| 丹东冬季降水相态判据研究 |
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| 引用本文： | 高松影,李慧琳,宋丽丽,赵婷婷,徐璐璐.丹东冬季降水相态判据研究[J].气象与环境学报,2014,30(2):38-44. |
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| 作者姓名： | 高松影 李慧琳 宋丽丽 赵婷婷 徐璐璐 |
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| 作者单位： | 丹东市气象局，辽宁 丹东 118000 |
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| 基金项目： | 资助项目：中国气象局2013年预报员专项（CMAYBY2013-014）资助. |
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| 摘 要： | 利用丹东1979-2012年10月至翌年4月逐日降水、天气现象、高空探空资料及NCEP0.5°×0.5°（部分2.5°×2.5°）再分析资料，对丹东地区冬季不同相态降水气候及大气层结特征进行了统计分析, 并对不同相态降水典型个例进行了分析。结果表明：丹东地区虽地处北方，但冬季降水相态多样。在秋冬、冬春过渡和严冬不同时段，大气不同层结不同相态降水气温阈值范围不同，建立了丹东冬季不同大气层结降水相态判据。大气不同层结前期特别是近地面层气温背景与不同相态降水的发生与转换关系密切，可为动态预报降水相态提供了参考。850 hPa及以下中低空温度条件对冬季降水相态形成至关重要，850 hPa的0℃线能较好区分雨和雪区大致范围，925 hPa的0 ℃线能较好区分雨夹雪和雪以及雨夹雪和雨大致范围。
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| 关 键 词： | 冬季降水 降水相态 识别判据 |
Study on criteria for winter precipitation phase states in Dandong |
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| GAO Song-ying,LI Hui-lin,SONG Li-li,ZHAO Ting-ting,XU Lu-lu.Study on criteria for winter precipitation phase states in Dandong[J].Journal of Meteorology and Environment,2014,30(2):38-44. |
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| Authors: | GAO Song-ying LI Hui-lin SONG Li-li ZHAO Ting-ting XU Lu-lu |
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| Institution: | Dandong Meteorological Service, Dandong 118000,China |
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| Abstract: | Based on the daily precipitation data, weather phenomenon, radiosonde data, and the NCEP reanalysis data with resolution of 0. 5 ° × 0. 5° （part 2. 5 °× 2. 5°） during October to April from 1979 to 2012, the climate and atmospheric stratification characteristics of winter precipitation in different phase states were analyzed in Dandong. The typical cases of winter precipitation in the different phase states were discussed. The results show that although Dandong is located in the north of China, winter precipitation phase states are variety. The temperature thresholds for various winter precipitation phase states at each stratification are different in the periods of autunm-winter, win- ter-spring and winter. Finally the criteria for winter precipitation phase states at the different stratification are deter- mined. The stratification temperature background （especially surface temperature） is important to appearance and conversion of precipitation phase states, which could provide references for the prediction of the dynamic precipita- tion phase state. Temperature at 850 hPa and below is essential to generation of precipitation phase states. The 0 ℃ line at 850 hPa is the approximate boundary between rain and snow, while that at 925 hPa is between sleet and snow or sleet and rain. |
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| Keywords: | Winter precipitation Precipitation phase states Criteria |
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