摘要
利用2011—2012年盖州市大气能见度和地面气象要素(相对湿度、风速、气温、气压)的观测资料,分析了盖州地区大气能见度月和日的变化特征及大气能见度与气象要素的相关性。结果表明:盖州市大气高能见度事件多出现在3月和10月,低能见度事件多出现在6—8月;夏季能见度最低,14时能见度最大,20时能见度比08时略小。大气能见度与相对湿度相关性最大,与风速和气温相关性次之,与气压相关性最差;当相对湿度>80.0%时,能见度最低值为10.4±3.2km,大气能见度与气压、气温、相对湿度的相关系数分别为-0.52、0.51和-0.52;其中较高的气温、较大的相对湿度、较小的风速及较低的气压是盖州地区低能见度(<10km)事件发生的主要气象条件。
Based on the observational data of atmospheric visibility and some meteorological parameters （relativehumidity,wind speed,air temperature,and atmospheric pressure） at ground from 2011 to 2012 in Gaizhou of Lia-oning province,the monthly and daily variations of atmospheric visibility as well as its correlation with meteoro-logical parameters were analyzed. The results show that the high visibility events usually occur in March and Octo-ber in Gaizhou, and the low visibility ones mostly occur from June to August. The visibility in summer is the low-est during a whole year, and its largest visibility appears at 14：00, lower one at 08：00, and the lowest at 20：00 dur-ing a day. The correlation of atmospheric visibility with relative humidity is the best, and followed by wind speed,air temperature, and atmospheric pressure. As relative humidity is larger than 80. 0%, the minimum atmosphericvisibility is in the range of 10. 4 - 3.2 kin, and the correlation coefficients between visibility and atmospheric pres-sure, air temperature, and relative humidity are - 0. 52,0. 51 and - 0. 52, respectively. Low visibility events（ 〈 10 km） in Gaizhou mainly result from higher air temperature and relative humidity, as well as smaller windspeed and atmospheric pressure.
出处
《气象与环境学报》
2016年第4期55-62,共8页
Journal of Meteorology and Environment
基金
辽宁省气象局博士科研专项(D201501)
辽宁省科技攻关项目(2013229031)共同资助
关键词
大气能见度
气象要素
相关性
Atmospheric visibility
Meteorological parameters
Correlation
