Ross Ice Drainage System (RIDS) Glaciochemical Analysis

Abstract: The Ross Ice Drainage System (RIDS) project provides a high-resolution record of atmospheric chemical deposition taken from several ice cores and snow pits located at sites within or immediately adjacent to the Ross Ice Drainage System. Three sites were visited during a 1995 traverse in inland West Antarctica. The traverse was 158 km, trending 26° from Byrd Surface Camp. The core from site A (78°44'S, 116°20'W) is 148 m deep, the core from site B (79°27.66'S, 118°02.68'W) is 60 m deep, and the core from site C (80°00.85'S, 119°33.73'W) is 60 m deep. Glaciochemical analysis focuses on the major ions deposited from the antarctic atmosphere, including Na (sodium), NH4 (ammonium), K (potassium), Mg (magnesium), Ca (calcium), Cl (chloride), NO3 (nitrate), and SO4 (sulfate). Chemical analysis also includes methanesulfonic acid (MSA) and nssSO4 (non-sea salt sulfate). The data are available by FTP in ASCII text format and Excel files.

摘要：罗斯冰排水系统（Ross Ice Drainage System，RIDS）项目依托取自罗斯冰排水系统内部及紧邻区域的多个冰芯与雪坑样品，构建了大气化学沉积的高分辨率记录。1995年，研究团队于西南极内陆开展了总长158千米的穿越考察，从伯德地面营地（Byrd Surface Camp）出发，沿26°方位角行进。本次考察共设置三个采样点：A点（南纬78°44′，西经116°20′）的冰芯深度达148米，B点（南纬79°27.66′，西经118°02.68′）的冰芯深度为60米，C点（南纬80°00.85′，西经119°33.73′）的冰芯深度亦为60米。冰化学分析聚焦于南极大气沉积的主要离子组分，包括钠（Na，sodium）、铵（NH₄，ammonium）、钾（K，potassium）、镁（Mg，magnesium）、钙（Ca，calcium）、氯（Cl，chloride）、硝酸盐（NO₃，nitrate）与硫酸盐（SO₄，sulfate）。本次化学分析还涵盖了甲磺酸（methanesulfonic acid，MSA）与非海盐硫酸盐（nssSO₄，non-sea salt sulfate）。该数据集可通过文件传输协议（FTP，File Transfer Protocol）以ASCII文本格式及Excel文件格式对外提供。