Although there are still some conflicts, previous studies based on lacustrine or aeolian deposits provide an overall understanding of the Holocene environment in the Qinghai Lake Basin. Compared to lacustrine deposits, aeolian sediments have received less attention, and the loess on the south coast and the Hudong Sandy Land on the east coast has received the most attention. The Ganzihe Sandy Land, the second largest sandy land in the Qinghai Lake Basin, is far from lakeshore areas and shows an obvious degradation trend. Very few reports have been published on the Ganzihe Sandy Land, especially regarding the Holocene environment. Here, we report a new and well-reserved aeolian sand-paleosol profile found in the Ganzihe Sandy Land. We used 7 optically stimulated luminescence (OSL) and accelerator mass spectrometry (AMS) ¹⁴C dating to establish the chronological framework and measured the magnetic susceptibility (MS), grain size, color parameters and total organic carbon (TOC) in the profile. Combined with lithologic changes and chronological data from published aeolian profiles, the results indicate that the aeolian activity in the Ganzihe Sandy Land during the Holocene was mainly affected by climate change in marginal monsoon areas by at least ~10 ka; the climate then improved, and vegetation began to develop from ~10 ka-~8 ka; from ~8 ka-~4 ka, the climate was warm/wet and stable, dunes were fixed and the sandy land entered the “Holocene climatic optimum”; since ~4 ka, the regional climate has gradually become drier and cooler, and aeolian sand has again accumulated on a large scale, particularly in the past thousand years. To prevent further environmental deterioration in the Ganzihe Sandy Land, we believe that straw-breaks should be established and increasing efforts should be made to artificially enclose the mobile dune region inside the sandy land, control the amount of animal husbandry and emphasize water conservation in the marginal areas. Further, sand control stations should be set up to carry out land monitoring and forecasting, and local residents should be educated about scientific and legal issues.

虽然仍存在一些矛盾，但以往基于湖相或风积沉积的研究提供了对青海湖流域全新世环境的整体认识。相较于湖相沉积，风积沉积受到的关注较少，以南海岸的黄土和东海岸的沪东沙地最为受关注。甘孜河沙地是青海湖流域第二大沙地，距湖岸区较远，退化趋势明显。关于甘孜河沙地的报道很少，特别是关于全新世环境的报道很少。在这里，我们报告了在甘孜河沙地发现的一个新的、保存完好的风沙-古土壤剖面。我们使用了 7 光学受激发光 (OSL) 和加速器质谱 (AMS) ¹⁴C 年代测定以建立年代框架并测量剖面中的磁化率 (MS)、晶粒尺寸、颜色参数和总有机碳 (TOC)。结合已发表风沙剖面的岩性变化和年代学数据，结果表明，甘孜河沙地全新世期间的风沙活动主要受边缘季风区气候变化的影响至少~10 ka；随后气候改善，植被从~10 ka-~8 ka开始发育；~8ka-~4ka，气候暖湿稳定，沙丘固定，沙地进入“全新世气候适宜期”；～4ka以来，区域气候逐渐变干变凉，风积沙再次大规模堆积，尤其是近千年来。为防止甘孜河沙地环境进一步恶化，我们认为应打断秸秆，加大沙地内流动沙丘区的人工围封力度，控制畜牧业数量，加强沙地水源保护。边缘地区。此外，应设立沙控站进行土地监测和预测，并对当地居民进行科学和法律问题的教育。