What question did this study set out to answer?

Quantify the contribution of terrestrial land-surface changes and albedo feedbacks to high-latitude summer warming trends in arctic Alaska.

September 22, 2005Science

Role of Land-Surface Changes in Arctic Summer Warming

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Quantify the contribution of terrestrial land-surface changes and albedo feedbacks to high-latitude summer warming trends in arctic Alaska.
Synthesized observational field data regarding terrestrial land-surface characteristics, vegetation coverage, and summer albedo across arctic Alaska.
Evaluated shifts in snow-free season duration and modeled corresponding local atmospheric heating rates in comparison to projected greenhouse-gas radiative forcing.
Lengthening of the snow-free season correlated with terrestrial summer warming, increasing local atmospheric heating by approximately 3 watts per square meter per decade.
Observed atmospheric heating rate is comparable in magnitude to the regional heating expected over multiple decades from a doubling of atmospheric carbon dioxide.
Projected ongoing expansion of shrubs and trees could further amplify local atmospheric heating by 2 to 7 times.

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Implication

Field data synthesis demonstrates terrestrial albedo reductions drive high-latitude atmospheric heating in arctic Alaska, indicating land-surface feedbacks amplify regional warming.

Cite This Study

Chapin et al. (2005) studied this question.

synapsesocial.com/papers/69d81bf252654bb436d181a9 https://doi.org/10.1126/science.1117368

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Implication

Field data synthesis demonstrates terrestrial albedo reductions drive high-latitude atmospheric heating in arctic Alaska, indicating land-surface feedbacks amplify regional warming.

Role of Land-Surface Changes in Arctic Summer Warming

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Implication

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Role of Land-Surface Changes in Arctic Summer Warming

Key Points

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Implication

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