RT Journal T1 High-resolution mass spectrometric characterization of dissolved organic matter from warm and cold periods in the NEEM ice core A1 JianZhong Xu, Amanda Grannas, CunDe Xiao, ZhiHeng Du, Amanda Willoughby, Patrick Hatcher, YanQing An PB Sciences in Cold and Arid Regions FD 2018-02-01 YR 2018 JF Sciences in Cold and Arid Regions JO Sciences in Cold and Arid Regions VO 10 IS 1 SP 38 DO 10.3724/SP.J.1226.2018.00038 K1 NEEM ice core;FT-ICR-MS;dissolved organic matter LK {http://www.scar.ac.cn/CN/article/article_42.shtml}