Intensified warming of the Arctic: Causes and impacts on...

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Intensified warming of the Arctic: Causes and impacts on middle latitudes Global and Planetary Change John E. Walsh

Transcript of Intensified warming of the Arctic: Causes and impacts on...

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Intensified warming of the Arctic: Causes and impacts on middle latitudes

Global and Planetary ChangeJohn E. Walsh

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Outline

• Current status update of Arctic

• Drivers and mechanisms of Arctic change

• Impacts on middle latitudes

• Conclusion

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Degree (C)

Annual mean change of surface air temperature in the northern hemisphere over the last 50 years

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Less IceLess reflective surface area

=

More heat absorbed and released by the ocean

Sea Ice Albedo Feedback

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Less IceIncreased atmospheric moisture

Increases Downwelling radiation

Warms lower Troposphere

Water vapor/Infrared feedback loop

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Intensified warming of the Arctic: Causes and impacts on ... Please cite this article as: Walsh, John E., Intensified warming of the Arctic: Causes and impacts on middle latitudes,

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