The Impact of Coastal Boundaries and Small Hills on the Precipitation Distribution across Southern Connecticut and Long Island, New York
The Impact of Coastal Boundaries and Small Hills on the Precipitation Distribution across Southern Connecticut and Long Island, New York
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沿海边界和小山丘对康涅狄格州南部和纽约长岛降水分布的影响
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
S. Yuter
中科院分区：
文献类型：
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作者：
B. Colle;S. Yuter
摘要2004年12月1日，美国东北部的一个热带气旋对长岛（LI）、纽约和康涅狄格州南部（CT）沿海陆地地区的降水进行了修正，该气旋在900毫巴以下产生了强南风（15-30 m s-1），并在LI上空产生了强降水。LI（30-80米）和CT南部（100-250米）的海岸和丘陵的差异表面粗糙度增加了30%-50%的表面降水在这些地区相比，附近的水域LI声音。使用复合天气监视雷达-1988多普勒雷达数据插值到笛卡尔网格，这是一个4公里的模拟使用第五代宾夕法尼亚州立大学国家大气研究中心中尺度模式（MM 5）相比，显示的三维降水结构。由于低层的层结和低层的气流增加，MM 5在LI和CT上产生了一个地形强迫重力波，向上穿过6 km的MSL。前...
Abstract The modification of precipitation by the coastal land areas of Long Island (LI), New York, and southern Connecticut (CT) is examined for an extratropical cyclone over the northeast United States on 1 December 2004, which produced strong southerly flow (15–30 m s−1) below 900 mb and heavy precipitation over LI. The differential surface roughness at the coast and the hills of LI (30–80 m) and southern CT (100–250 m) enhanced the surface precipitation by 30%–50% over these regions compared with the nearby water region of LI Sound. The three-dimensional precipitation structures are shown using composite Weather Surveillance Radar-1988 Doppler radar data interpolated to a Cartesian grid, which is compared with a 4-km simulation using the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5). As the low-level stratification and flow increased at low levels, the MM5 produced a terrain-forced gravity wave over LI and CT upward through 6 km MSL. Prec...