The periodicity and forcing mechanism of the past East Asian summer monsoon (EASM) precipitation are the natural background for predicting future precipitation changes, but they are controversial and intensely debated. Here, we present a high-resolution EASM precipitation record reconstructed from the loess redness in North China over the past 720 kyr. The average precipitation for interglacials is 420 mm/yr, higher than present (~280 mm/yr). Combing through our EASM records and previously published data exhibits a dominated periodicity of 100 kyr on the orbital timescale, and thus supports the hypothesis of high-latitude climate forcing. More importantly, we found the precession cycle appears only after the Mid-Brunhes Transition (MBT, ~430 ka) in the EASM records and it follows the global ice volume prior to the MBT in the interglacials interiors. We argue that during the post-MBT interglacials, abruptly appearing Arctic perennial sea ice resulted southward shift of the Northern Hemisphere Westerlies jet, thereby decreasing the EASM precipitation in North China. This suggests that the precession rhythm in the EASM possibly is a result of Arctic perennial sea ice or Northern Hemisphere ice sheets changes. In the warm Marine Isotope Stages (MIS) 5e and 11e, the strongest EASM precipitation may be related to the strengthening of the moisture transport from the warming tropical ocean. Therefore, the variation of the mid-latitude EASM precipitation intensity during the interglacial interiors is the integrated effect between the North Hemisphere high latitude ice volume and low latitude climate changes.

过去东亚夏季风（EASM）降水的周期性和强迫机制是预测未来降水变化的自然背景，但它们引起争议并引起了激烈的争论。在这里，我们提供了一个高分辨率的EASM降水记录，该记录是根据过去720年的华北黄土发红而重建的。间冰期的平均降水量为420毫米/年，高于目前（〜280毫米/年）。综合我们的EASM记录和先前发布的数据，在轨道时标上显示出100 kyr的主导周期性，因此支持了高纬度气候强迫的假设。更重要的是，我们发现岁差周期仅在中间过渡（MBT，在EASM记录中大约为430 ka），并且在冰间层内部之前，它遵循的是全球冰量，然后是MBT。我们认为，在MBT后冰期之间，北极常年出现的海冰突然出现导致北半球西风急流向南移动，从而减少了华北地区的EASM降水。这表明EASM中的进动节奏可能是北极多年生海冰或北半球冰盖变化的结果。在温暖的海洋同位素阶段（MIS）5e和11e中，最强的EASM降水可能与加强来自变暖的热带海洋的水分输送有关。因此，