Glacial isotopic composition from Dome Summit South, 2016-2017 season, A sample

These data were collected from the drilling site at Dome Summit South (DSS) on Law Dome in East Antarctica. The DSS site is on Law Dome, a prominent ice dome located about 120 km from Casey Station. The site receives a high rate of snow accumulation which helps create a very detailed climate record.The DSS1617_Glacial_isotopic_composition is the measured oxygen and deuterium isotopic data for the ‘DSS’ (Dome Summit South) ice core (DSS1617) collected during the Antarctic 16/17 season. The glacial isotopic composition was measured on melted ice samples using a Picarro water isotope analyser (L2130-i). A key output for this project will be the time series of water isotopes (d18O and dD), which provides a temperature proxy record. In addition, deuterium excess can be computed, to explore moisture source conditions, including its applicability as a source temperature. In addition, the time series of water isotopes (d18O and dD) will also contribute to the multi proxy approach for the chronological control of the recently collected DSS ice cores.

本数据集采集自东南极洲劳冰盖（Law Dome）的南穹顶钻井点（Dome Summit South，简称DSS）。该钻井点坐落于劳冰盖——一处距离凯西站（Casey Station）约120公里的大型冰穹——之上。区域降雪积累速率较高，为构建高分辨率气候记录序列提供了有利条件。本数据集DSS1617_冰川同位素组成（DSS1617_Glacial_isotopic_composition）对应南极16/17科考季采集的DSS（南穹顶）冰芯（DSS1617）的实测氧与氘同位素数据。本次检测采用Picarro水同位素分析仪（L2130-i）对融冰样品进行分析，获取冰川同位素组成数据。本项目核心产出之一为水同位素（δ¹⁸O与δD）时间序列，该序列可作为温度代用指标记录。此外，可通过计算得到氘盈余值，用于探究水汽源区条件，包括其作为源区温度代用指标的适用性。同时，该水同位素时间序列还可助力构建多代用指标体系，为新近采集的DSS冰芯提供年代学约束。