中文摘要：

中世纪暖期是2000年来全球最重要的气候事件之一，关于中世纪暖期的研究，主要是通过各种代用资料重建气候序列。从目前的研究来看，能敏感响应环境变化的高分辨率的信息载体主要有冰芯、树轮、历史文献、湖泊沉积及石笋等。随着代用资料的开发，对于中世纪暖期的研究已经取得了丰硕的成果，但在中世纪暖期是否具有全球性，不同区域的起讫时间、增温幅度、内部波动以及成因机制等问题上还存在一定争议。主要原因是受重建资料敏感性与地域性限制，加上不同代用指标对气候变化敏感性的差异以及不同代用资料的方法、气候与环境意义等存在差异，定年存在误差。在中国，从对重建资料的整理分析来看，对于“中国是否存在中世纪暖期”这个问题，各研究者们没有达成一致的看法；对于中国中世纪暖期冷暖变化的研究，由于区域差异，东部重建资料以历史文献为主，而西部关于历史气候环境的相关记载很少，所以重建资料以冰芯、湖芯、树轮等为主。大多数的研究结果认为，西部的冷暖变化与东部有着明显的差异，其中最主要的是东部在900～1300A．D，存在明显的温暖期，而西部则暖期不如东部明显。今后为了更加全面深入的了解中世纪暖期气候特征，应加强各种代用指标高分辨率序列的积累和定量化研究、各种代用指标和重建序列的综合集成研究及其与吉气候模拟结果的比较研究，以期从动力学角度加深理解中世纪暖期的区域响应差异。

英文摘要：

The Medieval Warm Period （MWP） is one of the most important climate events happened in the last two millennia. The research work has been carried out mainly by using various proxy records to reconstruct climate. Now the high-resolution proxy records that can reveal environment change are ice core, tree-ring, historical documents, lake sediment and stalagmite, etc. With the development of proxy data, many achievements have been obtained on the MWP climate reconstruction. However, some questions, such as whether the MWP is a global phenomenon, what are the temperature anomalies and the climatic characteristics in the MWP, what are the causes of the MWP, and so on, still have some arguments because of the regional restriction of the reconstructed datasets, different sensitivities of proxies to climate change and different climatic and environmental significances. Moreover, there are errors in dating of reconstruction. In China, based on the results of analyzing reconstruction data, we find the opinions of researchers on ＂is there MWP in china？＂ are not consistent. And on the question of the changes of temperature in the MWP, we find the proxy records in the eastern China mainly are historical documents, while the proxy records in the western China mainly are ice core, tree-ring, etc. , because of the absence of records on historical climate records in the western China. Most researchers agree that there are distinct differences of temperature change between the eastern and western China. The most importance is that there was a distinct warm period in the eastern China during 900 - 1300AD, and the warm record in the western China was not obvious in same episode. For the future, in order to fully understand the characteristic of the MWP climate from viewpoint of dynamics, we should strengthen the research on accumulation and ration of high-resolution proxy records, integration of various proxy records and reconstruction sequences, and comparison study between paleoclimate simulation and reconstructed results