Low-Level Easterly Winds Blowing through the Tsugaru Strait, Japan. Part I: Case Study and Statistical Characteristics Based on Observations
Low-Level Easterly Winds Blowing through the Tsugaru Strait, Japan. Part I: Case Study and Statistical Characteristics Based on Observations
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DOI：
10.1175/2010mwr3354.1
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发表时间：
2010-10
影响因子：
3.2
通讯作者：
T. Shimada;M. Sawada;W. Sha;H. Kawamura
中科院分区：
文献类型：
--
作者：
T. Shimada;M. Sawada;W. Sha;H. Kawamura
摘要本研究调查了夏季日本北方由津轻海峡、陆津湾和环日本陆隙组成的东西向通道中东风的结构和日变化。根据观测和再分析数据，在2003年6月的一个代表性的案例研究和补充统计分析。凉爽的东风伴随着云和雾被中央山脉阻挡。这种情况增加了沿海峡的海平面气压梯度，从而在海峡西部引起强风。鄂霍次克高压的发展和沿着日本南部海岸或日本海上空的低压系统增强了沿海峡的SLP梯度。在夜间（白天）观察到较强（较弱）和偏东（东北偏东）风，对应于冷空气从东部入侵（从西部撤退）。在气象观测站观测到的SLP差异...
Abstract This study has investigated structures and diurnal variations of the easterly surface winds blowing throughout the east–west passage comprising the Tsugaru Strait, Mutsu Bay, and circumjacent terrestrial gaps in northern Japan during the summer months. Based on observational and reanalysis data, a representative case study in June 2003 and supplemental statistical analyses are presented. The cool easterly winds accompanied by clouds and fog are blocked by the central mountain range. This condition increases an along-strait sea level pressure (SLP) gradient, which induces strong winds in the west of the strait. The along-strait SLP gradient is enhanced by the developed Okhotsk high and by low pressure systems passing along the southern coast of Japan or over the Japan Sea. Stronger (weaker) and easterly (east-northeasterly) winds are observed during the nighttime (daytime), corresponding to the cool air intrusion from the east (retreat from west). Differences in SLP observed at meteorological obse...