[预告]06.11地遥学院学术交流沙龙第十期

　　时间： 2015年6月11日（星期四）上午10：00

　　地点： 地遥学院180会议室

　 　主办单位： 地遥学院

　　讲座内容：　

　　1. Relationships between Temperature Change and Grain Harvest Fluctuations in China from 210BC to 1910AD

　 　报告人： 苏筠  副教授

　　Abstract： The impact of climate change on agricultural production is integral to understanding the impacts of historical climate change on society and the economy, which could provide historical references for dealing with current and future global climate change. Continuous proxy series of human activity that extend to more than 1000 years in the past are few, especially for high-resolution series. There was a lack of quantitative records of grain harvest in Chinese history except during the Qing Dynasty. Thus, it is difficult to reconstruct long-term and high-resolution agricultural production series. In this paper, the method developed by Su et al. (2014) is used to reconstruct the grain grade sequence with a 10-year resolution from 210 BC to 1910 AD in China, and the changes between temperature and grain yield grades are compared. A positive correlation between the winter half-year temperature departure and the grain yield from 210 BC to 1910 AD in China was found. The change of grain yield grades could be divided into five stages. The bumper harvest stages corresponded to the warm periods, and poor harvest stages corresponded to the cold periods. In both warm and cold periods, the grain yield grades assumed a trend of convergence with the temperature increase. The sensitivity of grain yield to temperature change became weakened over time from 210 BC to 1910 AD, perhaps due to the strengthened adaptive capacity of agriculture to temperature change, with the extension of farming to southern China, progress of farming technology, and introduction of high-yielding crop varieties. Remote linkages between the agricultural change in China and the human civilization in Europe were found, implying the impacts of temperature change are globally synchronous.

　　2. Assessing the effectiveness of protecting reserves for nature assets in China

　　报告人： 蔚东英  讲师

　　Abstract： Evaluating the effectiveness of protecting nature assets is a vital component of responsive, pro-active management of protected areas. It is important to protect reserves of geological (including fossils) assets as a means to also protect national and natural heritage. At the end of 2013, 2669 protected areas had been established in China and 123 of them are reserves for nature assets. This paper builds an evaluation framework for protection effectiveness of these assets. The current elements and characteristics for effective protection are analyzed, along with an analysis of existing problems so as to construct a scientific approach to protect these assets. The influencing elements and characteristics for effective protection of nature asset reserves are included in an index evaluation system for effective protection in such areas, which contains four parts-target layer, evaluation criteria, evaluation indexes, and evaluation parameters-based on related documents and files. For the target layer, it includes nature asset evaluation and management evaluation. In the end, it is discussed how to build a comprehensive evaluation model and achieve an effective quantitative evaluation.