| P-T大气稳定度日夜分界限取值的研究 |
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| 引用本文： | 孟庆珍,邓新民.P-T大气稳定度日夜分界限取值的研究[J].成都信息工程学院学报,1991(2). |
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| 作者姓名： | 孟庆珍 邓新民 |
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| 作者单位： | 成都气象学院
(孟庆珍)，成都气象学院(邓新民) |
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| 摘 要： | 本文用两种不同日夜分界限统计了成都、重庆的P-T大气稳定度频率。结果表明,两种分界统计大气稳定度频率,不稳定类完全相同;以h=0分界比以h=k_1分界中性频率增加,稳定频率减少,两者频率差值大小与地理位置、气候和天气特征有关;这与理论分析完全符合。通过对比指出,h=0分界的应用有局限性。同时,通过计算表明,实际工作中,太阳赤纬σ每十日取一概略值已足够精确了。
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| 关 键 词： | 环境气象学 P-T法 太阳高度角 太阳赤纬 |
THE STUDY ON THE PROBLEM OF THE WAY TO DIVIDE DAY AND NIGHT IN P-T CLASSIFICATION METHOD OF ATMOSPHERIC STABILITY |
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| Meng Qingzhen Deng Xinmin.THE STUDY ON THE PROBLEM OF THE WAY TO DIVIDE DAY AND NIGHT IN P-T CLASSIFICATION METHOD OF ATMOSPHERIC STABILITY[J].Journal of Chengdu University of Information Technology,1991(2). |
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| Authors: | Meng Qingzhen Deng Xinmin |
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| Institution: | Chengdu Institute of Meteorology |
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| Abstract: | In this paper, the percentage occurrence of P-T atmospheric stability classes in Chengdu and Chongqing is obtained through statistic method by using two different way to divide day and night. The comparison of two results shows that the percentage occurrence of unstable classes is quite the same. The percentage occurrence of neutral class of the division h=0 is higher than that of the division h-hi, but its percentage occurrence of stable classes is lower. The difference between the two divisions depends on the geographic location of observational station and the features of local weather and climate, this accords well with the theoretical analysis. It is pointed out that'the availability of the division h = 0 is limited. And the calculation also shows that the adoption of one approximate value of declination of the sun every 10 days in practical work is accurate enough. |
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| Keywords: | Environmental meteorology P-T method Solar attitude Declination of the sun |
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