 Pollutants |
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Pollutants |
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This Lake States ozone map displays the W126 index, providing
a representation of plant response to ozone throughout the growing season of 1997. Ground
level ozone is the primary constituent of smog, and can damage plant tissues and reduce
growth of sensitive species. The sum of ozone concentrations ranged from 6-17 ppm-hours in Lake States forests. These ozone levels have been reported to cause growth reductions in highly sensitive forest species such as black cherry. Levels of around 24 ppm-hours can cause growth reductions in white pine and aspen. Leaf stippling symptoms are visible at lower exposure levels. Click here for more details about ozone in the Great Lakes Assessment area. |
The following higher resolution version of the above map may be viewed by clicking the link below.
| File Name | Format | Resolution | Size |
| ozoveg.gif | GIF | 1024x780 |
For more information contact
David T. Cleland
USDA-Forest Service
Southern Research Station
5985 County Road K
Rhinelander, WI 54501
Phone: 715-362-1117
Email: dcleland@fs.fed.us
