Title

Origin of Atmospheric Mercury Deposition to Pacific Northwest Alpine Lakes

Abstract

Pacific Northwest lakes mainly receive their atmospheric weather patterns from Asia and as a result also receive many pollutants in the form of wet and dry deposition. Alpine lake water samples from the Big Horn Crags in the Frank Church Wilderness Area (Idaho), Olympic National Park (Washington), City of Seattle Watershed Reservoirs, and the Eagle Cap Wilderness area (Oregon) were analyzed for isotopic mercury. Water samples from these lakes are currently being isotopically analyzed using an inductively coupled plasma-mass spectrometry-quadrupole (ICP-MS-Q ). Frank Church, Eagle Cap, Seattle watershed, and Olympia National Park samples show mercury concentrations in the low parts-per-trillion (ppt) and parts-per-quadrillion range (ppq). Initial analysis shows that mercury concentrations decrease as air fronts go inland.Samples will later be analyzed for 198Hg, 199Hg, 201Hg, 202Hg that will fingerprint the origin of mercury. Sources of mercury include United States and China coal pollution, and volcanic emission.

Faculty Sponsor

Frank Dunnivant

Sponsor Department/Programs

Chemistry

Tracks

Secrets of the Deep

Location

Science 100

Presentation Type

Oral Presentation

Research Funding Source or OCS Program

This research was funded by the Louis B. Perry Summer Research Grant

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Apr 19th, 2:00 PM Apr 19th, 2:15 PM

Origin of Atmospheric Mercury Deposition to Pacific Northwest Alpine Lakes

Science 100

Pacific Northwest lakes mainly receive their atmospheric weather patterns from Asia and as a result also receive many pollutants in the form of wet and dry deposition. Alpine lake water samples from the Big Horn Crags in the Frank Church Wilderness Area (Idaho), Olympic National Park (Washington), City of Seattle Watershed Reservoirs, and the Eagle Cap Wilderness area (Oregon) were analyzed for isotopic mercury. Water samples from these lakes are currently being isotopically analyzed using an inductively coupled plasma-mass spectrometry-quadrupole (ICP-MS-Q ). Frank Church, Eagle Cap, Seattle watershed, and Olympia National Park samples show mercury concentrations in the low parts-per-trillion (ppt) and parts-per-quadrillion range (ppq). Initial analysis shows that mercury concentrations decrease as air fronts go inland.Samples will later be analyzed for 198Hg, 199Hg, 201Hg, 202Hg that will fingerprint the origin of mercury. Sources of mercury include United States and China coal pollution, and volcanic emission.