Collaborative Research: Late Quaternary Climates of Northeastern Asia: Temporal and Spatial Varibility

[摘要] ATM-9820620胡凤生，美国伊利诺州香槟大学，题目：东北亚晚第四纪气候：时间和空间变化该奖项支持一个旨在通过记录东北亚过去18,000年放射性碳年气候的空间和时间变化来提高对东亚晚第四纪气候系统的理解的项目，描述可能的千年和百年尺度的机制，可以解释所观察到的古气候变化，并比较结果从东北亚到其他地区（例如，亚洲东南部、北美洲西北部、北大西洋），以便对区域气候系统的相互关系有一个更全面的认识。 总体研究目标将通过以下方式实现：1）通过收集和分析保存在湖泊沉积物中的现代和古代植物学、地球化学和硅藻数据来重建过去的气候; 2）使用改进的放射性碳技术开发高质量的年表; 3）检查现代天气气候模式、大气环流模式模拟和概念框架，以确定气候变化的可能原因; 4）比较基于代用指标和基于模式的古气候解释，以评估观测到的气候历史背后最可能的机制; 5）探索与米兰科维奇和次米兰科维奇尺度事件相关的可能的半球尺度联系。

AbstractATM-9820620Hu, Feng S.University of Illinois-ChampaignTitle: Late Quaternary Climate of Northeast Asia: Temporal and Spatial VariabilityThis award supports a project designed to improve the understanding of late Quaternary climatic systems of East Asia by documenting spatial and temporal variations in climates of the last 18,000 radiocarbon years for NE Asia, describing probable millennial and centennial scale mechanisms that can account for the observed paleoclimatic changes, and comparing results from NE Asia to other regions (e.g., SE Asia, NW North America, North Atlantic) to obtain a more holistic view of the inter-relationships of regional climatic systems. Overall research goals will be accomplished by: 1) reconstructing past climates through the collection and analysis of modern and ancient botanical, geochemical, and diatom data preserved in lake sediments; 2) developing high quality chronologies using improved radiocarbon techniques; 3) examining modern synoptic climatic patterns, general circulation model simulations, and conceptual frameworks to identify possible causes of climatic change; 4) comparing the proxy- and model-based paleoclimatic interpretations to assess the most likely mechanisms behind the observed climatic histories; and 5) exploring possible hemispheric scale linkages associated with Milankovitch and subMilankovitch scale event.