牡丹江山区地形逆温对污染物扩散的影响

利用牡丹江2006~2007年较详细每日环保大气监测资料以及探空资料，来分析牡丹江山区出现逆温的属性特征，重点分析并对逆温的生消规律、大气污染物的日变化及出现逆温和没有逆温情况下的浓度变化规律进行研究，来分析逆温对大气主要污染物扩散的影响。结果表明，牡丹江出现逆温主要以地形辐射逆温为主，逆温在08：00和20：00有逆温强度中心峰值，并对大气污染物浓度产生较大影响。当出现逆温时，在05：00～08：00、20：00～23：00时间段，污染物浓度增大，其他时间段浓度较小或变化不十分明显：没有逆温时，大气处于不稳定层结状态，有利于污染物扩散，浓度较小。

Influences of Topographic Temperature Inversion on the Pollutant Diffusion in Mudanjiang Mountain Area

Using the daily environmental protection air monitoring data and sounding data in detail in Mudanjiang during 2006 - 2007, the properties of temperature inversion in Mudanjiang mountain area were analyzed. The generating and disappearing laws of temperature inversion, the daily changes of atmospheric pollutants and the concentration change laws of having the tmnperature inversion or not were studied. The effects of temperature inversion on the diffusion of main atmospheric pollutants were studied. The results showed that temperature inversion in Mudanjiang occurred mainly terrain radiation inversion. The central peaks of temperature inversion intensity appeared at 8：00 and 20：00. The concentration of air pollutants had a greater impact. When the temperature inversion occurred, the concentration of pollutants increased during 5：00 - 8：00 and 20：00 - 23：00 and the concentration in different periods was smaller and had no obvious change. Without temperature inversion, the atmosphere was in the state of unstable stratification, it was beneficial to the diffusion of pollutants with small concentration.