| 贵州威宁1997-2017年冰雹时空变化特征分析 |
| |
| 引用本文： | 曾勇,邹书平,曹水,等.贵州威宁1997-2017年冰雹时空变化特征分析[J].高原山地气象研究,2018,38(2):23-27. |
| |
| 作者姓名： | 曾勇 邹书平 曹水 等 |
| |
| 作者单位： | 1. 贵州省冰雹防控技术工程中心, 贵阳 550081; |
| |
| 基金项目： | 国家自然科学基金(41365001)冰雹云跃增特性和响应时间相关性研究贵州省气象局2018年开放基金项目(黔气科合KF[2018]03号)"贵州威宁冰雹云定点定量识别技术方法应用研究 |
| |
| 摘 要： | 利用威宁县37个人影作业点收集1997～2017年35个乡镇的地面降雹资料，应用统计学方法和ArcGis地理信息分析工具，分析了威宁县冰雹日的年际、月际、日变化特征、空间分布特征以及海拔高程与降雹频次相关性。分析结果表明:威宁县年平均冰雹日数为15.3d,冰雹日数的年际变化总体呈现先减少后增加趋势，但冰雹日数均小于20世纪末期；冰雹日数M-K检验表明从2003年开始冰雹日数呈逐渐上升趋势，在2010年后出现冰雹日数突变现象；冰雹主要发生在4～8月，占整个降雹日的98.36%，春季、夏季多，秋季、冬季少。春季冰雹日数占31.15%，夏季冰雹日数占67.21%；一天内冰雹主要发生在13～21时，占全部冰雹发生次数的85.07%，即午后到傍晚发生频率高；冰雹主要出现在县的北部、中部、西部至西北部、南部至西南部一线，各个乡镇海拔高程与降雹次数存在正相关，相关系数为0.412，降雹次数随地形高程增加呈现增加趋势，降雹次数与经纬度差异没有相关性。以上这些结论可为威宁县冰雹预报指标研究和开展人工防雹提供科学参考，为冰雹防灾减灾提供技术支撑。
|
| 关 键 词： | 冰雹 冰雹日 年际变化 降雹频次 时空分布 |
| 收稿时间： | 2018-05-05 |
Analysis of Spatial and Temporal Variation Characteristics of Hail from 1997 to 2017 in Weining of Guizhou Province |
| |
| Institution: | 1. Guizhou Hail Prevention and Control Technology Engineering Center, Guiyang 550001, China;2. Guizhou Institute of Mountain Climate and Environment, Guiyang 550001, China;3. Weining Meteorological Bureau, Wwining 553100, China |
| |
| Abstract: | Using statistical methods ArcGis geographic information analysis tools,the 21 years’ hail data of 37 stations from 1997 to 2017 are analyzed to reveal the characteristics of hail in Weining County and get annual,monthly and daily features. The spatial distribution characteristics and the correlation test of altitude and hail frequency also been analyzed. The results show that the annual average hail day in Weining county is 15.3 days, and the annual changes of hail days are decreasing and then increasing, but the number of hail days is less than the end of twentieth Century. The number of hail days M-K test shows that the number of hail days has been increasing gradually from 2003,and there is a sudden change of hail day after 2010. The hail mainly occurred in 4 ~ 8 months,accounting for 98. 36% of the whole hail days,more in spring and summer,and less in autumn and winter. In spring,the number of hail days is 31. 15%,and the number of hail days in summer is 67. 21%. Hail mainly occurred at 13~ 21,accounting for 85. 07% of the number of hail occurrences in one day,the frequency is high in the afternoon to the evening. The hail mainly occurs in the northern,central, western,Northwestern,South and south-west Frontlines of the Weining county. There is a positive correlation between the altitude of each township and the frequency of hail,the correlation coefficient is 0. 412,and the hail frequency increases with the increase of the topographic elevation. There is no correlation between the frequency of hail and the difference of latitude and longitude. These conclusions can provide scientific reference for the research and development of Weining hail forecast index for artificial hail. It also provides support for the hail disaster prevention and reduction. |
| |
| Keywords: | |
|
| 点击此处可从《高原山地气象研究》浏览原始摘要信息 |
| 点击此处可从《高原山地气象研究》下载免费的PDF全文 |
|
