heat retained by Earth’s atmosphere
These factors have caused Earth’s climate to change many times.
Scientists have pieced together a record of Earth’s climate, dating back hundreds of thousands of years (and, in some cases, millions or hundreds of millions of years), by analyzing a number of indirect measures of climate such as ice cores, tree rings, glacier lengths, pollen remains, and ocean sediments, and by studying changes in Earth’s orbit around the sun. [2]
This record shows that the climate system varies naturally over a wide range of time scales. In general, climate changes prior to the Industrial Revolution in the 1700s can be explained by natural causes, such as changes in solar energy, volcanic eruptions, and natural changes in greenhouse gas (GHG) concentrations. [2]
Recent climate changes, however, cannot be explained by natural causes alone. Research indicates that natural causes do not explain most observed warming, especially warming since the mid-20th century. Rather, it is extremely likely that human activities have been the dominant cause of that warming. [2


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