Alaska Regional Haze Overview Division of Air Quality

Presentation Overview • Analysis: Haze Characterization at Class I Areas • Analysis: Transboundary Sources,

Analysis: Haze Characterization at Class One Areas

Analysis: Transboundary Sources and Seasonal Patterns

Arctic Haze • Air enters Alaska from the Arctic • Occurs in winter •

Asian Dust • Air enters Alaska from Asia, especially China • Occurs in spring

Wildfire Smoke • Wildfires in Alaska, Canada, and Siberia produce smoke that reaches the

Modeling of emissions plumes and back trajectories Emissions from marine shipping Monitoring of transboundary

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Alaska Regional Haze Overview Division of Air Quality Alaska Department Of Environmental Conservation

Presentation Overview • Analysis: Haze Characterization at Class I Areas • Analysis: Transboundary Sources, Seasonal Patterns • Reflections: What can’t we control? • Summary: What do we need?

Analysis: Haze Characterization at Class One Areas

Regional Haze Impacts - Denali

Regional Haze Impacts - Denali

Regional Haze Impacts - Tuxedni

Regional Haze Impacts - Simeonof

Analysis: Transboundary Sources and Seasonal Patterns

Arctic Haze • Air enters Alaska from the Arctic • Occurs in winter • Layered haze • Characterized by sulfate, metals and light absorbing carbon

Asian Dust • Air enters Alaska from Asia, especially China • Occurs in spring • Layered haze • Characterized by soil elements and metals

Wildfire Smoke • Wildfires in Alaska, Canada, and Siberia produce smoke that reaches the park • Occurs in summer • Layered or regional haze depending on the fires’ locations • Characterized by potassium and organic and elemental carbon

Reflections: What can’t we control?

Summary: What do we need?

Modeling of emissions plumes and back trajectories Emissions from marine shipping Monitoring of transboundary sources Understanding of biogenic emissions- climate, fire, wetlands and land cover modeling