HR: 0800h
AN: A51B-0029    [Abstracts]
TI: Application of Spectral Analysis to HNO3 Fluxes Over Blodgett Forest
AU: Cohen, R C
EM: rccohen@berkeley.edu
AF: Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 United States
AU: Cohen, R C
EM: rccohen@berkeley.edu
AF: Department of Earth and Planetary Science, University of California, Berkeley, Berkeley, CA 94720 United States
AU: * Farmer, D K
EM: dfarmer@nature.berkeley.edu
AF: Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 United States
AB: Due to its high solubility in water, nitric acid is generally thought to deposit in ecosystems. However, both upward and downward fluxes of the sum of HNO₃ gas and NH₄NO₃ aerosol have been observed by eddy covariance coupled to thermal dissociation-laser induced fluorescence over Blodgett Forest, a mid-elevation Ponderosa pine plantation in the Sierra Nevada's. We analyze cospectra and power spectra from these measurements to gain insight into the scales of turbulence and processes controlling the observed fluxes.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0365 Troposphere: composition and chemistry
DE: 0469 Nitrogen cycling
DE: 0490 Trace gases
DE: 3307 Boundary layer processes
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005