The Aleutian Low (AL) is one of the major atmospheric systems that determines environmental conditions during winter in the North Pacific Ocean, with impacts that affect the climates of both Asia and North America from mid- to high latitudes. However, the multi-centennial and longer scale behavior of the AL during the Holocene is not fully understood. In this study, AL variability since 7.5 ka was examined by applying the principal component analysis technique to published δ18O data derived from sedimentary calcite, peat, ice, and speleothem from western North America. The extracted Principal Component 1 (PC1) represents a dramatic change from the mid- to late Holocene, and appears to reflect long-term intensified AL related to interactions between orbitally-driven southward shift of the Westerly Jet (WJ) over East Asia and the northwestern Pacific, and intensification of the El Niño–Southern Oscillation. In contrast, PC2 is characterized by multi-centennial to millennial-scale oscillations, with a spatial loading pattern that suggests PC2 reflects AL intensity and position shifts. These oscillations are contemporaneous with both WJ latitude and/or the meandering path shifts over East Asia and solar activity change, suggesting that a decrease/increase in solar irradiance is related to AL variability via interactions with the WJ.

阿留申低压 (AL) 是决定北太平洋冬季环境条件的主要大气系统之一，其影响会影响亚洲和北美从中纬度到高纬度地区的气候。然而，全新世期间 AL 的百年和更长时间的行为尚不完全清楚。在这项研究中，通过将主成分分析技术应用于已发表的 δ 18来检查自 7.5 ka 以来的 AL 变异性O 数据来自北美西部的沉积方解石、泥炭、冰和 speleothem。提取的主成分 1 (PC1) 代表了全新世中晚期的巨大变化，似乎反映了与西风急流 (WJ) 在东亚上空的轨道驱动南移与西北太平洋，厄尔尼诺-南方涛动加剧。相比之下，PC2 的特点是百年到千年尺度的振荡，其空间负载模式表明 PC2 反映了 AL 强度和位置变化。这些振荡与 WJ 纬度和/或东亚上空的蜿蜒路径变化和太阳活动变化同时发生，