Polar amplification: Difference between revisions

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Revision as of 20:22, 28 April 2014 editProkaryotes (talk \| contribs)Extended confirmed users17,246 edits Climate sensitivity and "southern hemisphere"← Previous edit		Revision as of 20:28, 28 April 2014 edit undoNewsAndEventsGuy (talk \| contribs)Extended confirmed users, Pending changes reviewers, Rollbackers27,732 edits Undid revision 606230076 by Prokaryotes (talk) It refers to WARMING and does NOT refer to "Climate changes".... your discussion is still underway and you haven't obtained consensus for thisNext edit →
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	'''Polar amplification''' can refer to amplifying changes in the climate system at the Earth's poles, in response to ]. '''Arctic amplification''', relates to northern hemispheric changes, and '''Antarctic amplifaction''' to amplifying changes at the ~~southern~~ ~~hemisphere~~. Amplifying mechanisms can include, the reduction of snow cover and ], changes in atmospheric and ocean circulation, the presence of anthropogenic soot in the Arctic environment, increases in cloud cover and water vapor. Most studies connect sea ice changes to polar amplification.<ref name="IPCC 2013">{{cite journal\|url=http://www.climatechange2013.org/images/report/WG1AR5_Chapter11_FINAL.pdf\|title=IPCC AR5 - Near-term Climate Change: Projections and Predictability (Chapter 11 / page 983 )\|year=2013}}</ref> The individual processes contributing to polar warming are critical to understand ].<ref>{{cite journal\|url=http://journals.ametsoc.org/doi/abs/10.1175/JCLI-D-12-00696.1\|doi=10.1175/JCLI-D-12-00696.1\|title=A Decomposition of Feedback Contributions to Polar Warming Amplification\|date=\|journal=Climate\|publisher=AMS\|volume=23\|issue=18\|authors=Taylor, Patrick C., Ming Cai, Aixue Hu, Jerry Meehl, Warren Washington, Guang J. Zhang\|date=September 23, 2013}}</ref>		'''Polar amplification''' can refer to amplifying changes in the climate system at the Earth's poles, in response to ]. '''Arctic amplification''', relates to northern hemispheric changes, and '''Antarctic amplifaction''' to amplifying changes at the south pole. Amplifying mechanisms can include, the reduction of snow cover and ], changes in atmospheric and ocean circulation, the presence of anthropogenic soot in the Arctic environment, increases in cloud cover and water vapor. Most studies connect sea ice changes to polar amplification.<ref name="IPCC 2013">{{cite journal\|url=http://www.climatechange2013.org/images/report/WG1AR5_Chapter11_FINAL.pdf\|title=IPCC AR5 - Near-term Climate Change: Projections and Predictability (Chapter 11 / page 983 )\|year=2013}}</ref>


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	== Antarctic amplification ==		== Antarctic amplification ==
	Observation of air temperature only show a slight warming in Antarctica.<ref name = realclimate>{{cite web \|url=http://www.realclimate.org/index.php/archives/2004/12/antarctic-cooling-global-warming/ \|title=Antarctic cooling, global warming? \|work=RealClimate \|date=3 December 2004}}</ref> ] modeling projects a decrease in sea ice cover in Antarctica. However, satellite observations show a slight increase in sea ice at the ~~southern~~ ~~hemisphere~~.<ref>{{cite journal\|url=http://www.climatechange2013.org/images/report/WG1AR5_Chapter11_FINAL.pdf\|title=IPCC AR5 - Near-term Climate Change: Projections and Predictability (Chapter 11 / page 996)\|year=2013}}</ref>		Observation of air temperature only show a slight warming in Antarctica.<ref name = realclimate>{{cite web \|url=http://www.realclimate.org/index.php/archives/2004/12/antarctic-cooling-global-warming/ \|title=Antarctic cooling, global warming? \|work=RealClimate \|date=3 December 2004}}</ref> ] modeling projects a decrease in sea ice cover in Antarctica. However, satellite observations show a slight increase in sea ice at the south pole.<ref>{{cite journal\|url=http://www.climatechange2013.org/images/report/WG1AR5_Chapter11_FINAL.pdf\|title=IPCC AR5 - Near-term Climate Change: Projections and Predictability (Chapter 11 / page 996)\|year=2013}}</ref>

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Revision as of 20:28, 28 April 2014

Polar amplification can refer to amplifying changes in the climate system at the Earth's poles, in response to global warming. Arctic amplification, relates to northern hemispheric changes, and Antarctic amplifaction to amplifying changes at the south pole. Amplifying mechanisms can include, the reduction of snow cover and sea ice, changes in atmospheric and ocean circulation, the presence of anthropogenic soot in the Arctic environment, increases in cloud cover and water vapor. Most studies connect sea ice changes to polar amplification.

Arctic amplification

Main article: Climate change in the Arctic

Arctic amplification, may refer to a greater temperature increase in the Arctic compared to the Earth as a whole as a result of the effect of feedbacks and other processes. It is common to see it stated that "Climate models generally predict amplified warming in polar regions", e.g. Doran et al.

Arctic amplification has been linked to extreme weather in mid-latitudes.

Antarctic amplification

Observation of air temperature only show a slight warming in Antarctica. CMIP5 modeling projects a decrease in sea ice cover in Antarctica. However, satellite observations show a slight increase in sea ice at the south pole.

Arctic Temperature Trend 1987–2007
Antarctic Temperature Trend 1981–2007 (note: temperature scale differs considerably from the Arctic plot)

References

"IPCC AR5 - Near-term Climate Change: Projections and Predictability (Chapter 11 / page 983 )" (PDF). 2013. {{cite journal}}: Cite journal requires |journal= (help)
Arctic Climate Impact Assessment - International Arctic Science Committee
Doran, Peter T.; Priscu, John C.; Lyons, W. Berry; Walsh, John E.; Fountain, Andrew G.; McKnight, Diane M.; Moorhead, DL; Virginia, RA; et al. (31 January 2002). "Antarctic climate cooling and terrestrial ecosystem response". Nature. 415 (6871): 517–20. doi:10.1038/nature710. PMID 11793010.
Evidence linking Arctic amplification to extreme weather in mid-latitudes 17 March 2012 Geophysical Research Letters doi:10.1029/2012GL051000
"Antarctic cooling, global warming?". RealClimate. 3 December 2004.
"IPCC AR5 - Near-term Climate Change: Projections and Predictability (Chapter 11 / page 996)" (PDF). 2013. {{cite journal}}: Cite journal requires |journal= (help)

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