East Asian Summer Monsoon (EASM) and Winter Monsoon (EAWM) proxy stacks

This data set presents East Asian summer monsoon (EASM) and winter monsoon (EAWM) proxy record stacks for the last 10,000 years. Shown is the median value (X50) as well as its 1-sigma (X16; X84) and 2-sigma (X2.5;X97.5) uncertainty envelope. For the development of the stacks, we combined marine and terrestrial (non-speleothem) proxy records from the East Asian realm. Please see the supplementary information of Kaboth et al. (2021) for further details on the individual proxy records used. The individual EASM and EAWM records were linear resampled (0.1 kyr step size) and detrended before applying a low pass Taner filter with a cut-off frequency of 2 and a roll-off-rate of 10^10^. These steps were implemented to adjust for the differences in sample resolution and account for respective age uncertainties between the different proxy records, as well as remove the long-term insolation trend inherent to the selected records. The stacking was realized with an iteration loop with N=1000 iterations. For this we used the astrochron package implemented in the software R. Please see the method section in Kaboth-Bahr et al. (2021) for more details on the applied stacking algorithm.

本数据集呈现了过去10000年的东亚夏季风（East Asian Summer Monsoon, EASM）与东亚冬季风（East Asian Winter Monsoon, EAWM）代用记录堆叠序列。本次展示内容包含中位数（X50），以及其1倍标准差（X16、X84）和2倍标准差（X2.5、X97.5）不确定度包络线。在构建该堆叠序列时，我们整合了东亚区域内的海洋与陆地（非洞穴成因）代用记录。有关所用单条代用记录的详细信息，请参阅Kaboth等人（2021）的补充材料。在对各条EASM与EAWM代用记录以0.1千年（kyr）为步长进行线性重采样并去趋势后，我们使用截止频率为2、滚降率为10¹⁰的低通Taner滤波器进行处理。上述步骤旨在校正不同代用记录间的采样分辨率差异，抵消各自的年代学不确定性，并移除所选记录固有的长期日照辐射趋势。该堆叠序列的构建通过迭代循环完成，迭代次数N=1000。本流程使用R软件中的astrochron软件包实现。有关所采用堆叠算法的更多细节，请参阅Kaboth-Bahr等人（2021）的方法部分。