We reconstructed the Holocene climate in the study area using data from a BZ section in the Baiyangdian paleo-lake. Samples were analyzed for multiple proxies for climate conditions, including grain size, magnetic susceptibility (MS), and carbonate content, which were combined with accelerator mass spectrometry (AMS) ¹⁴C data. The results show that from 10.0 to 6.3 kyr BP, the study area experienced an interval of increasing precipitation and rising water level at Lake Baiyangdian. For a very short period, ~ 8.4 kyr BP, the extent of the lake reached the sampling point. The climate during this stage was relatively humid. The water level dropped abruptly at 6.5 kyr BP as a result of a weak monsoon event. From 6.3 to 2.9 kyr BP the climate became humid once again. The continuous lacustrine sediment of the strata indicated that the water level of Lake Baiyangdian expanded rapidly during this period and reached the sampling point. After 2.9 kyr BP, the climate in the region changed again from humid to dry. The abrupt increase in MS after ~1 kyr BP (993 AD) is consistent with records of human activities in local chronicles, which indicates that the environment in the study area was influenced by human activities. Through a comparison of the BZ section and the East Asian summer monsoon (EASM) records, we found that precipitation in the study area was controlled by the EASM. A series of cold Holocene events were clearly recorded by the sediment in the BZ section, and these events are synchronous with the North Atlantic ice-rafting events (IRD). The connection between the characteristics of the BZ section and the EASM and IRD indicate that climate evolution in the study area was strongly affected by EASM and IRD.

我们利用白洋淀古湖BZ剖面数据重建了研究区的全新世气候。分析了样品的多种气候条件指标，包括粒度、磁化率 (MS) 和碳酸盐含量，并结合加速器质谱 (AMS) ¹⁴C 数据。结果表明，在10.0～6.3 kyr BP期间，研究区白洋淀经历了降水增加和水位上升的区间。在很短的时间内，约 8.4 kyr BP，湖泊的范围达到了采样点。这一时期的气候相对湿润。由于弱季风事件，水位突然下降到 6.5 kyr BP。从 6.3 到 2.9 kyr BP，气候再次变得潮湿。地层连续的湖相沉积物表明，白洋淀湖水位在此期间迅速膨胀，达到采样点。2.9 kyr BP后，该地区的气候再次由潮湿转为干燥。大约 1 kyr BP（公元 993 年）后 MS 的突然增加与当地编年史中人类活动的记录一致，这表明研究区的环境受到人类活动的影响。通过BZ剖面与东亚夏季风（EASM）记录的对比，我们发现研究区的降水受EASM控制。BZ剖面的沉积物清楚地记录了一系列全新世寒冷事件，这些事件与北大西洋冰筏事件（IRD）同步。BZ剖面特征与EASM和IRD之间的联系表明研究区的气候演变受EASM和IRD的强烈影响。BZ剖面的沉积物清楚地记录了一系列全新世寒冷事件，这些事件与北大西洋冰筏事件（IRD）同步。BZ剖面特征与EASM和IRD之间的联系表明研究区的气候演变受EASM和IRD的强烈影响。BZ剖面的沉积物清楚地记录了一系列全新世寒冷事件，这些事件与北大西洋冰筏事件（IRD）同步。BZ剖面特征与EASM和IRD之间的联系表明研究区的气候演变受EASM和IRD的强烈影响。