Climate & Treeline Facts

Arctic treeline

Located at 66 ° latitude, -117° longitude.

The Arctic treeline is the furthest north in the Northern Hemisphere that trees can grow. Further north, it is too cold to sustain trees; this occurs for two main reasons.

  • Temperature: This region is so cold that the sap that feeds the trees freezes and cannot do its job. The trees will be stunted or die.
  • Permafrost (frost that remains from one winter to the next) in the soil can prevent trees from getting their roots deep enough for the necessary structural support.

The treeline is not a fixed line, as it changes depending on weather conditions. In fact, one of the signs of global warming is that the treeline is moving more north over the years.

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