项目名称: 青藏高原多年冻土空间分布动态变化研究
项目编号: No.41271086
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 天文学、地球科学
项目作者: 吴通华
作者单位: 中国科学院寒区旱区环境与工程研究所
项目金额: 85万元
中文摘要: 多年冻土空间分布动态变化研究一直是普通冻土研究领域的重要研究课题。研究表明,近年来青藏高原多年冻土已经发生了显著的变化,已有的高原多年冻土空间分布结果已经无法满足高原生态环境保护与寒区工程建设的需要。本研究拟充分利用青藏高原多年冻土监测网络的长期监测数据和区域分布调查资料,结合卫星遥感和实地野外调查,遴选适合青藏高原多年冻土分类特征的指标体系,进行多年冻土空间分布制图;将经验统计模型和物理数值模型相结合,模拟多年冻土空间分布的动态变化,利用野外调查获取的典型区多年冻土空间分布结果验证模拟结果,完善和发展适合青藏高原多年冻土空间分布变化的动态模型,并模拟预测其对不同气候变化情景的响应,为青藏高原的区域环境保护和重大工程的设计和维护提供科学的参考依据。此外,结合冻土研究的前沿,利用近来发展迅速的卫星重力资料探索性地研究青藏高原地球重力场变化与多年冻土变化的关系。
中文关键词: 多年冻土;空间分布;气候变化;冻融环境;青藏高原
英文摘要: The study on the spatial dynamics of permafrost is one of the most important topics in Geocryology. Recent researches indicated that permafrost has suffered significant degradation on the Qinghai-Tibet Plateau (QTP). The previous researching results on spatial dynamics of permafrost on the QTP could not satisfy the need of regional ecological conservation and increasing engineering construction on the plateau. This study aims to remapping the spatial distribution of permafrost on the QTP based on analyzing the long-term observations of permafrost for the established permafrost monitoring network and data about permafrost distribution in typical regions, combining in-situ field investigations with interpretation of remote sensing products, and selecting proper classification systems for permafrost on the QTP. It is also proposed to improve and develop a process-based empirical statistical model to simulate the spatial dynamics of permafrost on the QTP and to project the response of permafrost to different climatic change scenarios in the future. The research results will be counted on to providing scientific basis for regional natural conservation and design and maintenance of linear engineering on the QTP. In addition, the study also suggest to investigate the relationship between the variation of gravity field
英文关键词: Permafrost;Spatial distribution;Climate change;Freezing-thawing condition;the Qinghai-Tibet Plateau