Determining the Extratropical Transition Onset and Completion Times of Typhoons Mindulle(2004)and Yagi(2006)Using Four Methods
- 作者：Qian WangQingqing LiGang Fu
- 会议时间：2013-10-23
- 关键词：Operational ; forecasting
- 作者单位：Qian Wang(National Meteorological Center of China Meteorological Administration,Beijing,China;Shanghai Typhoon Institute and Laboratory of Typhoon Forecast Technique/China Meteorological Administration,Shanghai,China;Department of Marine Meteorology,Ocean University of China,Qingdao,China)Qingqing Li(Shanghai Typhoon Institute and Laboratory of Typhoon Forecast Technique/China Meteorological Administration,Shanghai,China)Gang Fu(Department of Marine Meteorology,Ocean University of China,Qingdao,China)
- 母体文献：第30届中国气象学会年会论文集
- 会议名称：第30届中国气象学会年会
- 会议地点：南京
- 主办单位：中国气象学会
- 语种：chi
摘要
Four methods for determining the extratropical transition (ET) onset and completion times of Typhoons Mindulle (2004) and Yagi (2006) were compared using four numerically analyzed datasets.The open-wave and scalar frontogenesis parameter methods failed to smoothly and consistently determine the ET completion from the four data sources,because some dependent factors associated with these two methods significantly impacted the results.Although the cyclone phase space technique succeeded in determining the ET onset and completion times,the ET onset and completion times of Yagi identified by this method exhibited a large distinction across the datasets,agreeing with prior studies.The isentropic potential vorticity method was also able to identify the ET onset times of both Mindulle and Yagi using all the datasets,whereas the ET onset time of Yagi determined by such a method differed markedly from that by the cyclone phase space technique,which may create forecast uncertainty.