基于中国黄土高原五个剖面的粒度数据集成的2.6Ma以来的粒度记录

从黄土高原南部和中部宝鸡，灵台，泾川，蒲县，平凉的5个黄土剖面共获得18, 352个样品，并测量这些样品的粒度分布，最后将五个剖面的粒度数据集成成一条随时间变化的曲线，并与深海氧同位素曲线相对比，发现在过去的1.8 Ma中，黄土-古土壤记录与海洋记录紧密相关。两个记录之间的气候事件也存在一些差异，这意味着区域强迫机制可能在中国黄土高原的气候演变中发挥了作用。

A total of 18,352 samples were collected from five loess sections at Baoji, Lingtai, Jingchuan, Puxian and Pingliang in the southern and central Chinese Loess Plateau. The grain size distributions of all samples were measured, and the grain size data from the five sections were integrated into a time-series curve, which was subsequently compared with the deep-sea oxygen isotope curve. The results show that over the past 1.8 Ma, the loess-paleosol records are closely correlated with the marine records. However, there are some discrepancies in climatic events between the two records, suggesting that regional forcing mechanisms may have played a role in the climatic evolution of the Chinese Loess Plateau.

搜集汇总

背景与挑战

背景概述

该数据集集成了中国黄土高原五个剖面的粒度数据，时间跨度为2.6Ma，包含18,352个样品的粒度分布测量。研究发现1.8 Ma以来黄土-古土壤记录与海洋记录紧密相关，但也存在差异，表明区域气候强迫机制在黄土高原气候演变中起重要作用。