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投稿时间:2009-09-18 修订日期:2010-04-30
投稿时间:2009-09-18 修订日期:2010-04-30
中文摘要: 利用天津市1986—2008年13个测站日降水资料,总结天津市降水特征并分析人影作业影响因子在其中产生的影响。结果表明:天津市降水空间分布不均匀,东西方向差异小,南北方向差异较大,雨量由北向南呈现递减趋势,且北部等值线密集,南部稀疏,雨量递减的速率由北向南减慢。降水季节性差异较大,降雨量和降雨日数都集中分布在夏季,春秋两季降雨次之,冬季降雨最少;人影作业未改变天津区域雨量相关系数,对空间分布影响较小,这与天津的作业特点有关;人影作业会对雨型概率分布产生影响,对1986—2001年和2002—2008年两个时期的各个雨型降雨日概率进行对比分析,结果表明,人影作业后的小雨降雨日概率相对较小,中雨以上的降雨日概率相对较高,但这些差别并不明显。
中文关键词: 降水特征, 人影作业, 概率, 影响
Abstract:Based on the precipitation data at 13 stations in Tianjin from 1986 to 2008, the precipitation characteristics and the weather modification influence are analyzed in this article. The results show that: the spatial distribution of precipitation is uneven, the difference is small in west east direction, but large in north south direction. The rainfall presents a descending trend from north to south, and the isolines are dense in north while sparse in south. The rate of decreasing rainfall slows down from north to south. The difference is obvious in different season, the rainy days and precipitation amount are mainly concentrated in summer, the precipitation is less in spring and autumn while is least in winter. The weather modification does not change the correlation coefficient of rainfall in Tianjin, and it also has little influence on the spatial distribution. These are related to the characteristics of weather modification in Tianjin. The weather modification operations have influence on probability distribution of the rain type, but the influence is small. After comparing the probability distribution of different rain type in 1986-2001 and 2002-2008, we can find that the probability of light rain days is relatively low while the probability of moderate rain days is higher after the weather modification operations, but these differences are not significant.
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基金项目:国家科技支撑计划课题“混合云人工增雨技术研究”(2006BAC12B02)、科技部公益性行业(气象)科研专项项目“京津经济区及华北区域气溶胶对云的改变导致的降水变化及其在天气预报中的应用”、中国气象局云雾物理环境重点开放实验室开放科研课题“基于雷达Z R关系双比分析的人工增雨作业效果检验技术方法研究”(2009004)和国家科技支撑计划课题天津子专题(2006BAC12B00 01 01 04)
作者 | 单位 |
靳瑞军 | 天津市人工影响天气办公室, 天津 300074 |
王婉 | 天津市人工影响天气办公室, 天津 300074 中国气象局云雾物理环境重点开放实验室, 中国气象科学研究院, 北京 100081 |
宋薇 | 天津市人工影响天气办公室, 天津 300074 |
王兆宇 | 天津市人工影响天气办公室, 天津 300074 |
引用文本:
靳瑞军,王婉,宋薇,王兆宇,2011.天津市降水特征及人影作业影响分析[J].气象,37(1):92-98.
JIN Ruijun,WANG Wan,SONG Wei,WANG Zhaoyu,2011.Tianjin Precipitation Feature and Analysis of Weather Modification Influence[J].Meteor Mon,37(1):92-98.
靳瑞军,王婉,宋薇,王兆宇,2011.天津市降水特征及人影作业影响分析[J].气象,37(1):92-98.
JIN Ruijun,WANG Wan,SONG Wei,WANG Zhaoyu,2011.Tianjin Precipitation Feature and Analysis of Weather Modification Influence[J].Meteor Mon,37(1):92-98.