巴里坤能见度变化特征分析

Analysis on Variation Characteristics of Visibility in Balikun

摘要: 利用巴里坤县基本气象观测站2014~2019年逐时气象资料，运用统计分析和方法，对巴里坤县能见度进行分析，结果表明：1) 巴里坤近6年来，1~3月能见度相对偏低，6~9月能见度较好；2) 能见度具有明显的日变化，各季节能见度日变化与日出时间有关；3) 低能见度(小于800 m)出现频率较少，多出现在冬季；清晨和上午易高发低能见度事件；4) 能见度与平均气温、相对湿度、降水日数和平均风速有相关关系；影响巴里坤能见度的天气现象主要有雾、沙尘暴、扬沙、浮尘和雨雪天气。

Abstract: Based on hourly meteorological data of Balikun County Basic Meteorological Observatory from 2014 to 2019, visibility in Balikun County is analyzed with statistical analysis and methods. The results show that: 1) Visibility in Balikun County is relatively low from January to March in recent 6 years, and much better from June to September; 2) Visibility has obvious diurnal variation, which is related to sunrise time in each season; 3) Low visibility (less than 800 m) occurs less frequently, mostly in winter; early morning and morning are prone to high incidence of low visibility events; 4) Visibility is related to average temperature, relative humidity, precipitation days and average wind speed; weather phenomena affecting visibility in Balikun mainly include fog, sandstorm, sand blowing, floating dust and rain and snow weather.