First measurements and modeling of Δ 17 O in atmospheric nitrate | Zendy

Michalski Greg | Zendy; Scott Zack | Zendy; Kabiling Melanie | Zendy; Thiemens Mark H. | Zendy

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First measurements and modeling of Δ 17 O in atmospheric nitrate

Author(s) -

Michalski Greg,

Scott Zack,

Kabiling Melanie,

Thiemens Mark H.

Publication year - 2003

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/2003gl017015

Subject(s) - ozone , nitrate , atmospheric sciences , nitrogen , atmospheric chemistry , paleoclimatology , environmental science , environmental chemistry , atmosphere (unit) , analytical chemistry (journal) , chemistry , mineralogy , meteorology , geology , climate change , physics , oceanography , organic chemistry

Atmospheric nitrate is anomalously enriched in both the 18 O/ 16 O and 17 O/ 16 O isotopic ratios, with Δ 17 O = 20–30.8‰ (Δ 17 O = δ 17 O − .52 × δ 18 O). We have modeled the seasonal variation in Δ 17 O by utilizing the transfer of Δ 17 O from ozone to HNO 3 during NO x oxidation reactions and by evaluating the relative source strengths of heterogeneous and homogenous HNO 3 production. The implications for new insights into the global nitrogen cycle, N 2 O production and paleoclimate studies are discussed.

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