2009-04-162024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/656031摘要：本團隊2008年針對雪霸國家公園觀霧地區水平降水(霧)量、滯留時間與季節變化，進行定量觀測調查初探；我們已分析過去20年(1987~2007)中央氣象局觀霧遙測氣象站之盛行風場資料，做為攔截水平降水(霧）方位的設定，以及日照時數日夜變化之特徵曲線；同時，本團隊所設計的「雲霧偵測攔截整合裝置」(Fog Detection and Interception Device，FDID)是由三款雲霧偵測器和兩款雲霧攔截器，以及透過數位相機定時自動拍攝等方法所構成，已建立雲霧影像辨識與霧水量蒐集相互驗證的觀測策略與經驗。上年度觀測資料綜合分析顯示，夏季霧事件好發於午後，秋冬季節則集中於早上與上午，濃霧事件多集中在午後發生。觀霧地區因雲霧所帶來所謂的水平降水量，僅以「有霧無雨」的天氣條件來估計，約是垂直降水量的9.3%。若一併考慮「有雨有霧」之天氣條件，則觀霧地區水平降水量估計可達垂直降水量的37%。本研究將修正FDID過去一年在觀霧地區雲霧觀測策略，捨去NTU Light Fog Detector (NLFD)設備，保持NTU Resistance Fog Dectector (NRFD)以及NSFC和NCFC二款雲霧攔截器，增強數位相機定時自動拍攝功能與影像分析方法，蒐集對應的天氣圖資訊，以完成全年各季節的水平降雨(霧)觀測調查並確立監測模式，做為未來環境教育解說及相關科學研究之背景參考。<br> Abstract: The study extends our fog research at Kuanwu recreation area in Shei-Pa National Park from June of 2008 until March of 2009. In the past year, the preliminary results on the fog happening, fog density, equivalent water record and the frequency of fog had been archived. The 20-year record length of local meteorological data at Kuanwu has been analyzed well to build up the background of atmospheric environment, and to estimate the ratio between the cloud-fog amount (or called horizontal precipitation) and the rainfall amount. Through our FDID (Fog Detection and Interception Device) system, we found that the fog events appear in summer-time afternoon highly, but they shift to the morning and noon times in autumn and winter seasons. The severe fog event always happens in the afternoon. The Type B (fog day with no rain) weather has about 9.3% compared to the annual rainfall amount. Type D (rainy day with fog) weather has 3 times of fog amount to type B. The amount of horizontal precipitation (cloud-fog) at Kuanwu is about 37% of annual rainfall. In the coming seasons, the best performance of FDID system will be turned, including the function updated on digital camera and image processing. The fog time-evolution with the weather information through whole-year at Kuanwu will be archived and analyzed more in this proposal. We believe that the methodology and measuring results could play the reference for ecosystem investigation and education.雲霧水平降水生態系調查cloud-foghorizontal precipitationecosystem investigation