南中国海10m风和海面动态粗糙度特征研究

发布时间：2018-02-14 18:07

本文关键词： 风速订正海面风速变化动态粗糙度　出处：《气象》2016年12期 　论文类型：期刊论文

【摘要】：根据海面粗糙度(z_0)与海面10 m风速的关系,本文提出一种适用于海上10 m风速求解算法。通过和ERA-Interim风速比较,发现用这种动态z_0法订正的风速比固定z_0法更接近ERA-Interim风速,相关性更好。基于这种动态z_0法,利用南中国海两个海上平台站的资料,计算得到近4年逐时10 m风速及对应的动态粗糙度。分析发现风速主要集中在3~13 m·s~(-1),4—9月平均风速较小,从10月到次年3月平均风速较大。从风速日变化来看,14—17时风速达到最小;06一09时达到最大。另外,z_0有明显的季节变化和日变化,与风速变化一致。分析了台风韦森特中心过境时,气象要素的变化说明订正后的风速及z0_0符合实际观测值。
[Abstract]:According to the relationship between sea surface roughness and 10 m wind speed, this paper presents an algorithm for solving 10 m wind speed at sea. By comparing with ERA-Interim wind speed, it is found that the revised wind speed by this dynamic z0 method is closer to ERA-Interim wind speed than that by fixed zS0 method. The correlation is better. Based on the data of two offshore platform stations in the South China Sea, the wind speed of 10 m and the corresponding dynamic roughness are calculated in the last 4 years. The results show that the wind speed is mainly concentrated in the mean wind speed of 313m 路s-1 in April-September. From October to March, the average wind speed is larger. From the daily variation of wind speed, the wind speed reaches the minimum range from 06 to 09:00 and the maximum from 14 to 17. In addition, there are obvious seasonal variations and diurnal variations in the wind speed. In accordance with the variation of wind speed, the variation of meteorological elements during the transit of Typhoon Vicente Center shows that the revised wind speed and z _ 0s _ 0 accord with the actual observed values.
【作者单位】：深圳市国家气候观象台;深圳南方强天气研究重点实验室;深圳市气象服务中心;
【基金】：国家自然科学基金项目(41575005)资助
【分类号】：P732

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