Natural vs anthropogenic climate change - Revision history

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	[[Category:Done ~~2016~~-04-30]]		[[Category:Done 2017-12-31]]
	'''[[Climate change]]''' is any change occurring to the planet's climate either permanently or lasting for long periods of time. It is the cumulative total of two related sources: [[anthropogenic climate change]] and [[natural climate change]].<onlyinclude> [[Anthropogenic]] climate change is defined by the human impact on Earth's climate while natural climate change are the natural climate cycles that have been and continue to occur throughout Earth's history.</onlyinclude><ref name = no1>Climate Change Canada (2015, 11, 27). Causes of Climate Change [Online]. Available: http://climatechange.gc.ca/default.asp?lang=En&n=65CD73F4-1</ref>		'''[[Climate change]]''' is any change occurring to the planet's climate either permanently or lasting for long periods of time. It is the cumulative total of two related sources: [[anthropogenic climate change]] and [[natural climate change]].<onlyinclude> [[Anthropogenic]] climate change is defined by the human impact on Earth's climate while natural climate change are the natural climate cycles that have been and continue to occur throughout Earth's history.</onlyinclude><ref name = no1>Climate Change Canada (2015, 11, 27). Causes of Climate Change [Online]. Available: http://climatechange.gc.ca/default.asp?lang=En&n=65CD73F4-1</ref>

	==Natural Climate Change==		==Natural Climate Change==
	Earth’s climate has always been driven by the amount of incoming and outgoing [[energy]]. Without the influence of humans, the Earth has natural cycles that drive the climate. The major factors contributing to Earth’s natural climate change are determined by the [~~axial~~ tilt\| Earth's orbit around the sun], the output of [[solar energy to the Earth\| energy from our sun]], the [[modes of climate variability\| ocean’s natural cooling and warming cycles]] and the constant variability in volcanic activity. Another factor to consider are the [[glacier\|glacial advances and retreats]] that occur throughout Earth’s history. In the last 650,000 years, there have been around seven [[ice age]]s, the most recent ending around 12,000 years ago.<ref name=no3>NASA (2011, 08, 29). Climate Change: how do we know? [Online]. Available: http://climate.nasa.gov/evidence/</ref> Since then, the Earth has experienced a glacial advance known as the [http://www.meteo.psu.edu/holocene/public_html/shared/articles/littleiceage.pdf\| little ice age], which occurred from the 16th century through to the 19th century. However, earth is still in the natural warming process from this glacial advance and many [[climate change denier]]s erroneously claim that this is the cause for the current dramatic climate changes. Although natural climate factors have some effect on the current global warming, they are not as drowned out by the human induced factors.<ref name = no1/>		Earth’s climate has always been driven by the amount of incoming and outgoing [[energy]]. Without the influence of humans, the Earth has natural cycles that drive the climate. The major factors contributing to Earth’s natural climate change are determined by the [Axial tilt\|Earth's orbit around the sun], the output of [[solar energy to the Earth\| energy from our sun]], the [[modes of climate variability\| ocean’s natural cooling and warming cycles]] and the constant variability in volcanic activity. Another factor to consider are the [[glacier\|glacial advances and retreats]] that occur throughout Earth’s history. In the last 650,000 years, there have been around seven [[ice age]]s, the most recent ending around 12,000 years ago.<ref name=no3>NASA (2011, 08, 29). Climate Change: how do we know? [Online]. Available: http://climate.nasa.gov/evidence/</ref> Since then, the Earth has experienced a glacial advance known as the [http://www.meteo.psu.edu/holocene/public_html/shared/articles/littleiceage.pdf\| little ice age], which occurred from the 16th century through to the 19th century. However, earth is still in the natural warming process from this glacial advance and many [[climate change denier]]s erroneously claim that this is the cause for the current dramatic climate changes. Although natural climate factors have some effect on the current global warming, they are not as drowned out by the human induced factors.<ref name = no1/>

	==Anthropogenic Climate Change==		==Anthropogenic Climate Change==
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	==References==		==References==
	{{reflist}}		{{reflist}}
			[[Category: Uploaded]]

