Study of Growth Rings in Tundra Shrubs Reveals Spread of Arctic `Browning’

As Arctic sea ice steadily disappears and temperatures rise across the region, the tundra has generally been greening, with shrubs and small trees growing more robustly. But a new study of growth rings in Arctic shrubs reveals a countervailing trend — the withering of plants in some areas because summer conditions have grown too hot and dry.

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