呼和浩特市城区2010-2013年大气能见度特征及其与气象要素的相关性分析

Visibility features in Hohhot City during 2010- 2013 and the relations with the meteorological elements

汇总了呼和浩特市2010-2013年大气能见度观测资料,分析了这期间呼和浩特市大气能见度的年、月、以及一天中的变化特征。结果表明:近几年来随着大气污染防治举措的加强,呼和浩特市的大气能见度状况较好,且趋于稳定;一年中以7-8月和11月到次年的2月为能见度较差的时段,2-6月能见度高低起伏不大且保持在较好水平;一天之中以14时能见度最好,08时次之,晚间20时最差。探讨了大气能见度与同期地面气象要素的相关关系,结果为:大气能见度与平均风速、气温呈显著正相关关系,与相对湿度呈显著负相关。在此基础上,运用多元线性回归分析方法建立了大气能见度与气象要素间的回归方程。

Observation data of visibility during 2010- 2013 in Hohhot city were summarized,and the variation characteristics of interannual,monthly,and daily changes of visibility during this period were analyzed. The results indicated that the general states of visibility in Hohhot city were preferable and tended to stable in the wake of the strengthening of air pollution prevention and control measures in resent years. The worst periods of visibility in a year were from July to August and from October to February,and the visibility from February to June was flat and fairly preferable. The best visibility was occurred in 14： 00 PM in a day,08： 00 AM was taken the second place,and the worst visibility was appeared in 20： 00 PM. The relevance relationships between the visibility and synchronous meteorological elements were explored,and the results are as follows： visibility were positively correlated with mean wind speed and the air temperatures,and negatively correlated with relative humidity. On this basis,the regression equation between the visibility and meteorological elements was established by the method of multiple linear regression analysis.