In this paper,the impact of the Taiwan Island topography on the structure change and motion of Typhoon Dot(9017)during its crossing the Taiwan Island is studied with a modified version of a JMA operational regional mo...In this paper,the impact of the Taiwan Island topography on the structure change and motion of Typhoon Dot(9017)during its crossing the Taiwan Island is studied with a modified version of a JMA operational regional model(Japan spectral model,JSM).A series of sensitivity experiments are conducted to detect the forming and developing mechanism of an island-induced cyclone.Results show that lee side low pressure center plays a very important role in the formation of the induced-cyclone while a typhoon is approaching a large island with high mountains.The position and intensity of the induced cyclone is sensitive to the height and location of island mountain,intensity of TC and under- lying surface topography distribution as well.A preliminary formation criterion of the island-induced cyclone is obtained.展开更多
基于SRTM DEM 30m数据和ArcGIS软件,提取台湾岛的水系和流域盆地,计算得到台湾岛的地貌参数(坡度、地形起伏度和面积-高程积分(HI)值),并分析台湾岛水系分布对活动断裂的响应情况,得到以下结论:1)台湾岛河流受构造活动控制,以中央山脉...基于SRTM DEM 30m数据和ArcGIS软件,提取台湾岛的水系和流域盆地,计算得到台湾岛的地貌参数(坡度、地形起伏度和面积-高程积分(HI)值),并分析台湾岛水系分布对活动断裂的响应情况,得到以下结论:1)台湾岛河流受构造活动控制,以中央山脉为分水岭,西侧河流的南部水系为纵向流动,北部水系为横向流动,中央山脉以东的河流均为东西流向;2)台湾岛的HI值整体上呈现中间高、两边低的趋势,与海拔大体上呈正相关关系,沿逆冲断层边界,不同构造地质单元的HI值东西两侧差异明显;3)HI值可以反映台湾岛造山带的生成时序,流域盆地受构造抬升运动影响时间越长,HI值越大。展开更多
文摘In this paper,the impact of the Taiwan Island topography on the structure change and motion of Typhoon Dot(9017)during its crossing the Taiwan Island is studied with a modified version of a JMA operational regional model(Japan spectral model,JSM).A series of sensitivity experiments are conducted to detect the forming and developing mechanism of an island-induced cyclone.Results show that lee side low pressure center plays a very important role in the formation of the induced-cyclone while a typhoon is approaching a large island with high mountains.The position and intensity of the induced cyclone is sensitive to the height and location of island mountain,intensity of TC and under- lying surface topography distribution as well.A preliminary formation criterion of the island-induced cyclone is obtained.
文摘基于SRTM DEM 30m数据和ArcGIS软件,提取台湾岛的水系和流域盆地,计算得到台湾岛的地貌参数(坡度、地形起伏度和面积-高程积分(HI)值),并分析台湾岛水系分布对活动断裂的响应情况,得到以下结论:1)台湾岛河流受构造活动控制,以中央山脉为分水岭,西侧河流的南部水系为纵向流动,北部水系为横向流动,中央山脉以东的河流均为东西流向;2)台湾岛的HI值整体上呈现中间高、两边低的趋势,与海拔大体上呈正相关关系,沿逆冲断层边界,不同构造地质单元的HI值东西两侧差异明显;3)HI值可以反映台湾岛造山带的生成时序,流域盆地受构造抬升运动影响时间越长,HI值越大。
