A Novel Approach to Eddy Covariance Fluxes of NO2, Σ PNs, Σ ANs and HNO3
Abstract
The exchange of reactive nitrogen between the biosphere and atmosphere affects both oxidative atmospheric chemistry and ecosystem nutrient dynamics. Few direct measurements of reactive nitrogen oxide fluxes have been made due to the stringent instrumental requirements for eddy correlation analysis. Thermal dissociation-Laser Induced Fluorescence (TD-LIF) is a sensitive, selective, and fast (5Hz) technique for measuring NO2, sum peroxy nitrates, sum alkyl nitrates, and nitric acid. We have deployed a TD-LIF instrument at the University of California - Blodgett Forest Research Station and used it to evaluate the potential for eddy covariance measurements of the fluxes of each of these 4 categories of NOy. Here we present preliminary analysis of observed fluxes, and extensive diagnostics of instrument performance using spectral analysis.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2004
- Bibcode:
- 2004AGUFM.B13B0220F
- Keywords:
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- 0315 Biosphere/atmosphere interactions;
- 0365 Troposphere: composition and chemistry;
- 0394 Instruments and techniques