Coupling between Arctic feedbacks and changes in poleward energy transport

Details Coupling between Arctic feedbacks and changes in poleward energy transport Coupling between Arctic feedbacks and changes in poleward energy transport

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3817704h&link_type=abstract

Geophysical Research Letters, Volume 38, Issue 17, CiteID L17704

Physics

Geophysics

1

Global Change: Global Climate Models (3337, 4928), History Of Geophysics: Atmospheric Sciences, Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Paleoceanography: Atmospheric Transport And Circulation, Paleoceanography: Albedo

Scientific paper

The relationship between poleward energy transport and Arctic amplification is examined using climate models and an energy balance model. In 21st century projections, models with large Arctic amplification have strong surface albedo and longwave cloud feedbacks, but only weak increases (or even decreases) in total energy transport into the Arctic. Enhanced Arctic warming weakens the equator-to-pole temperature gradient and decreases atmospheric dry static energy transport, a decrease that often outweighs increases from atmospheric moisture transport and ocean heat transport. Model spread in atmospheric energy transport cannot explain model spread in polar amplification; models with greater polar amplification must instead have stronger local feedbacks. Because local feedbacks affect temperature gradients, coupling between energy transports and Arctic feedbacks cannot be neglected when studying Arctic amplification.

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