臺灣地區蒸發導管之特性研究; The research of evaporation duct in Taiwan

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/5194

Title:	臺灣地區蒸發導管之特性研究;The research of evaporation duct in Taiwan
Authors:	蔡世樵;Shih-Chiao Tsai
Contributors:	太空科學研究所
Keywords:	太空科學;蒸發導管特性研究;evaporation duct;space science
Date:	2004-06-03
Issue Date:	2009-09-22 09:46:53 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	本篇論文利用台灣地區東港和板橋探空站的探空資料，來做大氣導管特性統計分析，並比較南北地區導管特性的差異以及在不同月、季的變化情形。同時，藉由兩測站之探空資料計算出的大氣折射率隨高度的分佈，對CHAMP衛星資料做驗證，討論電波掩星法所反演的大氣折射率特性以及是否適合用來做大氣導管的分析。統計的結果顯示電波掩星法所反演的大氣折射率，無法反映出在低層大氣中折射指數不規則擾動的現象，且無法用來做大氣導管的分析。另外，也利用實際海上探空資料，來對EREPS中的蒸發導管模式以及有關電磁波的射線軌跡、涵蓋範圍的模擬做校驗，分析EREPS用於台灣地區蒸發導管預測的準確性。校驗的結果顯示，當空氣溫度大於海水溫度時，其預測的蒸發導管高度會偏高，且當實際上有蒸發導管發生時，其預測的準確性較高。 In this paper, the radiosonde data taken by Dong-Gang and Pan-Chiao rawinsonde station are analyzed to obtain tha statistic properties of atmosphere duct. It also shows the variation of duct's properties between south and north area in Taiwan during different month and season. Moreover, the N-Profile calculated from these radiosonde data are used to compare to CHAMP satellite data, and discuss the peoperties of N-Profile which obtained from GPS radio occultation techinique and can be analyzed to obtain the properties of atmosphere duct or not. Statistic results show that the N-Profile which obtained from GPS radio occultation techinique can not express the anomalous distribution of the surface atmospheric refractive index, and can not be analyzed to obtain the properties of atmosphere duct. Besides, the radiosonde data taken in sea are used to certificate EREPS's evaporation model and the simulation of ray locus and coverage diagram, to analyze the accuracy of EREPS model. It shows that when air temperature larger than sea temperature, the EREPS model yields high evaporation duct heights, and when there is no evaporation duct exists, the simulation will be more correct.
Appears in Collections:	[Graduate Institute of Space Science] Department of Earth Sciences

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