自日本 311 事件發生以來，除著重境內核電廠之核安事故，各界格外注意境外汙染物的長程傳輸，因而中央氣象局自美國國家海洋及大氣管理局/大氣資源實驗室引進氣流軌跡整合HYSPLIT 模式，並結合NCEP GFS 模式之預報場資料，以期能對汙染物的傳輸及濃度分布能有即時的模擬預報。本文中將採用日本福島期間之汙染物觀測資料和其他研究中的模式模擬結果，與HYSPLIT 模式模擬結果進行比較。

Since the serious nuclear disaster occurred in Japan’s Fukushima, March 11, 2011, government, mass media, and the public in Taiwan pay much attention on not only the nuclear accident itself, but the radiation transferred from Fukushima or other country. Thus, to have a real time simulation in pollutants transportation and concentration, Central Weather Bureau is developing an international nuclear disaster impact assessment system by using Hybrid Single Particle Lagrangian Integrated Trajectory Model (HYSPLIT) from National Oceanic and Atmospheric Administration/Air Resources Laboratory (NOAA/ARL), combining with the forecasting data from National Center for Environmental Prediction (NCEP) Global Forecast System (GFS). In this study, the simulation results of HYSPLIT model are compared with the results from studies in Fukushima Daiichi nuclear disaster.