| 研究生: |
劉逸履 Liu, Yi-Lu |
|---|---|
| 論文名稱: |
藍色噴流與熱帶氣旋的關聯性 The relationships between blue jets and tropical cyclone system |
| 指導教授: |
許瑞榮
Hsu, Rue-Ron 陳炳志 Chen, Alfred Bing-Chih |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 物理學系 Department of Physics |
| 論文出版年: | 2018 |
| 畢業學年度: | 106 |
| 語文別: | 中文 |
| 論文頁數: | 98 |
| 中文關鍵詞: | 藍色噴流 、熱帶氣旋 、閃電 、危險半圓 、雨帶 |
| 外文關鍵詞: | blue jets, tropical cyclones, lightning, dangerous-semicircle, outer-rainband |
| 相關次數: | 點閱:96 下載:2 |
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由於在2008年的鳳凰颱風上觀測到發生在這個颱風系統當中主要是藍色噴流,在過去並沒有足夠的資料進一步可以分析藍色噴流與颱風系統的關聯性。ISUAL任務過去12年所累積高空短暫發光現象的資料已經達可分析的階段,而藍色噴流是所有高空短暫發光現象當中,唯一一個可以在短時間內連續發生的一個現象,於是欲透過這樣的特性觀察藍色噴流與過去發生的熱帶氣旋之關係。
本論文中,將2004年到2016年篩選出超過五千筆的藍色噴流事件,分析藍色噴流與熱帶氣旋的關係,其中的討論包含與何種熱帶氣旋種類有關、雨帶、與危險半圓的討論。另外藍色噴流與閃電的關聯性也是一個重要的研究方向,將分析其長時間累積圖、雨帶、與危險半圓的討論。
分析與統計結果為,藍色噴流與雨帶與閃電皆具有高度的相關性,另外,與颱風系統相關的比例為4%,與熱帶氣旋相關的有6.3%左右。而與危險半圓的分析約為50%左右。
The FORMOSAT-2 was launched successfully on May 21 2004, the Imager Sprites and Upper Atmospheric Lightning (ISUAL) was the only one scientific payload, and also the first mission devoted to the study of the transient luminous events. In recent years, a sufficient event was recorded for a further study, so that these events were used to analyze the relationships between tropical cyclones and lightning.
More than five thousand blue jets from 2004 to 2016 were selected in this study, and 700 km and a time window with ±3 hour conditions was set and the Naval Research Laboratory (NRL) global cloud maps were employed , to find the relationships between the blue jets and the features of the tropical cyclones, including their types, outer-rainband, dangerous-semicircle.
Also, the association between BJ and lightning is also an important issue in this study, World Wide Lightning Location Network (WWLLN) data were used and the cumulative histograms were analyzed to explore the outer-rainband, dangerous semicircle and their connection between blue jets and tropical cyclones.
The results are summarized as following:
(1) The BJs are strongly associated with the cloud-to-ground lightning and the rainband in the tropical cyclone.
(2) The percentage of BJs occurring in tropical cyclones is around 6.3%.
(3) The percentage of BJs located inside the dangerous-semicircle of the tropical cyclone is about 50%.
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