Influences of the Kuroshio/Oyashio Extensions on Air-Sea Heat Exchanges and Storm-Track Activity as Revealed in Regional Atmospheric Model Simulations for the 2003/04 Cold Season*
Influences of the Kuroshio/Oyashio Extensions on Air-Sea Heat Exchanges and Storm-Track Activity as Revealed in Regional Atmospheric Model Simulations for the 2003/04 Cold Season*
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DOI：
10.1175/2009jcli2910.1
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发表时间：
2009-12
影响因子：
4.9
通讯作者：
B. Taguchi;H. Nakamura;M. Nonaka;S. Xie
中科院分区：
文献类型：
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作者：
B. Taguchi;H. Nakamura;M. Nonaka;S. Xie
摘要通过对比2003/04年冷季的两组大气区域模式后播试验，研究了黑潮和大潮延伸区（KOE）洋面锋对上覆大气的影响。两组试验分别采用模式下边界规定的海表温度（SST）的精细尺度锋面结构和人工平滑的海表温度分布。对比结果表明，局地海锋区热湿湍流通量和地面气温经向梯度增强，有利于冬季和春季风暴路径的发展。然而，在风暴路径活动如何主要影响来自海洋的热量和水分供应的时间平均分布方面，发现了明显的季节性依赖关系。春季平均地表感热通量（SHF）在亚北极海温锋的暖（冷）侧呈上升（下降）趋势。这种鲜明的正面对比是……
Abstract Influences of oceanic fronts in the Kuroshio and Oyashio Extension (KOE) region on the overlying atmosphere are investigated by comparing a pair of atmospheric regional model hindcast experiments for the 2003/04 cold season, one with the observed finescale frontal structures in sea surface temperature (SST) prescribed at the model lower boundary and the other with an artificially smoothed SST distribution. The comparison reveals the locally enhanced meridional gradient of turbulent fluxes of heat and moisture and surface air temperature (SAT) across the oceanic frontal zone, which favors the storm-track development both in winter and spring. Distinct seasonal dependency is found, however, in how dominantly the storm-track activity influences the time-mean distribution of the heat and moisture supply from the ocean. In spring the mean surface sensible heat flux (SHF) is upward (downward) on the warmer (cooler) side of the subarctic SST front. This sharp cross-frontal contrast is a manifestation of...