Little attention has been paid to climate change in the marginal regions of the Asian summer monsoon (ASM) domain since Marine Isotope Stage (MIS) 3 (60-27 cal kyr BP). Here, based on the mineralogy and grain size of a 24-m-long sediment core retrieved from Jilantai Salt Lake, we provide a paleolake evolution record from a marginal region of the ASM domain over the past 47 kyr. Our results indicate that the lake was a brackish or saline lake and that the region was relatively humid during 47–43 cal kyr BP. From 43 to 27.5 cal kyr BP, the lake salinity increased and the climate began to deteriorate. From 27.5 to 11.8 cal kyr BP, aeolian activity intensified and the climate was arid. From 11.8 to 5.6 cal kyr BP, the lake salinity continuously increased, and the climate was persistently arid. After 5.6 cal kyr BP, the lake salinity dramatically increased, the lake became a salt lake, and the climate was extremely arid. In general, the climate was semihumid in mid-late MIS 3, arid in MIS 2 (27–11.7 cal kyr BP), and hyperarid in the Holocene. This climate change pattern is apparently different from that in the regions influenced by the Asian monsoon and westerlies, indicating that the enhanced Asian monsoon or westerlies were not the main forcing mechanism driving climate change in the marginal regions of the ASM domain. Enhanced ice-albedo feedback caused by the expanded Northern Hemisphere ice volume during MIS 3 would have resulted in less net incoming solar radiation and relatively low temperatures in the mid-high-latitudes. The relatively low temperatures might have weakened the evaporation capacity of Jilantai Basin and increased south-north temperature gradients, resulting in an increase in local precipitation. Therefore, the climate was semihumid in mid-late MIS 3. The lowest Northern Hemisphere summer insolation (NHSI) combined with significantly increased ice-albedo feedback associated with the largest Northern Hemisphere ice volume would have led to a remarkable reduction in temperature, resulting in the reorganization of major atmospheric and hydrological systems in the Northern Hemisphere and an arid climate in MIS 2. Subsequently, the Northern Hemisphere ice volume nearly vanished, and the rising NHSI enhanced evaporation, thereby generating a hyperarid climate in the Holocene.

自海洋同位素阶段 (MIS) 3 (60-27 cal kyr BP) 以来，亚洲夏季风 (ASM) 域边缘地区的气候变化很少受到关注。在这里，基于从吉兰台盐湖取回的 24 米长沉积岩芯的矿物学和粒度，我们提供了过去 47 kyr 来自 ASM 域边缘区域的古湖泊演化记录。我们的结果表明，该湖是一个咸水或咸水湖，该地区在 47-43 cal kyr BP 期间相对潮湿。从 43 到 27.5 cal kyr BP，湖泊盐度增加，气候开始恶化。从 27.5 到 11.8 cal kyr BP，风沙活动加剧，气候干旱。从 11.8 到 5.6 cal kyr BP，湖泊盐度不断升高，气候持续干旱。在 5.6 cal kyr BP 之后，湖水盐分急剧增加，湖水变成盐湖，气候极其干旱。总体而言，MIS 3 中后期气候为半湿润气候，MIS 2 气候干旱（27-11.7 cal kyr BP），全新世极度干旱。这种气候变化模式与受亚洲季风和西风影响的地区明显不同，表明亚洲季风或西风增强并不是驱动ASM域边缘地区气候变化的主要强迫机制。MIS 3 期间北半球冰体积扩大引起的冰反照率反馈增强，将导致中高纬度地区的净入射太阳辐射减少和相对较低的温度。相对较低的气温可能削弱了吉兰台盆地的蒸发能力，增加了南北温度梯度，导致局部降水增加。因此，MIS 3 中后期的气候是半湿润的。 最低的北半球夏季日照 (NHSI) 加上与最大的北半球冰量相关的冰反照率反馈显着增加将导致温度显着降低，导致北半球主要大气和水文系统的重组和 MIS 2 的干旱气候。 随后，北半球冰量几乎消失，NHSI 上升增强了蒸发，从而在全新世产生了超干旱气候。