Jmdonev: 1 revision imported: From the summer

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Jmdonev at 22:53, 26 August 2016

2016-08-26T22:53:44Z

New page

[[Category:Done 2016-04-30]]
'''[[Climate change]]''' is any change occurring to the planet's climate either permanently or lasting for long periods of time. It is the cumulative total of two related sources: [[anthropogenic climate change]] and [[natural climate change]].<onlyinclude> [[Anthropogenic]] climate change is defined by the human impact on Earth's climate while natural climate change are the natural climate cycles that have been and continue to occur throughout Earth's history.</onlyinclude><ref name = no1>Climate Change Canada (2015, 11, 27). Causes of Climate Change [Online]. Available: http://climatechange.gc.ca/default.asp?lang=En&n=65CD73F4-1</ref>

==Natural Climate Change==
Earth’s climate has always been driven by the amount of incoming and outgoing [[energy]]. Without the influence of humans, the Earth has natural cycles that drive the climate. The major factors contributing to Earth’s natural climate change are determined by the [axial tilt| Earth's orbit around the sun], the output of [[solar energy to the Earth| energy from our sun]], the [[modes of climate variability| ocean’s natural cooling and warming cycles]] and the constant variability in volcanic activity. Another factor to consider are the [[glacier|glacial advances and retreats]] that occur throughout Earth’s history. In the last 650,000 years, there have been around seven [[ice age]]s, the most recent ending around 12,000 years ago.<ref name=no3>NASA (2011, 08, 29). Climate Change: how do we know? [Online]. Available: http://climate.nasa.gov/evidence/</ref> Since then, the Earth has experienced a glacial advance known as the [http://www.meteo.psu.edu/holocene/public_html/shared/articles/littleiceage.pdf| little ice age], which occurred from the 16th century through to the 19th century. However, earth is still in the natural warming process from this glacial advance and many [[climate change denier]]s erroneously claim that this is the cause for the current dramatic climate changes. Although natural climate factors have some effect on the current global warming, they are not as drowned out by the human induced factors.<ref name = no1/>

==Anthropogenic Climate Change==
Human induced climate change is directly linked to the amount of [[fossil fuel]]s burned, [[aerosol]] releases and [[land use change|land alteration from agriculture]] and [[deforestation]].<ref name = no1/> The beginning of the [[Industrial Revolution]] shows a major spike in [[temperature]] levels and [[climate]] influences. The product of fossil fuel [[combustion|burning]] is the emission of a [[greenhouse gas]]: [[carbon dioxide]] which traps heat. Climate change is generally associated with global warming; however some small areas like the tropical Pacific show that the release of aerosols into the [[atmosphere]] the area has actually cooled (or at least warmed much slower than the rest of the world).<ref>Dr.A.D.Genio (2008, 09). Sparating Natural from Anthropogenic Influences in Twentieth Century Climate Data Recors [Online]. Available: http://www.giss.nasa.gov/research/briefs/delgenio_05/</ref> Figure 2 and 3 below shows the effect of these climate influences.

[[File:203_co2-graph-021116.jpeg|800px|center|thumbnail|Figure 2: Carbon dioxide levels over the last 400,000 years have stayed below 300 [[ppm]] and skyrocketed from 1950's to present.<ref name=no3/> Note the climate changed quite a bit before the industrial revolution. Those changes were natural, the current climate change is largely anthropogenic.]]

Some noticeable evidence occurring from anthropogenic climate change is the overall [[rising sea level| sea level rise]], temperature rise, melting ice sheets and glaciers, increased extreme events such as [[hurricane strength|hurricanes getting stronger]] and [[ocean acidification]]. The oceans naturally rise as glaciers and snow covers melt, however compared to the last century, the rate of rise in the last decade is approaching twice as much.<ref name=no3/> Figure 3 below shows that the Earth has been warming at a frightening rate for the past few decades, and warming is expected to continue for the rest of the 21st century.

[[File:climate-change-33.gif|900px|thumb|center|Figure 3. Sixty years of global warming.<ref>While these data are from NASA, this image was downloaded from http://bgr.com/2014/01/29/global-warming-gif-video/ on September 4th, 2015.</ref>]]

==References==
{{reflist}}