基于古气候数据同化研制的过去千年三极降水场数据集

（1）数据内容：过去千年三极（北极、南极、青藏高原）降水场数据集（precipitation anomaly based on the millinnial mean）；（2）数据来源及加工方法：该数据由作者自主生产，通过古气候数据同化方法同化三极地区降水代用资料而生产；（3）数据质量描述：该数据集和多个器测的降水数据集之间具有高度的时空一致性（相关系数在0.35以上，p<0.001; 纳什效率系数在0.3以上）。此外，和多个基于代用资料重建的降水数据序列之间的相关系数在0.2-0.6之间（p<0.001）；（4）可用于三极地区过去千年降水时空变化研究。

1. Data Content: A millennial-scale precipitation field dataset for the Three Poles (Arctic, Antarctic, and Qinghai-Tibet Plateau), with precipitation anomalies calculated based on the millennial mean. 2. Data Source and Processing Method: This dataset was independently developed by the authors, which was produced by assimilating precipitation proxy records from the Three Poles region using paleoclimate data assimilation. 3. Data Quality Description: This dataset exhibits high spatio-temporal consistency with multiple instrumental precipitation datasets, with correlation coefficients greater than 0.35 (p<0.001) and Nash-Sutcliffe efficiency coefficients above 0.3. Additionally, the correlation coefficients between this dataset and multiple precipitation reconstruction sequences derived from proxy records range from 0.2 to 0.6 (p<0.001). 4. Application Scope: This dataset can be applied to studies on spatio-temporal variations of precipitation over the past millennium in the Three Poles region.

搜集汇总

背景与挑战

背景概述

该数据集是基于古气候数据同化方法研制的过去千年（1000-2000年）三极（北极、南极、青藏高原）降水异常场数据，时间分辨率为年，空间分辨率为1º-10º。数据质量较高，与器测和代用资料重建的降水数据具有显著相关性，适用于研究三极地区降水时空变化。