Application of thermal-dissociation laser induced fluorescence (TD-LIF) to measurement of HNO3, Σalkyl nitrates, Σperoxy nitrates, and NO2 fluxes using eddy covariance
Other literature type
Farmer, D. K.
Wooldridge, P. J.
Cohen, R. C.
(issn: 1680-7324, eissn: 1680-7324)
Nitrogen exchange between the atmosphere and biosphere directly influences
atmospheric composition. While much is known about mechanisms of NO and
N<sub>2</sub>O emissions, instrumentation for the study of mechanisms contributing
to exchange of other major nitrogen species is quite limited. Here we
describe the application of a new technique, thermal dissociation-laser
induced fluorescence (TD-LIF), to eddy covariance measurements of the fluxes
of NO<sub>2</sub>, total peroxy acyl and peroxy nitrates, total alkyl and
multifunctional alkyl nitrates, and nitric acid. The technique offers the
potential for investigating mechanisms of exchange of these species at the
canopy scale over timescales from days to years. Examples of flux
measurements at a ponderosa pine plantation in the mid-elevation Sierra
Nevada Mountains in California are reported and used to evaluate instrument