| 塔什干低涡天气过程的计算机识别 |
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| 引用本文： | 秦贺.塔什干低涡天气过程的计算机识别[J].新疆气象,2014,8(4):15-17. |
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| 作者姓名： | 秦贺 |
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| 作者单位： | 新疆气象台 |
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| 基金项目： | 中国沙漠气象科学研究基金;国家重点基础研究发展规划项目;国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 根据塔什干低涡的定义，利用NCEP／NCAR日平均再分析高度场、温度场资料，运用计算机编程自动识别、追踪塔什干低涡的中心位置、中心强度和持续时间，进而获取塔什干低涡天气过程的数据集。此计算机识别程序中有两个关键判断条件：一是某格点i的高度值小于其外围格点高度值，二是低涡范围内任意格点的纬向温度二阶导数大于零。实践证明该方法对塔什干低涡系统的识别准确且省时省力，同时避免了人工挑选的主观性误差。
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| 关 键 词： | 自动识别 塔什干低涡 新疆 |
| 收稿时间： | 2013/9/10 0:00:00 |
| 修稿时间： | 2013/9/25 0:00:00 |
Computer Recognition of Tashkent vortex weather process |
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| qinhe.Computer Recognition of Tashkent vortex weather process[J].Bimonthly of Xinjiang Meteorology,2014,8(4):15-17. |
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| Authors: | qinhe |
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| Institution: | Xinjiang Meteorological Observatory |
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| Abstract: | Based on the definition of Tashkent vortex, center longitude, latitude, center strength and duration of Tashkent vortex are recognized automatically with computer program by using the NCEP/NCAR reanalysis data. Then the dataset of Tashkent vortex weather process are obtained to be investigated. There are two Critical judgment conditions in the Computer Recognition program : the one is height of grid I is less than its peripheral grid height. The other is second derivative of zonal temperature on any grid within vortex is greater than zero. Practice proves this computer recognition method is reliable and simple in operation, and avoids the subjective error of artificial selection. |
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| Keywords: | computer recognition Tashkent vortex Xinjiang |
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