Baseline values of Polycyclic Aromatic Hydrocarbons and Trace Metals in the Yukon River sediments, Alaska

Abstract:

The Yukon River drains an area of more than 800 km² across Canada and Alaska and sediments are deposited along the western coast of Alaska in the Bering and Chukchi Seas, and represent most of the sediment deposited in the Chukchi Sea. Suspended sediments, bed load sediments, and historical cores were collected from the last non-marine influenced stretch of the Yukon River and analyzed for the presence and quantity of trace metals, organic carbon, and polycyclic aromatic hydrocarbons (PAH). With C¹⁴ dates from cores sampled from the delta region and intra-annual active river sampling from 2012-2013, some variation will show an annual flux of these materials with a historical comparison. Results of grain size distribution of tested contaminants will suggest contributions to the Chukchi Sea sediment budget.