Assessment of tropical cyclones in Ecmwf Reanalysis Data over Northwest Pacific Ocean
Assessment of tropical cyclones in Ecmwf Reanalysis Data over Northwest Pacific Ocean
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发表时间：
2017-07
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通讯作者：
Jiang‐Long Li;S. Pan;Yongping Chen;Yi Pan
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作者：
Jiang‐Long Li;S. Pan;Yongping Chen;Yi Pan
利用ECMWF再分析海面风速资料，对2013-2015年西北太平洋热带气旋路径进行涡度分析。从ECMWF再分析资料中提取了TC中心附近的最大风速。再分析资料中提取的台风路径和最大风速与最佳路径资料进行比较，以评估热带气旋在ECMWF再分析资料中的代表性。结果表明，利用ECMWF资料，可以根据研究时段内的涡度特征合理地确定TC路径的位置。然而，涡度和TC强度之间的相关性很差。TC的最大风速被发现是显着低于最佳跟踪数据。本研究提供了一些量化和指导使用ECMWF再分析资料的风暴潮和风暴潮的预报在NWP区域。
In this study, vorticity analysis is carried out on the ECMWF reanalysis data of sea surface wind speed, to identify the track of tropical cyclones (TCs) in the Northwest Pacific Ocean region over a period of three years (2013-2015). The maximum wind speed in the adjacent of the identified TC centre is also extracted from the ECMWF reanalysis data. The typhoon tracks and the maximum wind speed extracted from reanalysis data are then compared with the Best-Track data to assess the representation of TCs in the ECMWF reanalysis data. The results show that the locations of TC tracks can be reasonably determined from the ECMWF data by the vorticity in the studied period. However, the correlation between the vorticity and intensity of the TC is poor. The maximum wind speed of the TCs are found to be significantly lower than the Best-Track data. This study provides some quantification and guidance on the use of ECMWF reanalysis data for the predictions of storm waves and surges in the NWP region.