Ammonia at Blodgett Forest, Sierra Nevada, USA
Item
Title (Dublin Core)
Ammonia at Blodgett Forest, Sierra Nevada, USA
Description (Dublin Core)
Ammonia is a reactive trace gas that is emitted in large quantities by animal agriculture and other sources in California, which subsequently forms aerosol particulate matter, potentially affecting visibility, climate, and human health. We performed initial measurements of NH<sub>3</sub> at the Blodgett Forest Research Station (BFRS) during a two week study in June, 2006. The site is used for ongoing air quality research and is a relatively low-background site in the foothills of the Sierra Nevada. Measured NH<sub>3</sub> mixing ratios were quite low (<1 to ~2 ppb), contrasting with typical conditions in many parts of the Central Valley. Eddy covariance measurements showed NH<sub>3</sub> fluxes that scaled with measured NH<sub>3</sub> mixing ratio and calculated aerodynamic deposition velocity, suggesting dry deposition is a significant loss mechanism for atmospheric NH<sub>3</sub> at BFRS. A simple model of NH<sub>3</sub> transport to the site supports the hypothesis that NH<sub>3</sub> is transported from the Valley to BFRS, but deposits on vegetation during the summer. Further work is necessary to determine whether the results obtained in this study can be generalized to other seasons.
Creator (Dublin Core)
M. L. Fischer and D. Littlejohn
Date (Dublin Core)
2018-08-10
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acpd-7-14139-2007
https://acp.copernicus.org/preprints/acpd-2007-0389/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
