Deposition, recycling, and archival of nitrate stable isotopes between the air–snow interface: comparison between Dronning Maud Land and Dome C, Antarctica

• Published in: Atmospheric Chemistry and Physics
• Main Authors: V. H. L. Winton, A. Ming, N. Caillon, L. Hauge, A. E. Jones, J. Savarino, X. Yang, M. M. Frey
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2020
• Subjects: Physics; QC1-999; Chemistry; QD1-999; Dronning Maud Land; East Antarctica; Antarc*; Antarctica; ice core
• Online Access: https://doi.org/10.5194/acp-20-5861-2020; https://doaj.org/article/1da970bb0bc54b8ab4b4052904eba579

The nitrogen stable isotopic composition in nitrate ( δ 15 N - <math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msubsup><mi mathvariant="normal">NO</mi><mn mathvariant="normal">3</mn><mo>-</mo></msubsup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="25pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="4c315b3ea451cf26923ad12993612b33"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-20-5861-2020-ie00001.svg" width="25pt" height="16pt" src="acp-20-5861-2020-ie00001.png"/></svg:svg> ) measured in ice cores from low-snow-accumulation regions in East Antarctica has the potential to provide constraints on past ultraviolet (UV) radiation and thereby total column ozone (TCO) due to the sensitivity of nitrate ( <math xmlns="http://www.w3.org/1998/Math/MathML" id="M3" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msubsup><mi mathvariant="normal">NO</mi><mn mathvariant="normal">3</mn><mo>-</mo></msubsup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="25pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="a186e28964d6ae507e65dbc91f8b1f71"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-20-5861-2020-ie00002.svg" width="25pt" height="16pt" src="acp-20-5861-2020-ie00002.png"/></svg:svg> ) photolysis to UV radiation. However, understanding the transfer of reactive nitrogen at the air–snow interface in polar regions is paramount for the interpretation of ice core records of δ 15 N - <math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msubsup><mi mathvariant="normal">NO</mi><mn ...