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Pacific Southwest Research Station
800 Buchanan Street
Albany, CA 94710-0011
Tahoe Science Projects supported by SNPLMA
Distribution of ozone, ozone precursors and gaseous components of atmospheric nitrogen deposition in the Lake Tahoe Basin
This study characterized spatial and temporal distribution of ozone (O3), O3 precursors, O3 formation, and gaseous pollutants that are important contributors to atmospheric nitrogen (N) deposition in the Lake Tahoe Basin. Passive samplers were used to monitor O3, nitric oxide (NO), nitrogen dioxide (NO2), ammonia (NH3), nitric acid (HNO3) and volatile organic compounds (VOCs) on a network of 34 sites inside and outside of the basin. Using statistical and geostatistical models, distribution maps of the measured compounds were created for the entire basin.
On a subset of 10 monitoring sites, real-time O3 concentrations were measured with ultraviolet absorption monitors. At these sites, N deposition was measured with ion exchange resin (IER) collectors placed in forest clearings (bulk precipitation) and under tree canopies (throughfall). In the bulk and throughfall samples from the IER collectors, we measured the stable isotope composition (δ15N and δ18O) of NO3 to evaluate the origin of N deposition in the basin.
|Last Modified: Jul 12, 2016 11:39:55 AM|