Synchronization of the NGRIP, GRIP, and GISP2 ice cores

We here present a synchronization of the NGRIP, GRIP, and GISP2 ice cores based mainly on volcanic events over the period 14.9-32.45 ka b2k (before AD 2000), corresponding to Marine Isotope Stage 2 (MIS 2) and the end of MIS 3. The matching provides a basis for applying the recent NGRIP-based Greenland Ice Core Chronology 2005 (GICC05) time scale to the GRIP and GISP2 ice cores, thereby making it possible to compare the synchronized palaeoclimate profiles of the cores in detail and to identify relative accumulation differences between the cores. Based on the matching, a period of anomalous high accumulation rates in the GISP2 ice core is detected within the period 16.5-18.3 ka b2k. The d18O and [Ca2+] profiles of the three cores are presented on the common GICC05 time scale and generally show excellent agreement across the stadial-interstadial transitions and across the two characteristic dust events in Greenland Stadial 3. […]

本报告呈现了NGRIP、GRIP与GISP2冰芯的同步研究，主要依据14.9-32.45千年前（公元前2000年之前）的火山事件，对应于海洋同位素阶段2（MIS 2）及MIS 3的终结时期。此次匹配为将基于NGRIP的大绿洲冰芯年代学2005（GICC05）时间尺度应用于GRIP与GISP2冰芯提供了基础，从而使得详细比较冰芯的同步古气候剖面成为可能，并识别出冰芯之间的相对积累差异。基于此匹配，GISP2冰芯在16.5-18.3千年前（公元前2000年之前）期间检测到异常高积累率。三个冰芯的d18O和[Ca2+]剖面均展示在共同的GICC05时间尺度上，并在冰期-间冰期过渡及格陵兰冰期3的两个典型粉尘事件中表现出优异的一致性。

搜集汇总

背景与挑战

背景概述

该数据集通过火山事件同步了NGRIP、GRIP和GISP2冰芯，时间跨度为14.9-32.45 ka b2k，并应用GICC05时间尺度进行比较分析。研究发现GISP2冰芯在16.5-18.3 ka b2k期间存在异常高积累率，且该时期三个冰芯的d18O和[Ca2+]剖面差异显著，可能与大气环流变化有关。