Roosevelt Island Climate Evolution (RICE) ice core: The RICE17 chronology and accumulation record for the past 2700 years

A 2700-year annual timescale and accumulation history for the RICE (Roosevelt Island Climate Evolution) ice core from Roosevelt Island, Ross Sea region, West Antarctica.

The timescale was constructed by a combination of manual and automated annual-layer counting, and subsequently validated by volcanic and methane matching to the WAIS Divide ice core on the WD2014 chronology. It constitutes the top part of the Roosevelt Island Ice Core Chronology 2017, RICE17.

Past annual accumulation rates were obtained from the annual layer thicknesses, after correction for firn densification and layer thinning due to ice flow. The uncertainty of past accumulation rates was estimated based on the uncertainty in ice flow thinning with depth.

针对西南极罗斯海区域罗斯福岛的RICE（罗斯福岛气候演化，Roosevelt Island Climate Evolution）冰芯，构建了一条时长2700年的年际时间标尺与积累历史序列。

该时间标尺通过人工与自动化年层计数相结合的方式构建，随后以WD2014年表为基准，通过与WAIS Divide冰芯的火山信号及甲烷数据匹配完成验证。本序列属于2017版罗斯福岛冰芯年表（RICE17）的顶部组成部分。

基于年层厚度，经粒雪压实作用与冰流导致的层厚减薄校正后，得到历史时期的年积累速率。年积累速率的不确定性则基于冰流随深度引发的层厚减薄的不确定性进行估算。

搜集汇总

背景与挑战

背景概述

该数据集提供了Roosevelt Island冰芯过去2700年的年度时间尺度和积累历史记录，包括冰芯深度、年龄、年层厚度、雪积累量等参数。这些数据通过手动和自动年层计数结合火山和甲烷匹配验证，用于研究南极洲罗斯海地区的气候演变。