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Isotopic composition of Antarctic Dry Valley nitrate: Implications for NOy sources and cycling in Antarctica

Geophysical Research Letters

By:
, , , and
https://doi.org/10.1029/2004GL022121

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Abstract

Nitrates minerals from the Dry Valleys of Antarctica have been analyzed for their oxygen and nitrogen isotopic compositions. The 15N was depleted with δ15N values ranging from −9.5 to −26.2‰, whereas the 17O and 18O isotopes were highly enriched (with excess 17O) with δ18O values spanning 62–76‰ and Δ17O values from 28.9 to 32.7‰. These are the largest 17O enrichments observed in any known mineral. The oxygen isotopes indicate that nitrate is from a combination of tropospheric transport of photochemically produced HNO3 and HNO3 formed in the stratosphere.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Isotopic composition of Antarctic Dry Valley nitrate: Implications for NOy sources and cycling in Antarctica
Series title:
Geophysical Research Letters
DOI:
10.1029/2004GL022121
Volume:
32
Issue:
13
Year Published:
2005
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters
First page:
1
Last page:
4