Dendroclimatic Reconstruction for Western China Using Enhanced-Video Image Analysis

使用增强视频图像分析重建中国西部的树木气候

• 批准号: 9203944
• 负责人: Lisa Graumlich
• 金额: $ 19.38万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-01 至 1995-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9203944&HistoricalAwards=false
• 关键词: Dendroclimatic; Reconstruction; Western; China; Using

The region encompassing the Qinghai-Xizang (Tibetan) Plateau is of special importance in the study of global climatic variation because, as the largest and highest plateau in the world, Qinghai-Xizang strongly influences such large-scale climatic phenomena as the Asian monsoon. Our understanding of the climate of this area is severely constrained by lack of meteorological data predating 1950. This award supports a project designed to increase our understanding of the nature and causes of climatic variation in western China over the past thousand years. Tree-ring data from western china will be used to reconstruct temperature and precipitation variation. A significant component of the research effort will be the development of methods to measure climatically sensitive xylem characteristics (e.g., density, cell structure) using image- analysis techniques. The validity of the reconstructions will be assessed through comparisons with other proxy climatic data (e.g., historical records, isotopic variations in glacial ice). The reconstruction will be used to address (1) the nature of long-term temperature trends, (2) the temporal and spatial patterns of drought, and (3) the relationship between trends in temperature on the Tibetan Plateau and Asian monsoon.

由于缺乏1950年以前的气象资料，我们对这个地区气候的了解受到严重限制。该奖项支持一个旨在加深我们对中国西部过去一千年气候变化的性质和原因的认识的项目。中国西部的树木年轮数据将用于重建温度和降水的变化。研究工作的一个重要组成部分将是开发使用图像分析技术测量气候敏感木质部特征（例如，密度，细胞结构）的方法。重建的有效性将通过与其他代用气候数据（例如，历史记录、冰川冰的同位素变化）的比较来评估。