| 南海北部海面风速概率分布特征 |
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| 引用本文： | 廖菲,邓华,曾琳,Chan Pak-wai.南海北部海面风速概率分布特征[J].海洋学报,2018,40(5):37-47. |
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| 作者姓名： | 廖菲 邓华 曾琳 Chan Pak-wai |
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| 作者单位： | 1.广州市气象台, 广东 广州 511430;中国气象局广州热带海洋气象研究所, 广东 广州 510080 |
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| 基金项目： | 广东省科技计划项目（2013B020200013，2016A020223015）；广州市科技计划项目（201604020069，201607020043）。 |
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| 摘 要： | 利用南海北部的浮标、石油平台观测的海面风资料，分析了0~200 km范围内，不同离岸距离站点的风速的概率分布特征。观测结果指出，各站平均风速一般最大值出现在冬季，最小值出现在夏季，具有明显的季节变化特征，并且平均风速随着离岸距离的增大也逐渐增大。对于离岸距离较近的区域（100 km以内），海面风基本符合双参数的Weibull分布，但对于100 km以外的海面风速概率分布与Weibull分布存在明显差异，随着离岸距离的增大，平均风速和风速标准偏差也相应增大。风速平均值与风速标准偏差的比值较小时，Weibull分布的偏斜度基本为正值，当比值较大时偏斜度转为负值。随着离岸距离的增大，出现与Weibull分布不一致的情况越来越多，且与对应的Weibull分布相比，其偏斜度越小，风速概率分布越不能用Weibull分布进行较好拟合。
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| 关 键 词： | 海面风 概率分布 离岸距离 |
| 收稿时间： | 2017/6/7 0:00:00 |
| 修稿时间： | 2017/10/11 0:00:00 |
The probability distribution of sea surface wind speeds over the northern South China Sea |
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| Liao Fei,Deng Hu,Zeng Lin and Chan Pak-wai.The probability distribution of sea surface wind speeds over the northern South China Sea[J].Acta Oceanologica Sinica (in Chinese),2018,40(5):37-47. |
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| Authors: | Liao Fei Deng Hu Zeng Lin and Chan Pak-wai |
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| Institution: | 1.Guangzhou Meteorological Observatory, Guangzhou 511430, China;Guangzhou Institute of Tropical and Marine Meteorology, CMA, Guangzhou 510080, China2.Guangdong Ecological Meteorology Center, Guangzhou 510080, China;Guangzhou Institute of Tropical and Marine Meteorology, CMA, Guangzhou 510080, China3.Guangzhou Meteorological Observatory, Guangzhou 511430, China4.Hong Kong Observatory, Hong Kong 999077, China |
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| Abstract: | The probability distribution characteristics of wind speed in the northern part of the South China Sea are analyzed based on buoy and oil platform sites within 0-200 km different offshore distance. Observation results indicate that the maximum average wind speed is strongest in the winter season and weakest in the summer, and the average wind speed rise gradually with the increase of the offshore distance. A two parameters Weibull distribution structure is modeled well in the observed sea surface wind speed from stations within the offshore distance area (<100 km), but the feature of sea surface wind speed of the stations outside of 100 km can not account for the Weibull structure, and the average wind speed and wind speed standard deviation arise with the increase of distance from the shore. The skewness of the wind speed is a concave downward function of the ratio of the mean wind speed to its standard deviation, such that the skewness is positive where the ratio is relatively small. The observed skewness of offshore distance stations are obviously smaller than corresponding Weibull skewness, which indicate that non-Weibull structure behavior is evident in these stations. |
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| Keywords: | sea wind probability distribution offshore distance |
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