Chilled Air
In the summer, air is drawn down through sinkholes, flows over very cold groundwater and is released out vents on the slopes. Summer temperatures on the slopes range from 42 °F (6 °C) to 55 °F (13 °C). In winter, the air is drawn into the vents, and the groundwater again freezes. Because of the cool temperatures and moist conditions, unusual plants for this part of the country grow on the slopes. Typically growing in a colder more northern climate, yews, balsam fir, Showy lady's slipper and golden saxifrage can be found on the cool slopes. These cold microclimates of the slopes allow the rare plants and animals to survive.
Read more about this topic: Driftless Area National Wildlife Refuge
Famous quotes containing the words chilled and/or air:
“Your beauty can but leave among us
Vague memories, nothing but memories.
A young man when the old men are done talking
Will say to an old man, “Tell me of that lady
The poet stubborn with his passion sang us
When age might well have chilled his blood.””
—William Butler Yeats (1865–1939)
“They may bring their fattest cattle and richest fruits to the fair, but they are all eclipsed by the show of men. These are stirring autumn days, when men sweep by in crowds, amid the rustle of leaves like migrating finches; this is the true harvest of the year, when the air is but the breath of men, and the rustling of leaves is as the trampling of the crowd.”
—Henry David Thoreau (1817–1862)