Southeast Alaska Network
The Southeast Alaska Vital Signs Network (SEAN) consists of three NPS units including Sitka National Historic Park (NHP), Klondike Goldrush NHP, and Glacier Bay National Park and Preserve (NP&Pres). All three NPS units are designated as Class II air quality areas.
The Network map below provides information on air quality monitoring. Wet Deposition is monitored through cooperation with National Atmospheric Deposition Program/National Trends Network (NADP/NTN). Visibility is monitored as part of the Interagency Monitoring of Protected Visual Environments (IMPROVE). Additional details on these parameters are described in Air Quality Monitoring.
Air quality monitoring in or near the network is indicated on the map by symbols, with the blue line showing the approximate borders of the network. The legend shows the symbols for the type of monitoring present, with NPS park units in green.