Low-Level Jets, Orographic Effects, and Extreme Events in Nares Strait: A Model-Based Mesoscale Climatology
Low-Level Jets, Orographic Effects, and Extreme Events in Nares Strait: A Model-Based Mesoscale Climatology
复制标题
内雷斯海峡的低空急流、地形效应和极端事件：基于模型的中尺度气候学
DOI：
10.1175/2007mwr2326.1
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发表时间：
2008
影响因子：
3.2
通讯作者：
P. Barbour
中科院分区：
文献类型：
--
作者：
R. Samelson;P. Barbour
摘要利用嵌套在全球数值天气预报业务场中的中尺度大气模式，对2003年8月至2005年7月的2年期间，通过埃尔斯米尔岛和格陵兰岛之间的内尔斯海峡的低空风场和地面风应力进行了估算。在一年中的大部分时间里，模式的低空风主要由强烈的向南沿海峡气流主导，冬季月平均向南10米风速达到10米秒−1。夏季气流弱，每小时沿海峡风分布在2年期间强烈双峰。强烈的向南低层风与从林肯海到巴芬湾的压力梯度下的非地转、地形通道流相关联，并且与沿着纳雷斯海峡的压力差高度相关。月平均10米风和风应力的2年平均值和领先的EOF将最强的风和应力放在史密斯湾和肯尼迪海峡的南部，在巴芬湾和凯恩盆地的开口处，在...
Abstract A mesoscale atmospheric model, nested in operational global numerical weather prediction fields, is used to estimate low-level winds and surface wind stress through Nares Strait, between Ellesmere Island and Greenland, during 2 yr from August 2003 to July 2005. During most of the year, the model low-level winds are dominated by intense, southward along-strait flow, with monthly-mean southward 10-m winds reaching 10 m s−1 in winter. Summertime flow is weak and distributions of hourly along-strait winds during the 2-yr period are strongly bimodal. The strong southward low-level winds are associated with ageostrophic, orographically channeled flow down the pressure gradient from the Lincoln Sea to Baffin Bay and are highly correlated with the pressure difference along Nares Strait. The 2-yr means and leading EOFs of monthly-mean 10-m winds and wind stress place the strongest winds and stress in the southern parts of Smith Sound and of Kennedy Channel, at the openings to Baffin Bay and Kane Basin, at...