_:b670469073 . _:b670469073 "An area of a planet's surface which is primarily covered by a forest in which the trees are a mixture between those that lose and retain their foliage despite seasonal change. The surfaces of this area (including the surface of the forest canopy) are in contact with an atmospheric column extending from the planetary boundary layer to the planet's exosphere with little to no physical obstruction." . _:b670469073 . _:b670469073 . _:b670469073 "https://www.mrlc.gov/nlcd11_leg.php" . _:b670469073 "https://en.wikipedia.org/wiki/Exosphere" . _:b670469073 "https://en.wikipedia.org/wiki/Planetary_surface" . _:b670469073 .