Biology
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3213817m&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 13, CiteID L13817
Biology
10
Biogeosciences: Biosphere/Atmosphere Interactions (0315), Biogeosciences: Evolutionary Geobiology, Biogeosciences: Nitrogen Cycling, Biogeosciences: Soils/Pedology (1865), Cryosphere: Biogeochemistry (0412, 0414, 1615, 4805, 4912)
Scientific paper
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.
Bockheim James G.
Kendall Carol
Michalski Greg
Thiemens M. M.
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