论文部分内容阅读
树木生长除了长期固定的地理位置使其有适宜的气候条件外,而且又直接受着当地自然环境(大气,水和土壤)变化的影响。环境中各种污染物质每年都是以各种形式组成有机质或沉积于体内,形成了以年轮式结合于树干整体,每个年轮象“日记”一样显现出当年的环境因素的特点。目前世界上各国都利用树木年轮变化可研究测算出历史上各年的气候变化,污染状况;考古学家还利用树木年轮进行“考古”,可推知更远的地质变化。当前利用树木年轮监测环境污染查明历史上的环境质量状况引起了各国重视,美国学者用此法分析出某军
In addition to its long-term fixed geographical location, suitable for its climatic conditions, tree growth is directly affected by changes in the local natural environment (atmosphere, water and soil). Various pollutants in the environment each year in various forms of organic matter or deposited in the body, forming a combination of annual rings combined with the trunk, each annulus as “diary” shows the characteristics of the year’s environmental factors. At present, all countries in the world can make use of the change of tree-ring to study and calculate the climate change and pollution status in each year in history. Archeologists also make use of tree rings for archeology to infer further geological changes. The current use of tree rings to monitor environmental pollution to identify the history of environmental quality caused by the attention of all countries, the United States scholars use this method to analyze a certain army