Publication Abstracts

Geng et al. 2015

Geng, L., M.C. Zatko, B. Alexander, T.J. Fudge, A.J. Schauer, L.T. Murray, and L.J. Mickley, 2015: Effects of post-depositional processing on nitrogen isotopes of nitrate in the Greenland Ice Sheet Project 2 (GISP2) ice core. Geophys. Res. Lett., 42, no. 13, 5346-5354, doi:10.1002/2015GL064218.

Records of ice-core nitrate and its isotopes hold the potential to assess past atmospheric conditions regarding NOx and oxidant levels. However, relating such records to past atmospheric conditions requires a site-specific understanding of the post-depositional processing of snow nitrate. We report δ15N(NO3-) records from the Greenland Ice Sheet Project 2 (GISP2) ice core over major climate transitions. Model calculations and comparison with records of parameters influencing UV-driven post-depositional processing of snow nitrate suggest that the observed variability in GISP2 δ15N(NO3-) over major climate transitions is primarily driven by changes in the degree of post-depositional loss of snow nitrate. Estimates of the fractional loss of snow nitrate is (16-23)% in the Holocene and (45-53)% in the glacial period, suggesting a (41±32)% lower nitrate depositional flux to Greenland during the glacial period relative to the Holocene.

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BibTeX Citation

@article{ge07100r,
  author={Geng, L. and Zatko, M. C. and Alexander, B. and Fudge, T. J. and Schauer, A. J. and Murray, L. T. and Mickley, L. J.},
  title={Effects of post-depositional processing on nitrogen isotopes of nitrate in the Greenland Ice Sheet Project 2 (GISP2) ice core},
  year={2015},
  journal={Geophysical Research Letters},
  volume={42},
  number={13},
  pages={5346--5354},
  doi={10.1002/2015GL064218},
}

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RIS Citation

TY  - JOUR
ID  - ge07100r
AU  - Geng, L.
AU  - Zatko, M. C.
AU  - Alexander, B.
AU  - Fudge, T. J.
AU  - Schauer, A. J.
AU  - Murray, L. T.
AU  - Mickley, L. J.
PY  - 2015
TI  - Effects of post-depositional processing on nitrogen isotopes of nitrate in the Greenland Ice Sheet Project 2 (GISP2) ice core
JA  - Geophys. Res. Lett.
JO  - Geophysical Research Letters
VL  - 42
IS  - 13
SP  - 5346
EP  - 5354
DO  - 10.1002/2015GL064218
ER  -

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