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Alaska
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boreal
6
permafrost
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borehole
4
Arctic
2
aerial photography
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climate change
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lichen
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remote sensing
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shrub increase
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thermokarst
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tree
2
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2
Beringia
1
Béringie
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Pleistocene
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Q
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Russie
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Science
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aboveground
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aboveground biomass
1
biogeography
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