part of adjacent to atmospheric boundary layer tropical marine semi-evergreen forest temperate evergreen needleleaf forest tropical lowland evergreen broadleaf rain forest tropical semi-evergreen moist broadleaf forest temperate broadleaf evergreen forest area of evergreen forest An area of a planet's surface which is primarily covered by a forest in which the majority of trees maintain 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. nlcd2011 NLCD:42 According to the NLCD 2011, areas of evergreen forest are dominated by trees generally greater than 5 meters tall, and making up more than 20% of total vegetation cover. The NLCD 2011 continues to state that more than 75% of these trees should maintain their foliage despite seasonal change - the canopy is never without green foliage. Such thresholds - which are themselves fuzzy - are not asserted in this definition. evergreen forest vegetated area