| 一种风暴轴逐日监测的方法及应用 |
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| 引用本文： | 顾聪,朱伟军.一种风暴轴逐日监测的方法及应用[J].气象科学,2015,35(3):268-278. |
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| 作者姓名： | 顾聪 朱伟军 |
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| 作者单位： | 南京信息工程大学 气象灾害教育部重点试验室, 南京 210044,南京信息工程大学 气象灾害教育部重点试验室, 南京 210044 |
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| 基金项目： | 公益性行业(气象)科研专项(GYHY201306028);国家自然科学基金资助项目(41075070) |
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| 摘 要： | 提出了一种风暴轴逐日监测的方法, 可以获得逐日的风暴轴变化情况。并且采用了动态阈值定义了新的风暴轴的强度和位置指数, 从而可以有效对比不同层次、不同区域、不同时间的风暴轴变化情况。利用NCEP/NCAR再分析资料进行了监测结果的诊断分析。结果表明:各气象要素滤波结果都能表现出两个风暴轴主体, 但有位置上的差别。同时可以利用逐日检测的结果求得逐候、逐月的风暴轴监测结果。在不同高度的风暴轴中, 250~300 hPa高度的风暴轴强度最大, 850 hPa有极小值出现, 各层风暴轴强度呈现准正压结构。采用500 hPa高度场风暴轴监测结果做代表, 讨论了两大洋上各自的风暴轴偏强/偏弱、偏东/偏西、偏北/偏南时同期大气环流的500 hPa高度场和300 hPa纬向风场差异。
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| 关 键 词： | 大气环流 风暴轴 遥相关 北大西洋涛动 |
| 收稿时间： | 1/8/2014 12:00:00 AM |
| 修稿时间： | 2014/8/18 0:00:00 |
Daily monitoring method of storm track and its application |
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| GU Cong and ZHU Weijun.Daily monitoring method of storm track and its application[J].Scientia Meteorologica Sinica,2015,35(3):268-278. |
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| Authors: | GU Cong and ZHU Weijun |
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| Institution: | Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China and Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | A daily monitoring method was proposed to get daily variation of storm track. Moreover, a dynamic threshold was used to indentify the intensity and location index of the new storm tracks in order to compare the storm tracks at different levels, in different areas and at different time effectively. Furthermore, the NCEP/NCAR reanalysis data was used to analyze the monitoring results diagnostically. Results show that all the meteorological elements presented two main bodys of storm tracks, but the differenc in position was quite evident. The pentadly and monthly storm tracks index can be derived from the daily monitoring results. The maximum value of storm tracks' intensity existed at 250 hPa-300 hPa while the minimum one at 850 hPa, all of which showed a quasi-barotropic structure. The monitoring results at 500 hPa geopotential height field were selected to discuss the differences of 500 hPa height field and 300 hPa zonal wind field of atmospheric circulation when extreme storm tracks process happened. |
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| Keywords: | Atmospheric circulation Storm tracks Teleconnection pattern North Atlantic Oscillation |
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