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气象:2009,35(2):101-105
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2007年西北太平洋热带气旋定位和预报精度评定
(中国气象局上海台风研究所,中国气象局上海台风预报技术重点实验室, 200030)
Precision Assessment for Tropical Cyclone Positioning and Forecasts over the Northwest Pacific in 2007
(1.Shanghai Typhoon Institute;2.Laboratory of Typhoon Forecast Technique, CMA, Sh anghai 200030)
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投稿时间:2008-09-11    修订日期:2008-12-23
中文摘要: 依据《台风业务和服务规定》分析2007年TC业务定位和业务预报精度,结果表明: 各方法的平均定位误差均小于25km, 强度预报的24小时和48小时近中心最大风速平均误差为3~7m?s-1和5~11m?s-1, 均与往年相当; 综合预报的24小时和48小时路径平均距离误差分别为129.8km和215.0km。虽然路径数值预报的能力仍然不能与综合预报相比, 但是多模式集成方法相对于综合预报有正技巧, 说明这类方法可能成为改善路径预报的途径之一。强度预报的主要参考仍然是统计类预报方法。
中文关键词: 热带气旋  定位  预报精度
Abstract:Positioning and forecast errors of tropical cyclones over the Northwest Pacific in 2007 are analyzed. The results are as follows: (1) The average error of tropi cal cyclone position is less than 25 km. (2) Error of intensity forecasts is sim ilar to that in past years with an average of 3~7m?s-1 and 5~11m?s -1 for 24h and 48h forecasts, respectively. (3) Average error of synthetic track forecasts is 129.8 km (24h) and 215.0 km (48h). Although numerical models are still not as good as synthe tic forecasters in track prediction, the super ensemble method of multiple numer ical models demonstrates positive skill compared with synt hetic forecasts. Statistical methods are still widely used in intensity predicti on.
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基金项目:所有精度评定数据经中国气象局第六届全国台风及海洋气象专家工作组第二次会议审定
引用文本:
李佳,余晖,应明,梁旭东,2009.2007年西北太平洋热带气旋定位和预报精度评定[J].气象,35(2):101-105.
Li Jia,Yu Hui,Ying Ming,Liang Xudong,2009.Precision Assessment for Tropical Cyclone Positioning and Forecasts over the Northwest Pacific in 2007[J].Meteor Mon,35(2):101-105.