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首页> 外文期刊>Journal of oceanography >Case study of wind jet transition and localized responses of wind wave along the pacific coast of Northern Japan by synergetic use of satellite and in situ observations
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Case study of wind jet transition and localized responses of wind wave along the pacific coast of Northern Japan by synergetic use of satellite and in situ observations

机译：协同使用卫星和原位观测资料研究日本北部太平洋沿岸风射流过渡和风波局部响应的案例

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摘要

We present a case study of low-level wind jets induced in sequence by orographic effects off the Pacific coast of northern Japan during 7–11 June 2003, and demonstrate that the transition of the wind jets causes areal differences of wave height variations along the coast. First, we describe evolution and structure of the wind jet by analyzing SeaWinds scatterometer wind measurements. Under the easterly wind, a strong wind jet formed after passing by Cape Erimo. As the wind shifted to the southeast, the wind jet started to decay. In turn, the southerly wind along the coast led to another wind jet in the lee of the easternmost tip of the Sanriku coast. We then identify onsets and decays of the wind jets from time series of wind speed at meteorological stations. Finally, we demonstrate that the transition of the wind jets has local impacts on wave height variations. Significant wave heights measured by altimeters were correlated positively with local wind energy, i.e., squares of wind speeds. Accompanying the wind jet formation/decline, significant differences of wave height variations became marked among wave observation stations located along the coast at intervals of up to 50 km.
机译：我们对2003年6月7日至11日在日本北部太平洋沿岸的地形影响依次诱发的低水平风喷射进行了案例研究，并证明了风喷射的转变会引起沿海岸波高变化的面积差异。 。首先，我们通过分析SeaWinds散射仪的风速测量来描述风射流的演变和结构。在东风的作用下，经过埃里莫角后形成了强风。随着风向东南移动，喷气流开始衰减。反过来，沿着海岸的南风又导致了三陆海岸最东端的背风处的另一股喷气流。然后，我们从气象台站的风速时间序列中识别出风喷的起伏和衰减。最后，我们证明了风喷的过渡对波高变化有局部影响。用高度计测得的重要波高与当地风能正相关，即风速的平方。伴随着风喷射的形成/下降，沿海岸以50 km为间隔的波观测站之间，波高变化的显着差异变得明显。

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