| 4种表层风场资料在北半球海域的适用性评估 |
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| 引用本文： | 刘解明,熊学军,宫庆龙,于龙,郭延良.4种表层风场资料在北半球海域的适用性评估[J].海洋科学进展,2020,38(1):38-50. |
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| 作者姓名： | 刘解明 熊学军 宫庆龙 于龙 郭延良 |
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| 作者单位： | 中国海洋大学海洋与大气学院,山东青岛,266100,自然资源部第一海洋研究所,山东青岛266061;青岛海洋科学与技术试点国家实验室区域海洋动力学与数值模拟功能实验室,山东青岛266061,自然资源部第一海洋研究所,山东青岛,266061 |
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| 基金项目： | 国家科技重大专项项目——南海北部内波流监测、预报、预警系统研究及应用;国家自然科学基金项目——黄海暖流的多时相特征及其发生机制研究;国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目——海洋环境动力学和数值模拟;国家海洋局全球变化与海气相互作用专项子课题——黑潮不稳定性及多核结构 |
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| 摘 要： | 为进行海洋表层风场的物理结构重建与基础理论溯源,需选用可靠准确且通过检验的高时空分辨率风场资料。本文利用NDBC、TAO和嵊泗站现场观测资料,在全面比较分析的基础上,对其中应用较广泛的CFSR/CFSv2、ERA-Interim、FNL和CCMP四种风场产品在北半球海域(北太平洋、北大西洋)进行了检验评估,得出结论:1)4种资料的风速都不同程度地低估了实际观测风速;在低风速区的风向偏差较大,风速越低,偏差越多;产品资料在远岸地区比近岸地区更接近实测资料,在高纬地区的效果优于低纬地区。2)通过比较4种产品资料与浮标实测资料的风向和风速的偏差、均方根误差、误差标准差和相关系数,发现CCMP资料是4种资料中整体效果最好的一种,而CFSR/CFSv2资料是较差的一种。3)嵊泗站观测平台资料与浮标观测资料验证的结论略有差异,结果显示:FNL资料是4种资料产品中效果最好的产品,ERA-Interim资料的效果仅次于FNL,而用浮标验证效果较好的CCMP资料在嵊泗站点效果却较差,CFSR/CFSv2资料是4种资料中效果最差的。4)通过分析4种风场资料的偏差分布发现,CCMP与ERA-Interim风场资料的偏差较小,而CFSR/CFSv2与FNL风场资料的偏差较小。CCMP资料与其他3种资料的纬向风偏差在海洋上以负偏差为主,陆地以及沿岸地区的偏差较大,且分布不均匀;经向风偏差分布中,南半球的正偏差区较为明显,而北半球的负偏差区则较为明显,但偏差程度要小于纬向风偏差。
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| 关 键 词： | 表层风场 CFSR/CFSv2 ERA-INTERIM FNL CCMP 空间差异 |
Applicability Evaluation of Four Surface Wind Products in the Northern Hemisphere Sea Area |
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| LIU Xie-ming,XIONG Xue-jun,GONG Qing-long,YU Long,GUO Yan-liang.Applicability Evaluation of Four Surface Wind Products in the Northern Hemisphere Sea Area[J].Advances in Marine Science,2020,38(1):38-50. |
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| Authors: | LIU Xie-ming XIONG Xue-jun GONG Qing-long YU Long GUO Yan-liang |
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| Institution: | (College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266100,China;First Institute of Oceanography,MNR,Qingdao 266061,China;Laboratory for Regional Oceanography and Numerical Modeling,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266061,China) |
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| Abstract: | In order to reconstruct the physical structure of sea surface wind field, reliable, accurate and tested data with high spatial and temporal resolution are necessary. Comprehensive comparison is applied to observational data of NDBC, TAO and Shengsi station to evaluate the four wind products, CFSR/CFSv2, ERA-Interim, FNL and CCMP, with focus in northern hemisphere sea area(North Pacific and North Atlantic), and our conclusions are: 1) Wind speed is underestimated in all the four data products in various degree. The bias of wind direction is larger in the region where wind speed is low. The data in open oceans is closer to observation than those in coastal area, and the data in high latitudes have better quality than those in low latitudes. 2) Comparison on bias, root mean square error, standard deviation and correlation coefficient of wind direction and speed reveals that the CCMP is the most accurate data product, while the CFSR/CFSv2 is the worst. 3) Comparison with ShengSi platform observation data and buoy data shows that the FNL is the best, ERA-Interim ranks the second, the accuracy of CCMP verified by station data is lower than that verified by buoy data, and the CFSR/CFSv2 has the worst accuracy. 4) Bias distribution of the four datasets further demonstrated that the bias between CCMP and ERA-Interim is smaller, and the bias between CFSR/CFSv2 and FNL is also smaller. The biases of zonal wind of CCMP and the other three products are mostly negative in open oceans but mostly positive in coastal areas. For the bias of meridional wind, positive values are dominant in southern and negative ones are dominant in northern hemisphere, but the values are smaller than the zonal wind bias. |
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| Keywords: | surface wind CFSR/CFSv2 ERA-Interim FNL CCMP spatial difference |
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