Rapid North Atlantic cooling events during the last deglaciation caused atmospheric reorganizations on global and regional scales. Their impact on Asian climate has been investigated for monsoonal domains, but remains largely unknown in westerly wind-dominated semiarid regions. Here we generate a dust record from southeastern Iran spanning the period 19 to 7 cal. ka B.P. We find a direct link between frequent occurrences of dust plumes originating from the Arabian Peninsula and North Africa and rapid southward shifts of the westerlies associated with changes of the winter stationary waves during Heinrich Stadial 1, the Younger Dryas, the Preboreal Oscillation, and the 8.2-ka event. Dust input rises and falls abruptly at the transitions into and out of these cooling events, which we attribute to changes in the ocean circulation strength that are modulated by the North Atlantic winter sea-ice cover. Our findings reveal that waxing and waning of North American ice sheets have a stronger influence than those of European ice sheets on the winter climate over West Asia.

最后一次冰消期间北大西洋的迅速降温事件导致全球和区域尺度的大气重组。已经对季风域对它们对亚洲气候的影响进行了调查，但在以风为主导的半干旱地区仍是未知之数。在这里，我们从伊朗东南部生成了一个跨度为19到7 cal的尘埃记录。ka BP我们发现，频繁出现的阿拉伯半岛和北非尘埃羽流与海因氏快速向南移动之间的直接联系，海平面与海因里希第1阶段，较年轻的树状干，先天体振荡和8.2-ka事件。在进入和离开这些冷却事件的过程中，粉尘输入突然上升和下降，我们将其归因于北大西洋冬季海冰覆盖所调节的海洋环流强度变化。我们的发现表明，北美冰盖的起蜡和减弱对欧洲冬季冰盖的影响比欧洲冰盖的影响更大。