Development of a Prediction Method for Regional Scale Air Pollution - By Means of Numerical Simulation of Atmospheric Diffusion of Natural Radioactivity -

区域尺度空气污染预测方法的开发 - 通过自然放射性大气扩散的数值模拟 -

基本信息

批准号：
02302088
负责人：
IKEBE Yukimasa
金额：
$ 6.53万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

项目摘要

The purpose of the present research is the development of a numerical simulation model for long range transport of atmospheric pollutants including radioactive substances. A numerical simulation model has been constructed for naturally occurring radioactive rare gas, radon-222. A local-scale (80kmX80km) simulation model around Nagoya and a regional-scale one (4,000kmX4,000km) over eastern Asia compose the model. To compare calculational results with measurements, continuous measurements of atmospheric radon have been carried out at Nagoya, Kanazawa and Fukui. The results of calculation in each four season coincided fairly well with measured one at Nagoya. In the present work, we have also started to develop a dynamic model to simulate better the transport of radon.The present regional-scale model has been applied to the simulation of long-range transport of tritium in water vapor over eastern Asia. The transport of tritium was calculated for about two weeks in November, 1978, when the tritium concentration in Japan was much higher than the low level at present and there are abundant literature of environmental tritium in China. The calculated results agreed within the factor of two with the observed one. Thus the present research have provided a preliminary stage simulation model for long range transport of tritium, but there are many problems to be solved in the future.

本研究的目的是开发用于大气污染物（包括放射性物质）远程运输的数值模拟模型。已经为天然存在的放射性稀有气体RADON-222构建了数值模拟模型。 Nagoya周围的局部尺度（80kmx80km）模拟模型，在东亚的区域尺度尺寸（4,000kmx4,000km）组成了该模型。为了将计算结果与测量结果进行比较，在Nagoya，Kanazawa和Fukui进行了大气ra的连续测量。每个四个季节的计算结果与纳戈亚的测量结果相当好。在目前的工作中，我们还开始开发一个动态模型，以更好地模拟ra的运输。当前的区域尺度模型已应用于在东亚水蒸气中水蒸气中trip的远程转运的模拟。 1978年11月，trium的运输计算了大约两周，当时日本的triumitium浓度远高于目前的低水平，并且中国有大量的环境文献。计算出的结果在两个因素之内达成了观察到的结果。因此，本研究为Tritium的远距离运输提供了初步的阶段模拟模型，但是将来有许多问题要解决。