| 四川霾时空分布及气象要素分析 |
| |
| 引用本文： | 余芳,李慧晶,任超.四川霾时空分布及气象要素分析[J].高原山地气象研究,2022,42(3):141-144. |
| |
| 作者姓名： | 余芳 李慧晶 任超 |
| |
| 作者单位： | 四川省人工影响天气办公室/高原与盆地暴雨旱涝灾害四川省重点实验室，成都 610072 |
| |
| 基金项目： | 四川省人工影响天气办公室课题（2022RYB001）；高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金项目（SCQXKJYJXZD202105） |
| |
| 摘 要： | 选取2016~2019年四川地区156个站点的逐时能见度、相对湿度和温度资料，分析了霾的时空变化和对应的大气参数值变化特征。结果表明:四川地区霾天气的空间分布差异显著，川西高原和攀西地区发生较少，盆地发生较多。从季节变化来看，霾天气在冬季多发，春秋季次之，夏季最少。从日变化来看，霾在白天的发生次数远高于夜间，11~21时为高发阶段，03~08时为低发阶段；10~12时成霾最多，01~07时和23时成霾较少；20时和23时消霾最多，06~09时消霾最少；90%的霾在8 h内消散。结合气象要素分析，霾发生次数在气温介于7~14℃时最多；根据能见度划分的轻微霾和轻度霾发生次数较多，重度霾发生次数较少；霾发生次数在相对湿度介于2%~33%时最低，在其介于34%~79%时随相对湿度的增大而增加。
|
| 关 键 词： | 霾 日变化 能见度 相对湿度 |
| 收稿时间： | 2022-07-08 |
Analysis of Temporal and Spatial Distribution and Meteorological Elements of Haze in Sichuan |
| |
| Institution: | Sichuan Provincial Weather Modification Office /Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072, China |
| |
| Abstract: | Based on the hourly visibility, relative humidity and temperature data of 156 stations in Sichuan from 2016 to 2019, the temporal and spatial distribution characteristics and the corresponding meteorological parameter values were analyzed. The results showed that there were significant differences in the spatial distribution of haze weather in Sichuan. There were less occurrences in the western Sichuan Plateau and Panxi area, and more in Basin. In terms of seasonal variation, haze weather occurred frequently in winter, followed by spring and autumn, and the least in summer. From the daily change, the number of haze in the daytime was much higher than that in the nighttime, the high incidence stage was from 11:00 to 21:00, and the low incidence stage was from 03:00 to 08:00. The haze was the most during 10:00~12:00, the haze was less during 01:00~7:00 and at 23:00. At 20: 00 and 23: 00, the haze elimination was the most. During 06~09: 00, the haze elimination was the least, about 90 % of the haze dissipated within 8 hours. Combined with the analysis of meteorological factors, the number of haze was the most when the temperature was between 7°C and 14 °C. According to visibility, there were more occurrences of light haze and light haze, and less occurrences of severe haze; the occurrence frequency of haze was the lowest when the relative humidity was between 2 % and 33 %, and increased with the increase of relative humidity when it was between 34 % and 79 %. |
| |
| 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 |
|
