中国龙山时代（5．0～4．0kaBP）气候变化

CLIMATIC CHANGE DURING THE LONGSHAN PERIOD（5.0-4.0 kaBP）

龙山时代（5．0～4．okaBP）是全新世气候演化的一个重要阶段，也是中国古代社会演进的重要时期，然而有关这一时期的气候变化情况仍不太清楚；传统观点将整个龙山时代看作是一显著暖期，但近年来高分辨率的古气候纪录对这种认识提出了挑战。该文主要基于历史文献、考古证据以及近几十年来高分辨率的自然气候记录，运用IGBP强调古气候重建需要集成的方法，恢复了龙山时代气候变化；结果表明：龙山时代气候并非一直温暖，而是经历了龙山早期暖期（5．0～4．5kaBP）、龙山中晚期冷期（4．5～4．0kaBP）以及龙山未期降温事件（4．2～4．0kaBP）等3个气候阶段和气候事件；将其与世界其他地区古气候记录对比显示，这些特征气候阶段和气候事件影响范围较广，具有北半球性分布的特征。

The Longshan period（5.0-4.0 kaBP）is a key period for generation and development of the Chi- nese civilization. However, the climatic background of this period remains in dilemma. In this paper, based on historical documents, archaeological evidence, and high-resolution natural records reported dur- ing the past few decades, the climatic change during Longshan epoch was reconstructed following synthesis method recommended by IGBP. Our results indicate that the Longshang Epoch was not a uniform warm period as traditional researches suggested. It could be further divided into the early-middle Longshan WarmPeriod（5.0-4. 5 kaBP）, middle-late Longshan Cold Period（4. 5-4. 0 kaBP）,and a pronounced cooling event by the end of the Longshan period（4.2-4.0 kaBP）. The reconstructed climatic changes of the Longshan period are well correlated with the climatic records in the other parts of the world, indicating that it is at least a semi-sphere phenomenon.