P094: Refining Estimates of Atmospheric Deposition for Sediment Particles and Particulate Nutrients in the Lake Tahoe Basin

Lake Tahoe, an oligotrophic lake appreciated for its fresh water and geographic setting, has been reported of its declining water clarity over the past few decades due to nutrient and sediment particle inputs. Contributions from atmospheric deposition of particulate matter (PM) have been suggested to be substantial, yet inadequately quantified. This study established three long-term monitoring sites (July 2013 – August 2014) to measure 24-hr, size-resolved dry and wet PM deposition in near-shore, offshore-background, and upper watershed conditions in the Lake Tahoe Basin.