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暴風湿気と上陸ハリケーン
https://doi.org/10.15102/1394.00001679
https://doi.org/10.15102/1394.0000167988d3990d-aa5c-469c-8427-b06ec067c1ae
名前 / ファイル | ライセンス | アクション |
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Full_Text (53.7 MB)
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Final_Exam_Abstract (42.9 kB)
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Item type | 学位論文 / Thesis or Dissertation(1) | |||||||
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公開日 | 2021-01-05 | |||||||
タイトル | ||||||||
言語 | ja | |||||||
タイトル | 暴風湿気と上陸ハリケーン | |||||||
タイトル | ||||||||
言語 | en | |||||||
タイトル | Storm moisture and landfalling hurricanes | |||||||
言語 | ||||||||
言語 | eng | |||||||
資源タイプ | ||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||
資源タイプ | doctoral thesis | |||||||
ID登録 | ||||||||
ID登録 | 10.15102/1394.00001679 | |||||||
ID登録タイプ | JaLC | |||||||
アクセス権 | ||||||||
アクセス権 | open access | |||||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
著者 (英) |
Li, Lin
× Li, Lin
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抄録 | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | When a hurricane strikes land, it can cause immense destruction to humans and other terrestrial life. Despite its importance, few studies have focused on the dynamics of hurricanes past landfall. By contrast, how hurricanes originate and grow over warm oceans has been extensively studied. Over oceans, moisture from the ocean fuels the intense winds of a hurricane heat engine. Past landfall, the hurricane is severed from this heat source, and its intensity decays. It is generally thought that this decay is a non-thermodynamic process that is dominated by the frictional drag with the land surface — crucially, moisture from the ocean plays no role in this process. Challenging this notion, we argue that the "storm moisture" — the stock of moisture which a hurricane carries as it strikes land — constitutes a source of heat that modulates the decay of intensity and shapes the internal structure of hurricanes past landfall. The critical, albeit unrecognized, role of storm moisture forms the leitmotif of this thesis, which consists of three parts. First, we analyze intensity data for North Atlantic landfalling hurricanes to show that the timescale of hurricane decay has increased in direct proportion to a contemporaneous rise in the sea-surface temperature over the past 50 years. Second, we show that a landfalling hurricane generates a cold-core in its eye that is distinct from the cold-core in an extratropical cyclone. Third, we show that as the cold-core grows past landfall, its competition with Ekman pumping restructures the secondary flow in the hurricane and can lead to the splitting of the hurricane. In all three cases, we show, using a blend of theory, computational simulations, and field observations, that storm moisture dictates the hurricane dynamics past landfall. | |||||||
言語 | en | |||||||
口頭試問日 | ||||||||
2020-11-11 | ||||||||
学位授与年月日 | ||||||||
学位授与年月日 | 2020-12-31 | |||||||
学位名 | ||||||||
学位名 | Doctor of Philosophy | |||||||
学位授与番号 | ||||||||
学位授与番号 | 甲第66号 | |||||||
学位授与機関 | ||||||||
学位授与機関識別子Scheme | kakenhi | |||||||
学位授与機関識別子 | 38005 | |||||||
学位授与機関名 | Okinawa Institute of Science and Technology Graduate University | |||||||
著者版フラグ | ||||||||
出版タイプ | VoR | |||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
権利 | ||||||||
権利情報 | © 2020 The Author. |