The roles of vertical wind shear and topography in formation of convective asymmetries in Typhoon Nanmadol (2011)

文化大學機構典藏 CCUR > 理工學院 > 理學院 > 大氣系所 > 期刊論文 > Item 987654321/44632

請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/44632

題名:	The roles of vertical wind shear and topography in formation of convective asymmetries in Typhoon Nanmadol (2011)
作者:	Chou, KH (Chou, Kun-Hsuan) Yeh, CM (Yeh, Chun-Ming) Lin, SJ (Lin, Shu-Jeng)
貢獻者:	大氣系
關鍵詞:	TROPICAL CYCLONE INTENSITY BOUNDARY-LAYER IDEALIZED SIMULATIONS PART I EYEWALL EVOLUTION TAIWAN OROGRAPHY TRACK MODEL IMPACT MOTION
日期:	2019-04
上傳時間:	2019-06-25 11:36:10 (UTC+8)
摘要:	he effects of terrain and environmental vertical wind shear on the intensity, structure, and asymmetric convection of Typhoon Nanmadol (2011) were investigated using a high-resolution numerical model. Terrain-removed sensitivity experiments were conducted to elucidate the relative role of terrain in the formation of the storm's asymmetric convection. Several sensitivity experiments were also employed to examine whether convective asymmetry formed in the simulated storm was influenced by model physics or existence of Typhoon Talas (2011). The control experiment shows that the simulations of the overall track and intensity evolution and asymmetric convection of Nanmadol were reasonably close to observations. Storm-relative composited analyses prove that environmental vertical wind shear enhances the storm's secondary circulation (low-level inflow, upward motion, and upper-level outflow) over the downshear side, but suppresses secondary circulation over the upshear side, thus inducing asymmetric secondary circulation within the storm, the dynamical pattern of which can be explained by the superposition effect of environmental vertical wind shear. The results of sensitivity experiments indicate that the underlying terrain, the model physics, and the circulation of the Talas didn't exert any obvious influence on the asymmetric convection and secondary circulation of the simulated storm. Therefore, the results presented here not only indicate that environmental vertical wind shear played a dominant role in forming the asymmetric convective pattern of Nanmadol, but also demonstrate that the proposed shear-induced dynamic pattern of the asymmetric secondary circulation is robust.
關聯:	Terr. Atmos. Ocean. Sci., Vol. 30, No. 2, 185-214, April 2019
顯示於類別:	[大氣系所] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	165	檢視/開啟

檢視Licence

在CCUR中所有的資料項目都受到原著作權保護.

資料載入中.....