A 60-year atmospheric nitrate isotope record from a southeastern Greenland ice core with minimal postdepositional alteration

• Published in: Atmospheric Chemistry and Physics
• Main Authors: Wei, Zhao, Hattori, Shohei, Tsuruta, Asuka, Jiang, Zhuang, Ishino, Sakiko, Fujita, Koji, Matoba, Sumito, Geng, Lei, Lamothe, Alexis, Uemura, Ryu, Yoshida, Naohiro, Savarino, Joel, Iizuka, Yoshinori
• Format: Text
• Language: English
• Published: 2025
• Subjects: Greenland; Greenland ice core; ice core
• Online Access: https://doi.org/10.5194/acp-25-5727-2025; https://acp.copernicus.org/articles/25/5727/2025/

Stable isotopes of atmospheric nitrate (NO 3 - <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="9pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="5c4cefaf8b78d41c1ce2f2ef151f712f"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-25-5727-2025-ie00001.svg" width="9pt" height="16pt" src="acp-25-5727-2025-ie00001.png"/> </svg:svg> ) are valuable tools for tracing nitrogen sources and processes; however, their signals in ice core records are often disrupted by postdepositional processes. The ice core from the southeastern Dome (SE-Dome) in Greenland is a potential record of variations in atmospheric chemistry that has experienced a lower postdepositional effect owing to a high accumulation rate ( ∼1 m water equivalent per year). Herein, we report 60-year (1959–2014) δ 15 N(NO 3 - <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="9pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="0723f17b5be9fc41c36a5585631feb47"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-25-5727-2025-ie00002.svg" width="9pt" height="16pt" src="acp-25-5727-2025-ie00002.png"/> </svg:svg> ) and Δ 17 O(NO 3 - <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="9pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="a6a4c5911a740e8377438efb607d4b86"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-25-5727-2025-ie00003.svg" width="9pt" height="16pt" src="acp-25-5727-2025-ie00003.png"/> </svg:svg> ) records from the SE-Dome ice core. The δ 15 N(NO 3 - <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="9pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="7de8959157e6c258409d4c11688ca166"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-25-5727-2025-ie00004.svg" width="9pt" height="16pt" src="acp-25-5727-2025-ie00004.png"/> </svg:svg> ) decreased from 1960 to 1974 and exhibited clear seasonal changes (high in summer and low in ...