what is global warming and gases which affect global warming
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Global warming is a long-term rise in the average temperature of the Earth's climate system, an aspect of climate change shown by temperature measurements and by multiple effects of the warming.[2][3]The term commonly refers to the mainly human-caused observed warming since pre-industrial times and its projected continuation,[4]though there were also much earlier periods of global warming.[5] In the modern context the terms global warming and climate change are commonly used interchangeably,[6]but climate change includes both global warming and its effects, such as changes to precipitation and impacts that differ by region.[7][8]Many of the observed warming changes since the 1950s are unprecedented in the instrumental temperature record, and in historicaland paleoclimate proxy records of climate change over thousands to millions of years.[2]
In 2013, the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report concluded, "It is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century."[9] The largest human influence has been the emission of greenhouse gases such as carbon dioxide, methane, and nitrous oxide. Climate model projections summarized in the report indicated that during the 21st century, the global surface temperature is likely to rise a further 0.3 to 1.7 °C (0.5 to 3.1 °F) to 2.6 to 4.8 °C (4.7 to 8.6 °F) depending on the rate of greenhouse gas emissions and on climate feedback effects.[10] These findings have been recognized by the national science academies of the major industrialized nations[11][a] and are not disputed by any scientific body of national or international standing.[13][14]
Future climate change effects are expected to include rising sea levels, ocean acidification, regional changesin precipitation, and expansion of deserts in the subtropics.[15][16][17]Future surface temperature increases are expected to be greater over land than over the oceans, and greatest in the Arctic, with the continuing retreat of glaciers, permafrost, and sea ice. Predicted regional precipitation effects
In 2013, the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report concluded, "It is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century."[9] The largest human influence has been the emission of greenhouse gases such as carbon dioxide, methane, and nitrous oxide. Climate model projections summarized in the report indicated that during the 21st century, the global surface temperature is likely to rise a further 0.3 to 1.7 °C (0.5 to 3.1 °F) to 2.6 to 4.8 °C (4.7 to 8.6 °F) depending on the rate of greenhouse gas emissions and on climate feedback effects.[10] These findings have been recognized by the national science academies of the major industrialized nations[11][a] and are not disputed by any scientific body of national or international standing.[13][14]
Future climate change effects are expected to include rising sea levels, ocean acidification, regional changesin precipitation, and expansion of deserts in the subtropics.[15][16][17]Future surface temperature increases are expected to be greater over land than over the oceans, and greatest in the Arctic, with the continuing retreat of glaciers, permafrost, and sea ice. Predicted regional precipitation effects
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Global warming is melting of ice present in both the ends of earth.
The gases affecting it are
CO_,CO2 and chloroforocarbon,carbon techtrachloride.
All these gases are called GREEN HOUSE GAS
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