Estimation of Global Wind Energy Input to the Surface Waves Based on the Scatterometer

Estimation of Global Wind Energy Input to the Surface Waves Based on the Scatterometer
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基于散射仪的全球风能输入面波估算

DOI:
10.1109/lgrs.2012.2189194
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发表时间:
2012-04
影响因子:
4.8
通讯作者:
Hui Shen
Hui Shen
中科院分区:
工程技术2区
文献类型:
--
作者:
刘国强;何宜军;Yuanzhi Zhang;Hui Shen

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从大气输入到海洋的机械能主要是通过海洋表面的波浪产生的。首先,基于经验公式和从地球遥感1/2卫星散射计观测数据中获取的波龄(β),估计风力产生的总表面波能接近80 TW (1 TM = 1012 W)。②风生表面波能量密度分布表明,主要输入在南半球西风带,7 d周期内全球海洋表面波能量密度最高可达3.58 W/m2,平均值为0.24 W/m2。第三,我们发现在南大洋和西北太平洋和大西洋的风暴路径中,风向表面波的能量下降率可达24%左右,而在热带海洋中,风向表面波的能量下降率较低,约为7%,全球海洋平均为11%。
Mechanical energy input into the ocean from the atmosphere is primarily produced via the ocean surface waves. First, the total wind generation surface wave energy is estimated as nearly 80 TW (1 TM = 1012 W), based on an empirical formulation and the wave age (β) retrieved from the Earth Remote Sensing-1/2 satellite scatterometer observations. Second, the distribution of the wind-generated surface wave energy density shows that the main input occurs in the westerlies in the Southern Hemisphere and could reach up to 3.58 W/m2 with an average value of 0.24 W/m2 in the global ocean during a seven-day period. Third, we find that the downward energy flux rate from wind to surface waves can reach around 24% in the Southern Ocean and storm tracks in the northwest Pacific and Atlantic Oceans where the wind waves dominate, but a low downward rate of around 7% in tropical oceans with an average of 11% over the global oceans is observed.
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