大辽河河口地区污染边界层特征试验研究

利用2007年1～2月份大辽河河口地区沿海和陆地2个地面观测点观测得到的污染边界层的气象资料,探讨了该地区冬季污染边界层日变化特征。结果表明,大辽河河口地区污染边界层受到海陆的影响,在一定的天气条件下,海岸区域200m以下的低空可能出现海陆风。海岸区域不同高度的稳定度变化较陆地区域稳定;该地区风场变化主要在300m左右低空。夜间地区常出现逆温,逆温层厚度稳定在200～300m。热内边界层深入陆地10km,且高度可达800m。海岸区域大气扩散能力较弱,陆地区域较强。

Test Research on Characteristic of Pollution Boundary in Liaohe Outfall Region

Based on meteorological data of two observation sites during Jan.to Feb.2007,inland and seaside of Liaohe outfall region,characteristic of pollute boundary layer was analyzed.The results indicated that in Liaohe outfall region pollute boundary layer was influenced by sea and land.In certain meteorological condition,under 200 m height lower high level land and sea breeze could emerge in seaside.Stability change in various high level in seaside were more stable than that in inland and wind field change was mainly under 300 m height.Moreover,temperature inversion in the region usually appeared and temperature inversion layer was stably among 200-300 m height.Thermal boundary layer could penetrate deeply to inland about 10km and its height was up to 800 m.Dispersion ability in seaside was stronger than that in inland.