Isotopic composition of Antarctic Dry Valley nitrate: Implications for NOy sources and cycling in Antarctica
Geophysical Research Letters
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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.
| 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 |
| Google Analytic Metrics | Metrics page |