河北省气象灾害预警信号分布特征研究

Study on Meteorological Disaster Warning Signal Distribution Formation in Hebei

利用2015—2018年河北省气象灾害预警信号发布资料,运用对比分析、分类统计等方法,得出了近4年河北省各类预警信号发布的时空分布特征、发布频次。分析表明:河北省发布频次最多是暴雨、雷电、大雾、大风4类害性天气预警信号,发布地区主要分布在河北省中南部,预警发布总数由中南向西北减少的趋势,预警信号中南部所占比率为68%。发布级别占比中黄色和蓝色预警占的比例最大,红色级别预警信息比例最小,造成的危害和影响最严重,主要发布在石家庄、邢台、邯郸、沧州和衡水中南部地区。通过研究分析预警信号的时空分布特征,为不同地区建立相应的防御措施提供科学依据,以进一步增强气象防灾减灾预警水平。

The temporali and spatial distribution characteristics, the frequency of early warning release were studied using the warning notices issued in Hebei from 2015 to 2018 and the evaluation forms, by means of classification and statistics methods. The results show that the most frequent warning signals are rainstorm, lightning, fog and gale, which are mainly distributed in the central and southern parts of Hebei Province. The total number of warning signals decreases from the central and southern parts to the northwest. The proportion of warning signals in the central and southern part is 68%. By studying and analyzing the spatial and temporal distribution characteristics of early warning signals, this paper provides a scientific basis for establishing corresponding defensive measures in different regions, so as to further enhance the level of meteorological disaster prevention and mitigation early warning.