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

Geophysical Research Letters

By:
, , ,
DOI: 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 ??15N values ranging from -9.5 to -26.2???, whereas the 17O and 18O isotopes were highly enriched (with excess 17O) with ?? 18O values spanning 62-76??? and ?? 17O 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. Copyrigbt 2005 by the American Geophysical Union.

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
Number of Pages:
4