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Location Information | Location Notes |
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U.S. Forest Service - Pacific Southwest Research Station (USFS - PSW) | Pat Manley - U.S. Forest Service - Pacific Southwest Research Station (USFS - PSW) |
No expected performance measures set for this project.
No annual performance measure accomplishments entered for this project.
Total | |||
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Southern Nevada Public Land Management Act (Pacific Southwest Research Station) (USFS - PSW) | $298,381 | $298,381 | $0 |
Grand Total | $298,381 | $298,381 | $0 |
Total | 2013 | 2012 | 2011 | 2010 | 2009 | |
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Southern Nevada Public Land Management Act (Pacifi... | $298,681 | $59,737 | $59,736 | $59,736 | $59,736 | $59,736 |
Grand Total | $298,681 | $59,737 | $59,736 | $59,736 | $59,736 | $59,736 |
No watersheds set for this project.
No Local and Regional Plans set for this project.
No Related Projects set for this project.
07/10/2017 6:54 PM | Kiara Cuerpo-Hadsall | Objectives: 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. |
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07/10/2017 6:54 PM | Kiara Cuerpo-Hadsall | Findings: Based on four hypotheses tested in this study, the authors have drawn the following conclusions and made some recommendations: Hypothesis 1: While long-range transport from the Central Valley of California has little effect on the air pollution status in the Lake Tahoe Basin, locally emitted VOCs and NOx significantly contribute to increasing O3 concentrations and deterioration of air quality. High concentrations of O3 were observed on the western slope of the Sierra Nevada mountain range and were likely caused by emissions from the Central Valley of California. For this region, the Toluene/Benzene (Tol/Bz) ratios were generally low, which indicates aged air masses and likely regional transport. High O3 concentrations were found in the middle of Lake Tahoe, accompanied by high Tol/Bz and NO/NO2 ratios, as well as high anthropogenic VOC concentrations (especially the higher molecular weight hydrocarbons n-decane and n-undecane). These results may indicate the influence of local spark ignition and diesel engine emissions (for example from large boats). High solar radiation (direct and reflected from the lake surface) over the Lake may promote photochemical reactions and increased production of secondary pollutants such as O3 and HNO3 vapor. *** See www.fs.fed.us/PSW/partnerships/tahoescience for additional findings. |