First measurements and modeling of Δ17O in atmospheric nitrate

Details First measurements and modeling of Δ17O in atmospheric nitrate First measurements and modeling of Δ17O in atmospheric nitrate

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30pas14m&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 16, pp. ASC 14-1, CiteID 1870, DOI 10.1029/2003GL017015

Mathematics

Logic

22

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Evolution Of The Atmosphere, Atmospheric Composition And Structure: Pollution-Urban And Regional (0305), Geochemistry: Isotopic Composition/Chemistry, Oceanography: Biological And Chemical: Biogeochemical Cycles (1615)

Scientific paper

Atmospheric nitrate is anomalously enriched in both the 18O/16O and 17O/16O isotopic ratios, with Δ17O = 20-30.8‰ (Δ17O = δ17O - .52 × δ18O). We have modeled the seasonal variation in Δ17O by utilizing the transfer of Δ17O from ozone to HNO3 during NOx oxidation reactions and by evaluating the relative source strengths of heterogeneous and homogenous HNO3 production. The implications for new insights into the global nitrogen cycle, N2O production and paleoclimate studies are discussed.

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