http://earthenginepartners.appspot.com/science-2013-global-forest

Although not specific to Columbus, the link is a great global resource. It shows global forests change over time, all the way down practically to the individual tree.
The map is so detailed that it shows the loss of trees at the Scioto Riverfront when they were removed to rebuild Bicentennial Park as part of the Scioto Mile.
So check it out!